Agronomy Journal最新文献_第4页

Sensitivity of difficult-to-control Palmer amaranth accessions to fluridone and diflufenican 难以控制的帕尔默苋品种对氟啶酮和除虫脲的敏感性

IF 2 3区农林科学

Agronomy Journal Pub Date : 2024-12-18 DOI: 10.1002/agj2.70001

Maria C. C. R. Souza, Matthew C. Woolard, Jason K. Norsworthy, Tristen H. Avent, L. Tom Barber, Rodrigo Botelho

{"title":"Sensitivity of difficult-to-control Palmer amaranth accessions to fluridone and diflufenican","authors":"Maria C. C. R. Souza, Matthew C. Woolard, Jason K. Norsworthy, Tristen H. Avent, L. Tom Barber, Rodrigo Botelho","doi":"10.1002/agj2.70001","DOIUrl":"https://doi.org/10.1002/agj2.70001","url":null,"abstract":"Palmer amaranth (Amaranthus palmeri S. Watson) has evolved resistance to herbicides targeting nine sites of action. Phytoene desaturase-inhibiting herbicides remain among the few sites of action that are still effective in controlling Palmer amaranth. Greenhouse experiments were conducted to evaluate the effectiveness of fluridone and diflufenican in controlling difficult-to-control Palmer amaranth accessions collected in Arkansas from 2016 to 2022, to quantify the response of three accessions that exhibited low sensitivity to both herbicides, and to evaluate the effectiveness of photosystem II inhibitors alone and with fluridone or diflufenican on three accessions. At 14 days after a preemergence application, Palmer amaranth control with fluridone and diflufenican ranged from 42% to 100% and 33% to 99% across 23 accessions, respectively. Three accessions required 10.2 to 26.7 times more fluridone than the susceptible Palmer amaranth standard based on LD50 values (where LD50 is the lethal dose to kill 50% of the population), with less than 50% mortality achieved with a 1x herbicide rate for two of the three accessions. For diflufenican, the LD50 values for the three accessions were 3.9–18.5 times greater than the susceptible standard. An additive response for mortality and biomass reduction resulted from adding fluometuron to fluridone at all rates tested. An additive or sometimes a synergistic response occurred with the combinations of metribuzin plus diflufenican. Overall, fluridone exhibited higher efficacy than diflufenican for most accessions tested. While phytoene desaturase-inhibiting herbicides remain an effective control option for most Palmer amaranth accessions, herbicide mixtures targeting multiple sites of action remain essential for delaying resistance and obtaining effective control of this problematic weed.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Can biostimulants and tillage rotations improve dryland crop productivity and soil microbes? 生物刺激剂和轮作能提高旱地作物生产力和土壤微生物吗？

IF 2 3区农林科学

Agronomy Journal Pub Date : 2024-12-13 DOI: 10.1002/agj2.21738

Flackson Tshuma, James Bennett, Pieter Andreas Swanepoel, Johan Labuschagne, Stephan van der Westhuizen, Francis Rayns

{"title":"Can biostimulants and tillage rotations improve dryland crop productivity and soil microbes?","authors":"Flackson Tshuma, James Bennett, Pieter Andreas Swanepoel, Johan Labuschagne, Stephan van der Westhuizen, Francis Rayns","doi":"10.1002/agj2.21738","DOIUrl":"https://doi.org/10.1002/agj2.21738","url":null,"abstract":"Soil microbes are essential for soil nutrient cycling. However, frequent tillage and the use of synthetic agrochemicals can reduce soil microbial diversity and enzyme activity. In this study, the effects of four tillage treatments (mouldboard plough, shallow tine-tillage, no-tillage, and tillage rotation) and two rates of synthetic agrochemicals (standard and reduced, with biostimulants) on soil microbial diversity and enzyme activity were investigated between 2018 and 2020 in a Mediterranean climate zone in South Africa. It was hypothesized that a reduction in tillage frequency and quantity of synthetic agrochemical application would lead to greater microbial diversity and enzyme activity. Soil samples were collected from the 0- to 150-mm layer of a field trial under a dryland crop rotation system. Soil microbial species richness and abundance were assessed using the Shannon–Wiener diversity and evenness indices. The activities of four microbial enzymes—β-glucosidase, acid phosphatase, alkaline phosphatase, and urease—were used to evaluate ecosystem functioning. The combined effects of tillage rotation with a shallow tine implement and the application of biostimulants failed to significantly improve soil microbial diversity, enzyme activity, and crop productivity relative to other treatments. However, the combination did not reduce the wheat (Triticum aestivum) grain yield and quality, and soil biological parameters. Furthermore, the less intensive tillage treatments, ST, NT, and ST-NT-NT-NT, resulted in higher enzyme activity than the mouldboard treatment. Therefore, we suggest that combining non-intensive tillage with reduced synthetic agrochemical use can be a safer, more environmentally friendly alternative to intensive tillage and high agrochemical application in dryland cropping systems.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.21738","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Potential of short-duration millets as a post-winter wheat crop in Ontario, Canada 在加拿大安大略省，短时黍作为冬后小麦作物的潜力

