Italian Journal of Agronomy最新文献

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Junglerice (Echinochloa colona L.) seedling emergence model as a tool to optimize pre-emergent herbicide application 小水蛭(Echinochloa colona L.)幼苗出苗模型作为优化苗期前除草剂施用的工具
IF 2.2 3区 农林科学
Italian Journal of Agronomy Pub Date : 2021-07-06 DOI: 10.4081/IJA.2021.1845
Gabriel Picapietra, H. Acciaresi
{"title":"Junglerice (Echinochloa colona L.) seedling emergence model as a tool to optimize pre-emergent herbicide application","authors":"Gabriel Picapietra, H. Acciaresi","doi":"10.4081/IJA.2021.1845","DOIUrl":"https://doi.org/10.4081/IJA.2021.1845","url":null,"abstract":"Junglerice (Echinochloa colona), one of the worst and most problematic weeds in the world, causes large economic losses as a result of yield loss and control cost increase. Taking into account that this weed emerges in approximately five months from September to January, and considering that reducing herbicide use is key in the current intensification of agricultural production systems, the present study was carried out under the hypothesis that there should be an optimal moment for pre-emergent herbicide application to achieve maximum weed control effectiveness and efficiency. Experiments were therefore carried out from August 2016 to January 2021 in Pergamino, Buenos Aires province, Argentina, using a double-logistic emergence model of junglerice seedlings. Bicyclopyrone plus s-metolachlor, clomazone, and pyroxasulfone plus saflufenacil were applied at different times between 92 and 478 growing degree days (GDD). Single applications between 348 and 399 GDD were observed to reduce junglerice seedling emergence by 85-99%, depending on the herbicide used. Such a seedling emergence reduction could, in combination with a competitive crop and within a sustainable production system, be a convenient strategy to provide significant weed suppression in the field. The overall results from the present study lead to the conclusion that using predictive models for pre-emergent herbicide applications ensures a more effective use of herbicides and reduces the amounts of herbicides used as well as the risks of selecting herbicide-resistant junglerice populations. \u0000Highlights \u0000- Weed occurrence indirectly increases the number of herbicide applications in Argentina. \u0000- Reducing the number and volume of herbicide applications contributes to mitigating environmental impact in the short term. \u0000- There is a critical time during weed emergence in which chemical control via herbicide application is most effective. \u0000- Seedling emergence models are useful management tools to predict critical timing for weed control.","PeriodicalId":14618,"journal":{"name":"Italian Journal of Agronomy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45338509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spray nozzle selection contributes to improved postemergence herbicide crabgrass control in turfgrass 喷雾喷嘴的选择有助于改善草坪草出苗后除草剂crabgrass的控制
IF 2.2 3区 农林科学
Italian Journal of Agronomy Pub Date : 2021-07-06 DOI: 10.4081/IJA.2021.1846
E. Nangle, Z. Raudenbush, Tyler Morris, M. Fidanza
{"title":"Spray nozzle selection contributes to improved postemergence herbicide crabgrass control in turfgrass","authors":"E. Nangle, Z. Raudenbush, Tyler Morris, M. Fidanza","doi":"10.4081/IJA.2021.1846","DOIUrl":"https://doi.org/10.4081/IJA.2021.1846","url":null,"abstract":"For optimum postemergence crabgrass (Digitaria spp.) control, a single quinclorac herbicide application could be properly timed and delivered with spray nozzles that produce spray droplets ranging from very coarse (401 - 500 µm) to medium (226 - 325 µm) in size to maximize target coverage and minimize the potential for drift.  Crabgrass is an invasive annual grass weed of cool-season turfgrass maintain as lawns, golf courses, and sports pitches.  Postemergence herbicide applications for crabgrass control in turfgrass swards often rely on repeated applications for effective control.  Optimizing postemergence crabgrass applications can reduce pesticide inputs and contribute to sustainable turfgrass management practices.  Two field studies evaluating crabgrass control were conducted in 2020 in a mixed stand of Kentucky bluegrass (Poa pratensis L.) with perennial ryegrass (Lolium perenne L.) in Ohio (USA) and in perennial ryegrass in Pennsylvania (USA).  Both sites have histories of natural crabgrass [Digitaria sanguinalis (L.) Scop.] infestation.  A postemergence herbicide, quinclorac, was applied at the product label rate and tank-mixed with methylated seed oil at the crabgrass plant stage of three leaf to one tiller.  Different spray nozzles were selected to deliver the following spray droplet classifications and sizes at 275 kPa:  Delavan Raindrop 1/4, ultra coarse (> 650 µm); TurfJet 1/4TTJO4, extremely coarse (501 - 650 µm); Air Induction AA8004 or XRTeeJet 8015, very coarse (401 - 500 µm); XR TeeJet 8008 or GreenLeaf TDAD04, coarse (326 - 400 µm); XR TeeJet 8004, medium (226 - 325 µm); and XRTeeJet 8003 fine (145 - 225 µm).  Crabgrass pressure was low in Ohio, and herbicide efficacy at 60 days after treatment was considered acceptable when applied from all spray nozzles that produced pray droplet sizes ranging from ultra coarse to fine.  Crabgrass pressure was severe in Pennsylvania, and herbicide efficacy at 60 DAT was considered marginally acceptable when applied from spray nozzles that produced spray droplet sizes ranging from very coarse to medium.  Future research should consider cultural practices that would be complimentary to postemergence herbicide applications with the goal to further reduce pesticide use and minimize any potential environmental impacts related to spray drift. \u0000  \u0000Highlights \u0000- In turfgrass sites with low crabgrass pressure, one postemergence application of quinclorac herbicide could potentially achieve acceptable control with spray nozzles that produce spray droplets ranging from ultra coarse (> 650 µm) to fine (145 - 225 µm). \u0000- In turfgrass sites with heavy crabgrass population and pressure, one postemergence application of quinclorac herbicide is best optimized with spray nozzles that produce spray droplets ranging from very coarse (401 - 500 µm) to medium (226 - 325 µm). \u0000- Overall, turfgrass management practitioners should avoid using spray nozzles that produce a hollow cone spray pattern with ultra coarse (> 6","PeriodicalId":14618,"journal":{"name":"Italian Journal of Agronomy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44782135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Salinity tolerance evaluation of barley germplasm for marginal soil utilization 边缘土壤利用大麦种质耐盐性评价
IF 2.2 3区 农林科学
Italian Journal of Agronomy Pub Date : 2021-07-06 DOI: 10.4081/IJA.2021.1830
K. Dhima, I. Vasilakoglou, K. Paschalidis, N. Karagiannidis, I. Ilias
{"title":"Salinity tolerance evaluation of barley germplasm for marginal soil utilization","authors":"K. Dhima, I. Vasilakoglou, K. Paschalidis, N. Karagiannidis, I. Ilias","doi":"10.4081/IJA.2021.1830","DOIUrl":"https://doi.org/10.4081/IJA.2021.1830","url":null,"abstract":"One greenhouse experiment was conducted to assess the tolerance to salinity and water deficit stresses of 184 barley varieties (breeding lines or registered varieties). Also, a 2-year field experiment was conducted to evaluate the growth and yield components of 16 of these varieties, representing tolerant, intermediate tolerant and susceptible ones, grown simultaneously in saline and nonsaline soils. In the greenhouse, the K-means cluster analysis shown that 17 varieties were tolerant, 72 varieties intermediate tolerant, 16 varieties intermediate susceptible and 79 varieties susceptible. In the field, soil salinity reduced the germination of the barley varieties except for the varieties ICB 100126, Scarlett and Meteor. Barley varieties grown in the saline soil produced 33.2-to 83.4% lower dry biomass, 0.0-to 78.9% fewer ears and 0.0-to 81.5% lower grain yield than those of varieties grown in the nonsaline soil. In the saline soil, the greatest grain yield was provided by the vars. Galt Brea ‘S’ and ICB 100126 (4.87 and 4.31 t ha–1, respectively), without significant differences between saline and non-saline soils. In most barley varieties, chlorophyll content and photosystem II quantum yield were greater under saline than under non-saline conditions. The results of this research indicated that, in barley germplasm, a remarkable genetic variation exists which would contribute to barley production in saline soils. \u0000Highlights - The salinity tolerance of 184 barley varieties was investigated. - There was great variability to salinity tolerance among barley germplasm. - There were barley varieties which grown in saline soil without significant yield reduction. - Barley could be an alternative crop system in soils with increased salinity.","PeriodicalId":14618,"journal":{"name":"Italian Journal of Agronomy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47137132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Problems and perspectives in weed management 杂草管理的问题与展望