IF 2 3区农林科学

Agronomy Journal Pub Date : 2024-12-13 DOI: 10.1002/agj2.21740

Roshan Pudasaini, Manish N. Raizada

{"title":"Potential of short-duration millets as a post-winter wheat crop in Ontario, Canada","authors":"Roshan Pudasaini, Manish N. Raizada","doi":"10.1002/agj2.21740","DOIUrl":"https://doi.org/10.1002/agj2.21740","url":null,"abstract":"In northern latitudes, the diversity of the maize (Zea mays L.)–soybean (Glycine max L.) cropping system can be increased by including winter wheat as a rotation crop, providing long-term benefits including improved nutrient availability, nutrient-use efficiency, soil structure, and moisture holding. However, in Ontario, Canada, few farmers have adopted winter wheat (Triticum aestivum L.) due to low profitability. After the wheat harvest, there is a 3-month window with warm days and moist soil, sufficient to grow a short-duration crop. Some millet varieties are short duration. Millets are increasingly valued economically as “ancient grains” for humans, as a nutritious forage, and as effective cover crops due to their fibrous roots and dense foliage. Though millets offer similar long-term benefits to wheat in a rotation, they cannot economically compete with maize or soybean as a summer season crop. We hypothesized that the economic constraints of winter wheat and millets could be overcome by double cropping, specifically by adding a low-input, short-duration millet after winter wheat is harvested. The objective of this study was to evaluate the potential of millets as a post-winter wheat crop in Ontario. Three years of field trials (2020–2022) were conducted in Elora and Essex, Ontario, starting with 81 accessions of five millet crops. Selected accessions of proso millet (Panicum miliaceum L.) produced up to 0.5 t/ha grain yield, whereas foxtail millet [Setaria italica (L.) P. Beav] and barnyard millet (Echinochloa spp.) at Elora, and fonio (Digitaria sp.) in Essex produced up to 0.9–1.6 t/ha dry shoot yield. However, planting date, initial soil moisture, weed management, and fall frost were observed to be critical for millet success.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.21740","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Short-term effects of a heavy dairy manure application on soil chemical and biological indicators in an irrigated semiarid cropping system 大量施用牛粪对半干旱灌溉系统土壤化学和生物指标的短期影响

IF 2 3区农林科学

Agronomy Journal Pub Date : 2024-12-09 DOI: 10.1002/agj2.21737

R. S. Dungan, V. Acosta-Martinez, R. M. Lehman, D. K. Manter, M. M. Mikha, C. L. Reardon, D. D. Tarkalson, K. S. Veum, S. L. Weyers, P. M. White Jr.

{"title":"Short-term effects of a heavy dairy manure application on soil chemical and biological indicators in an irrigated semiarid cropping system","authors":"R. S. Dungan, V. Acosta-Martinez, R. M. Lehman, D. K. Manter, M. M. Mikha, C. L. Reardon, D. D. Tarkalson, K. S. Veum, S. L. Weyers, P. M. White Jr.","doi":"10.1002/agj2.21737","DOIUrl":"https://doi.org/10.1002/agj2.21737","url":null,"abstract":"Intensive dairy production in southern Idaho is associated with the annual application of manure to croplands. However, a one-time heavy application of manure could alternatively be used as a means to improve soil fertility and health for years or even decades, circumventing the need for frequent applications. To determine if this practice would negatively affect soil properties in the short term, we analyzed chemical and biological indicators of soil health for 2 years after dairy manure incorporation. Soil indicators measured were pH, electrical conductivity, extractable nitrogen (N) and phosphorus, total carbon (C) and N, enzyme activities, net N mineralization, soil organic C, soil protein, active C, ammonia oxidation potential, and particulate organic matter. Manure (with and without synthetic fertilizer) was found to significantly affect chemical and biological indicators in both topsoil (0–15 cm) and subsoil (15–30 cm), but the responses were greater in the subsoil. This can be attributed to the fact that manure was incorporated to approximately 30 cm via moldboard plow. All indicators responded positively to manure, except pH, which decreased slightly in the subsoil in the first year after application. Principal component analysis of chemical and biological indicators, across all years and depths, showed that the first two components explained 62% and 8.5% of the variance. While soil indicators were not adversely affected by manure, silage corn (Zea mays L.) yields in year 1 were significantly lower in manured plots, though in year 2, barley grain (Hordeum vulgare L.) yields were statistically similar among manure and fertilizer.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.21737","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Potassium fertilization effects on dollar spot of annual bluegrass and creeping bentgrass 钾肥对一年生蓝草和匍匐翦股颖一元斑的影响