IF 2.2 3区 农林科学
Italian Journal of Agronomy Pub Date : 2021-07-06 DOI: 10.4081/IJA.2021.1854
D. Loddo, J. S. McElroy, V. Giannini
{"title":"Problems and perspectives in weed management","authors":"D. Loddo, J. S. McElroy, V. Giannini","doi":"10.4081/IJA.2021.1854","DOIUrl":"https://doi.org/10.4081/IJA.2021.1854","url":null,"abstract":"Despite the wide use of herbicides in the past century, their use is decreasing due to rising resistance phenomena, absence of discovery of new modes of actions and more regulatory restrictions. On the other hand, several tactics and technologies have developed recently providing alternatives from mechanical, cultural, robotic and natural products use perspectives, that could profitably enhance weed management within the agroecosystem and usher in a new paradigm of weed management that integrates chemical and non-chemical weed management practices. \u0000In the next future, herbicide will remain an important tool for weed management and will be increasingly complemented by other innovative tactics and tools in a IWM perspective. This integrated approach would thus preserve the chemical and transgenic technology for future generations.","PeriodicalId":14618,"journal":{"name":"Italian Journal of Agronomy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41902935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Potential elicitors on secondary metabolite production and antioxidant defence activity of two tomato (Solanum lycopersicum L.) varieties 两个番茄品种次生代谢产物产生和抗氧化防御活性的潜在激发子
IF 2.2 3区 农林科学
Italian Journal of Agronomy Pub Date : 2021-07-06 DOI: 10.4081/IJA.2021.1883
Alhagie Cham, M. Zacarías, H. L. Saldaña, R. E. Vázquez Alvarado, Emilio Olivares Sáenz, G. Martínez-Ávila, Omar Guadalupe Alvarado Gómez
{"title":"Potential elicitors on secondary metabolite production and antioxidant defence activity of two tomato (Solanum lycopersicum L.) varieties","authors":"Alhagie Cham, M. Zacarías, H. L. Saldaña, R. E. Vázquez Alvarado, Emilio Olivares Sáenz, G. Martínez-Ávila, Omar Guadalupe Alvarado Gómez","doi":"10.4081/IJA.2021.1883","DOIUrl":"https://doi.org/10.4081/IJA.2021.1883","url":null,"abstract":"Plants protect themselves, after pathogen attack, through the passive and active defence mechanisms. The treatment of plants with various agents, including cell wall fragments, plant extracts, and synthetic chemicals, can induce resistance to subsequent pathogen attack both locally and systemically. In view of the capability of phytochemicals compounds found in fruits and vegetables with different proven health benefits to consumers, there are different strategies to enhance the concentration of these compounds, among which the use of elicitors. Elicitation has been used to trigger different defence responses in plants, which lead to different mechanisms, such as activation of enzymes related with secondary metabolism. In this study we investigated the effects of elicitors (Activane®, Micobiol®, Stemicol® in doses of 1.8 g L–1, 3 m L–1 and 2.5 g·L–1) on the activity of two enzymes (polyphenoloxydase and peroxidase) in leaves as well as on the bioactive content (DPPH scavenging activity, total phenol and total flavonoid content) in fruits of Solanum lycopersicum L. The elicitors studied affected the production of enzyme and antioxidant activities in tomato, though showed a variable influence on the production of total phenolic and flavonoid content in tomato fruits. In general, the elicitors are able to increase polyphenoloxydase activity in leaves and phytochemical properties in fruits, with a significant negative correlation between the DPPH scavenging activity, total phenolic and flavonoids. These findings provide positive directions for the possible use of these elicitors in tomato (‘Bola’ and ‘Saladette’) production in greenhouse. \u0000Highlights - Elicitors increase the enzymatic activity of PPO in tomato leaves. - The production of total phenolic contents and flavonoids depends on type of elicitors. - No effects on the peroxidase content of the tomato leaves. - The antioxidant capacity of the aqueous fruits extract showed a significant difference (P = 0.05) between the treatments in the Saladette variety. - Positive relationship between total phenolic contents and flavonoids.","PeriodicalId":14618,"journal":{"name":"Italian Journal of Agronomy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44012317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effect of Fucus extract and biomass enriched with Cu(II) and Zn(II) ions on the growth of garden cress (Lepidium sativum) under laboratory conditions 在实验室条件下,富Cu(II)和Zn(II)离子的Fucus提取物和生物量对芥蓝生长的影响