IF 2 3区农林科学

Agronomy Journal Pub Date : 2024-12-06 DOI: 10.1002/agj2.21725

Zhongqi Xu, Bruce B. Clarke, Daniel L. Ward, James A. Murphy

{"title":"Potassium fertilization effects on dollar spot of annual bluegrass and creeping bentgrass","authors":"Zhongqi Xu, Bruce B. Clarke, Daniel L. Ward, James A. Murphy","doi":"10.1002/agj2.21725","DOIUrl":"https://doi.org/10.1002/agj2.21725","url":null,"abstract":"The effect of potassium on dollar spot of annual bluegrass (ABG; Poa annua L. forma reptans (Hausskn.) T. Koyama) and creeping bentgrass (CBG; Agrostis stolonifera L.) is poorly understood. Two field trials were conducted in 2020 and 2021 to determine the effect of K fertilization on dollar spot of ABG and CBG turf grown on a sand mat layer overlying a sandy loam (fine-loamy, mixed, semiactive, and mesic Typic Hapludults) and mowed at 2.8 mm. A 4 × 2 factorial, randomized complete block design evaluated K (potassium sulfate) applied at 0, 3.4, 6.9, and 13.8 kg ha−1 every 2 weeks and N (urea) applied at 4.9 kg ha−1 every 7 or 28 days over 20 weeks. Infection centers were counted over a 2-week period each year after inoculation with Clarireedia jacksonii in mid-September and used to calculate the disease severity. Increasing K fertilization rate consistently increased dollar spot severity on ABG and CBG. Higher N rate either slightly increased or did not affect disease severity on ABG, and either decreased or had no effect on CBG. This is the first study to document the impact of K fertilization on dollar spot severity of ABG turf. Regression analysis indicated that increases in both leaf tissue and mat layer K were associated with greater dollar spot severity on both species. Future research should determine whether the increased dollar spot response to K fertilization occurs at higher antecedent mat layer and leaf tissue K. Additionally, a broader range of N rates may clarify the dollar spot response.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.21725","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cover crops in organic cotton influence greenhouse gas emissions and soil microclimate 有机棉覆盖作物对温室气体排放和土壤小气候的影响

IF 2 3区农林科学

Agronomy Journal Pub Date : 2024-12-05 DOI: 10.1002/agj2.21735

Sk Musfiq Us Salehin, Nithya Rajan, Jake Mowrer, Kenneth D. Casey, Peter Tomlinson, Anil Somenahally, Muthu Bagavathiannan

{"title":"Cover crops in organic cotton influence greenhouse gas emissions and soil microclimate","authors":"Sk Musfiq Us Salehin, Nithya Rajan, Jake Mowrer, Kenneth D. Casey, Peter Tomlinson, Anil Somenahally, Muthu Bagavathiannan","doi":"10.1002/agj2.21735","DOIUrl":"https://doi.org/10.1002/agj2.21735","url":null,"abstract":"Cover crops in organic cotton systems can offset the carbon loss typically observed in conventional systems. However, their effects on greenhouse gas (GHG) emissions and soil microclimate are poorly understood. Our objective was to investigate the effects of cover crops on soil carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4) emissions and soil moisture and temperature dynamics in organic cotton systems. To achieve this, we used static chamber techniques with soil sensors in a field study near College Station, TX, from 2020 to 2022. Cover crops tested were oat (Avena sativa L.), Austrian winter pea (Pisum sativum L.) (AWP), turnip (Brassica rapa subsp. rapa), a mixture of all three, and a fallow control. In the first year of organic transition (2020), mixed species treatment enhanced CO2 emission by 39.6%, 34.4%, and 40% than AWP, turnip, and control, respectively. Compared to the control, N2O emissions were lower in AWP, turnip, and oat treatments by 77%, 57.2%, and 53% in 2020. Weed pressure and drought in 2021 and 2022 neutralized cover crops’ effect on soil GHG emissions. Soils generally acted as net CH4 sinks, but the uptake did not differ among the treatments. Cover crops depleted soil moisture during their growing period, but surface residues helped retain more moisture during the cotton season. Compared to fallow, mixed species and AWP were observed to reduce soil temperature fluctuations. Therefore, in transitioning, organic systems effects of cover crops on soil GHG emissions can vary depending on weather, weed management, and the cover crop types.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.21735","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using red–green–blue vegetation indices to evaluate complex agronomical traits in soybean breeding 利用红绿蓝植被指数评价大豆育种中复杂农艺性状

IF 2 3区农林科学

Agronomy Journal Pub Date : 2024-12-04 DOI: 10.1002/agj2.21723

Mariana Silva Vianna, Filipe Inácio Matias, Giovanni Galli, Emanoel Sanches Martins, Maiara Oliveira, José Baldin Pinheiro

{"title":"Using red–green–blue vegetation indices to evaluate complex agronomical traits in soybean breeding","authors":"Mariana Silva Vianna, Filipe Inácio Matias, Giovanni Galli, Emanoel Sanches Martins, Maiara Oliveira, José Baldin Pinheiro","doi":"10.1002/agj2.21723","DOIUrl":"https://doi.org/10.1002/agj2.21723","url":null,"abstract":"High-throughput phenotyping is an emerging tool that allows access to identify simple and complex traits, accelerating genetic discoveries and selection. Vegetation indices strongly correlate with several economic crop traits, allowing plant breeders to detect variation in breeding populations. Thus, this study used red–green–blue (RGB) vegetation indices to evaluate the influence of the stink bug complex (Euschistus heros, Piezodorus guildinii, Nezara viridula, Dichelops melacanthus, and Edessa meditabunda) on the agronomical traits of soybean (Glycine max) lineages. For instance, two experiments were conducted to assess soybean resistance to the stink bug complex, (1) with and (2) without pesticide control. An unmanned aerial vehicle coupled with an RGB camera acquired aerial photography over the field during the R5 stage. Four vegetation indices and canopy were estimated from the orthomosaic, and the genotypes were evaluated based on agronomical traits. Linear mixed models were used to estimate the variance and significance test of each trait using the likelihood ratio test, and the principal component analysis was performed to verify the multivariate pattern among genotypes. The results showed significant genotypic effects for most traits with high broad-sense heritability for agronomical traits and moderate for vegetation indices. Significant correlations using best linear unbiased predictions were observed among the agronomical traits with the vegetation indices and canopy coverage, which can be used as a tool for the indirect selection of soybean lineages in the breeding pipeline.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.21723","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

United States pasture and rangeland conditions: 1995–2022 美国牧场和牧场条件：1995-2022

IF 2 3区农林科学

Agronomy Journal Pub Date : 2024-12-03 DOI: 10.1002/agj2.21736

Logan R. Bundy, Vittorio A. Gensini, Walker S. Ashley

{"title":"United States pasture and rangeland conditions: 1995–2022","authors":"Logan R. Bundy, Vittorio A. Gensini, Walker S. Ashley","doi":"10.1002/agj2.21736","DOIUrl":"https://doi.org/10.1002/agj2.21736","url":null,"abstract":"USDA National Agricultural Statistics Service pasture and rangeland condition data were used to establish a novel spatiotemporal climatology of condition ratings across the conterminous United States for the May–October grazing season over the 1995–2022 study period. On average, the coverage of grazing land that provides adequate or excess feed underwent a significant reduction during a typical season. Spatially, the southwestern United States exhibited the poorest grazing land conditions on average, with over 20 years below the national mean condition rating. At the national aggregated level, conditions degraded during the 28-year study period, and the most significant trends were observed for grazing lands considered to have poor or very poor condition coverage, which increased. Robustly increasing trends in poor and very poor condition coverage were most apparent across the western half of the United States, which is predominantly rangeland. Meanwhile, the eastern half of the United States, which is mostly pastureland, generally experienced condition improvements. Overall, continued regional climatic changes that may result in increasing temperatures, variable precipitation totals, and subsequent soil moisture declines leading to increased drought instances will continue to impose challenges for grazing land managers. Grazing land condition declines can result in increased feed supply demand and reduced grazing capacity. Should these trends continue, there will be a growing need for flexible livestock, forage, and grazing management strategies in the coming decades to adapt to climate change-induced impacts on water-sensitive ecosystems.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764254","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

Rice Haun stage estimation based on mechanistic and machine learning methods 基于机械和机器学习方法的Rice Haun阶段估计