IF 2.2 3区 农林科学
Italian Journal of Agronomy Pub Date : 2021-06-25 DOI: 10.4081/ija.2021.1799
Izabela Michalak, Sylwia Baśladyńska
{"title":"Effect of Fucus extract and biomass enriched with Cu(II) and Zn(II) ions on the growth of garden cress (Lepidium sativum) under laboratory conditions","authors":"Izabela Michalak, Sylwia Baśladyńska","doi":"10.4081/ija.2021.1799","DOIUrl":"https://doi.org/10.4081/ija.2021.1799","url":null,"abstract":"<p>In the present study, brown seaweed - <em>Fucus vesiculosus</em> was used as a raw material for the preparation of bio-products for sustainable agriculture. Biosorption was applied to produce fertilizer additives with microelements. <em>F. vesiculosus</em> was enriched with Cu(II) and Zn(II) ions. Biostimulants of plant growth were obtained by seaweed extraction with potassium hydroxide. Different doses of enriched <em>F. vesiculosus</em> (1, 2, 4, 6 mg/per Petri dish) and concentrations of seaweed extract (2.5, 5 and 10%) were examined in germination test on garden cress (<em>Lepidium sativum</em>). The effect of both algal products on the plant length, RGB parameters in leaves and biomass multielement composition was examined. Results showed that the biomass enrichment did not influence plant length and RGB parameters. Taking into account these two parameters, the best results were obtained in the group treated with natural <em>F. vesiculosus</em> (higher than in the control group, treated with distilled water). Enriched <em>F. vesiculosus</em> biofortified garden cress with Cu and Zn. In the case of Fucus extract, 5% concentration increased plant length and the value of RGB parameters when compared with the control group. Also this extract concentration resulted in elevated content of micro- and macroelements in <em>Lepidium sativum</em>. Seaweed extract is recommended for further research as biostimulant of plant growth.</p>\u0000<p><strong>Highlights</strong> <br/><em>- Fucus vesiculosus is a valuable raw material for agriculture. </em><br/><em>- Fucus vesiculosus extract can act as biostimulants of plant growth. </em><br/><em>- Fucus vesiculosus enriched with microelements via biosorption can be used as a fertilizing material providing plants with these nutrients. </em><br/><em>- Fucus products can biofortify edible plants in essential microelements. </em><br/><em>- Fucus extracts can enhance plant length and chlorophyll content.</em></p>","PeriodicalId":14618,"journal":{"name":"Italian Journal of Agronomy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138519348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Crushed bark as a novel soil conditioner for organic plant production 碎树皮作为有机植物生产的新型土壤改良剂
IF 2.2 3区 农林科学
Italian Journal of Agronomy Pub Date : 2021-06-17 DOI: 10.4081/ija.2021.1781
Päivi Kurki, E. Nurmi, Iina Haikarainen, R. Savikurki, J. Kaseva, K. Hakala, Elena Valkama
{"title":"Crushed bark as a novel soil conditioner for organic plant production","authors":"Päivi Kurki, E. Nurmi, Iina Haikarainen, R. Savikurki, J. Kaseva, K. Hakala, Elena Valkama","doi":"10.4081/ija.2021.1781","DOIUrl":"https://doi.org/10.4081/ija.2021.1781","url":null,"abstract":"Due to the reduction of cattle farming, the Finnish agricultural sector currently needs solutions to replace animal manure with new sustainable alternatives. This problem is especially acute for organic farms, which need livestock manure to improve soil fertility and soil organic carbon (SOC) to sustain yield. On the other side, plywood manufacturers aim to find ways to reuse waste fractions such as sandy, wet spruce bark waste. To address both issues, a new soil conditioner was developed from crushed bark (CB) and approved for organic farming by the Finnish Food Authority. To test the advantages of CB in organic wheat production, we conducted a two-year field experiment on a farmer’s field in Mikkeli (Finland) on loamy sand with moderate soil fertility (C 3.5%, C/N ratio 17, pH 6.2). CB (organic matter 80%, C/N ratio 78, pH 5.7-6.0) at 40 t ha–1 was applied either in the first year of the experiment or in both years. In addition to CB, half the plots received base ash (4 t ha–1) obtained from a power plant using wood to maintain the optimal soil pH. All plots were fertilised annually with commercial organic fertilisers. The control plots received no CB or base ash. A one-year application of CB with base ash statistically significantly increased the grain yield by 800 kg ha–1 and grain N uptake by about 10 kg ha–1 in the following growing season compared with the control. In terms of grain yield quality, a one-year application of CB with or without base ash already showed an improvement of 1000 seed weight by 2 g in the first year, and the effect was even more pronounced in the second year of the experiment. Hectolitre weight was increased in the following year after application of CB with base ash. In contrast, a two-year application of CB either alone or with base ash caused no changes in grain yield, N uptake, or yield quality compared with the control. The results indicate that the use of spruce CB with a high C/N ratio as soil conditioner in a large amount may be beneficial in terms of yield and quality when it is applied only once, but not twice in successive years. Future studies need to focus on the long-term residual effects of CB on productivity, as well as soil parameters such as SOC, cation exchange capacity, and soil microbial activity. \u0000Highlights - Crushed bark (C/N ratio 78) - a side stream of plywood manufacture - was tested in a two-year organic field experiment. - A one-year (40 t ha–1) application of crushed bark with base ash increased yield and the quality of organic wheat. - Residual effects of a one-year application were pronounced. - Crushed bark application in two successive years provided no benefits for organic wheat production.","PeriodicalId":14618,"journal":{"name":"Italian Journal of Agronomy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42336190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
How does soil carbon sequestration affect greenhouse gas emissions from a sheep farming system? Results of a life cycle assessment case study 土壤碳固存如何影响牧羊系统的温室气体排放?生命周期评估案例研究的结果
IF 2.2 3区 农林科学
Italian Journal of Agronomy Pub Date : 2021-05-11 DOI: 10.4081/IJA.2021.1789
P. Arca, E. Vagnoni, P. Duce, A. Franca
{"title":"How does soil carbon sequestration affect greenhouse gas emissions from a sheep farming system? Results of a life cycle assessment case study","authors":"P. Arca, E. Vagnoni, P. Duce, A. Franca","doi":"10.4081/IJA.2021.1789","DOIUrl":"https://doi.org/10.4081/IJA.2021.1789","url":null,"abstract":"A life cycle assessment (LCA) study of a transition from semi-intensive to semi-extensive Mediterranean dairy sheep farm suggests that the latter has a strong potential for offsetting greenhouse gas (GHG) emissions through the soil C sequestration (Cseq) in permanent grasslands. The extensification process shows clear environmental advantage when emission intensity is referred to the area-based functional unit (FU). Several LCA studies reported that extensive livestock systems have greater GHG emissions per mass of product than intensive one, due to their lower productivity. However, these studies did not account for soil Cseq of temporary and permanent grasslands, that have a strong potential to partly mitigate the GHG balance of ruminant production systems. Our LCA study was carried out considering the transition from a semi-intensive (SI) towards a semi-extensive (SE) production system, adopted in a dairy sheep farm located in North-Western Sardinia (Italy). Impact scope included enteric methane emissions, feed production, on-farm energy use and transportation, infrastructures as well as the potential C sink arising from soil Cseq with respect to the emission intensity. In order to provide a more comprehensive analysis, we used the following FUs: 1 kg of fat and protein corrected milk (FPCM) and 1 ha of utilised agricultural area (UAA). We observed that the extensification of production system determined contrasting environmental effects when using different FUs accounting for soil Cseq. When soil Cseq in emission intensity estimate was included, we Ac ce pt ed p ap er","PeriodicalId":14618,"journal":{"name":"Italian Journal of Agronomy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44577077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Improving weed control in sustainable agro-ecosystems: role of cultivar and termination timing of rye cover crop 在可持续农业生态系统中加强杂草控制:黑麦覆盖作物品种和终止时间的作用