IF 2 3区农林科学

Agronomy Journal Pub Date : 2024-11-28 DOI: 10.1002/agj2.21733

Guoqing Lei, Wenzhi Zeng, Jin Yu, Jie He, Shenzhou Liu, Xinxin Shao, Zhipeng Ren, Thomas Gaiser, Amit Kumar Srivastava

{"title":"Rice Haun stage estimation based on mechanistic and machine learning methods","authors":"Guoqing Lei, Wenzhi Zeng, Jin Yu, Jie He, Shenzhou Liu, Xinxin Shao, Zhipeng Ren, Thomas Gaiser, Amit Kumar Srivastava","doi":"10.1002/agj2.21733","DOIUrl":"https://doi.org/10.1002/agj2.21733","url":null,"abstract":"Haun stage (HS), a continuous numerical phenological indicator of cereal crops, is widely used in agronomic management. However, few models have been developed to estimate HS considering the diverse environmental and agronomic influences. In this study, a dataset comprising 2350 HS observations of two rice (Oryza sativa L.) cultivars (Longjing31 and Suijing18) and variables including planting spatiotemporal information, transplanting day of year (TDOY), accumulated air temperature (AcTem), and remote-sensing vegetation indices (VIs) were collected from 226 field plots. Two mechanistic phenology models, Streck and Phyllochron, and three machine learning (ML) models, including the generalized linear model (GLM), gradient boosting machine (GBM), and deep learning (DL), were developed to predict the HS with different combinations of inputs. The results indicate that three ML models outperformed two mechanistic models, even when using simple spatiotemporal data, the relative root mean square error (RRMSE) decreased by more than 0.023. Especially for GBM and DL models exhibiting similar prediction accuracy (RRMSE from 0.0336 to 0.0543), GBM performs relatively better when VIs are included as input factors. The relative error density distributions (REDDs) of estimated HS in the three ML models were relatively spread out when using limited predictive information of spatiotemporal and VIs, especially during the late rice growth stage and for the Suijing18 cultivar. The inclusion of crop cultivar information enhanced the consistency of REDD, and either VIs or (TDOY, AcTem) provided sufficient information for accurate HS estimation. These findings can provide valuable insights for crop phenology estimation and agronomic practices under varying environments.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142749061","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

An overview of the Ohio Corn Performance Test: Trends over 50 years 俄亥俄州玉米性能测试概述：50年来的趋势

IF 2 3区农林科学

Agronomy Journal Pub Date : 2024-11-28 DOI: 10.1002/agj2.21727

Jhonata Cantuaria Medeiros, Jean Zavala, Mohsen Shahrokhi, Richard Minyo, Allen Geyer, Alexander Lindsey, Peter Thomison, Osler Ortez

{"title":"An overview of the Ohio Corn Performance Test: Trends over 50 years","authors":"Jhonata Cantuaria Medeiros, Jean Zavala, Mohsen Shahrokhi, Richard Minyo, Allen Geyer, Alexander Lindsey, Peter Thomison, Osler Ortez","doi":"10.1002/agj2.21727","DOIUrl":"https://doi.org/10.1002/agj2.21727","url":null,"abstract":"The Ohio Corn Performance Test (OCPT) aims to provide farmers, educators, agronomists, and seed companies with information to help growers make decisions regarding hybrid selection and increase overall crop productivity. For more than 50 years, the OCPT has evaluated the agronomic performance of commercially available corn hybrids across the state. The objective of this study was to highlight overall trends as they relate to crop management, agronomic performance, and grain yields. The program has been planted annually at about 10 distinct sites grouped in three regions: Southwest/West Central Region, Northwest Region, and North Central/Northeast Region. Data collection and measurements include crop emergence percentages, lodging ratings, grain moisture, volumetric grain weight, and grain yields. Over the last 50 years, more than 53,000 hybrid combinations (i.e., hybrids × environments × years) were tested in the OCPT. From 1972 to 2021, seeding rates increased from 68,259 to 89,239 seeds ha−1, seedling emergence increased from 86.2% to 94.9%, and final plant stands increased from 58,559 to 84,649 plants ha−1. From these trends, the number of days from planting to harvest decreased by 11.5 days (slightly later planting dates, variable harvest dates), grain moisture at harvest decreased by 48 g kg−1, and average volumetric grain weight increased by 83 kg m−3. The same period had a grain yield gain of 0.135 Mg ha−1 year−1, with 9.09 Mg ha−1 in 1972 and 16.97 Mg ha−1 in 2021 (an 87% increase). Overall, the annual OCPT results show agronomic and yield improvements that have contributed to the selection of hybrids in the state of Ohio.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.21727","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142749060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0