IF 2.2 3区 农林科学
Italian Journal of Agronomy Pub Date : 2021-05-11 DOI: 10.4081/IJA.2021.1807
Roberta Boselli, N. Anders, A. Fiorini, C. Ganimede, N. Faccini, A. Marocco, M. Schulz, V. Tabaglio
{"title":"Improving weed control in sustainable agro-ecosystems: role of cultivar and termination timing of rye cover crop","authors":"Roberta Boselli, N. Anders, A. Fiorini, C. Ganimede, N. Faccini, A. Marocco, M. Schulz, V. Tabaglio","doi":"10.4081/IJA.2021.1807","DOIUrl":"https://doi.org/10.4081/IJA.2021.1807","url":null,"abstract":"Alternative strategies to control weeds are required at field level to reduce herbicides and derived pollution. Rye (Secale cereale L.) cultivation as cover crop is adopted mainly because of its allelopathic weed control, which takes place throughout a strong inhibition of germination and seedling growth in several grass and broad-leaved weeds. The present study consisted of: i) a field trial, focused on evaluation of biomass production and allelochemical concentration in the biomass, and in situ weed control at 30 days after termination (with two termination timings: T1 heading phase and T2 10 days later) of 8 rye varieties; ii) a pot experiment, focused on the inhibition effect of mulches derived by those 8 rye varieties on four summer weeds: velvetleaf (Abutilon theophrasti Med.), lambsquarters (Chenopodium album L.), redroot pigweed (Amaranthus retroflexus L.), and common purslane (Portulaca oleracea L). Results showed that biomass production was the highest with Protector, closely followed by Primizia, Sito 70, Hellvus, Forestal, and Hymonta. In any case, rye mulching always reduced the weed biomass, especially with Fasto and Forestal. The allelochemical concentration in the biomass was the highest with Fasto and Forestal, and decreased on average from T1 to T2 (-38% for total BX and -57% for isovitexin). Conversely, the rye biomass production increased (on average + 77%) passing from T1 to T2. We found also that the reduction of weed biomass, compared with the control, is highly Ac ce pt ed p ap er correlated with the allelochemical content in rye biomass in the case of T1 termination, while with the biomass production in the case of T2. In pots, a strong inhibitory effect on seedling growth due to rye mulching was observed for C. album (-76%), A. retroflexus (-56%), and P. olearcea (-84%), while not for A. theophrasti. We concluded that, whatever the variety, adopting rye as cover crop may be considered as a suitable practice to reduce weed pressure at the field level. Among all the varieties tested, Forestal and Protector showed the greatest weed suppression potential, as a consequence of high amount of allelochemicals production for Forestal, and high biomass production for Protector. Introduction Weed control strategies based on the use of herbicides are expensive and may affect negatively the quality of soil, water and air (Felsot et al., 2011). The excessive use of chemical herbicides in the last decades led to the development of herbicide resistance: 262 species of herbicide-resistant weeds have been detected on 93 crops in 70 countries (Beckie, 2020). Consequently, a growing interest in alternative strategies for weed management has been stimulated worldwide to address current economic and environmental challenges of crop production (Kumar et al., 2020). In addition, the European Commission recently stated ambitious goals for reducing the herbicide use (-50%) at the field level by 2030 (European Commission, 2021). The use of cover c","PeriodicalId":14618,"journal":{"name":"Italian Journal of Agronomy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42460791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Off-site movement of quinclorac from rice fields 喹氯喹从稻田中的场外迁移
IF 2.2 3区 农林科学
Italian Journal of Agronomy Pub Date : 2021-05-11 DOI: 10.4081/IJA.2021.1798
F. Vidotto, S. Fogliatto, L. Carmagnola, F. De Palo, M. Milan
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