Tropical Grasslands-Forrajes Tropicales最新文献_第6页

Physiological response of Bajra-Napier Hybrids and Tri-Specific Hybrid to salinity stressPhysiological response of Bajra-Napier Hybrids and Tri-Specific Hybrid to salinity stress Bajra Napier杂交种和三特异性杂交种对盐度胁迫的生理反应

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-09-30 DOI: 10.17138/tgft(9)337-347

S. N. Dheeravathu, Kajal G Singh, P. Ramteke, Reetu, N. Dikshit, M. Prasad, D. Deb, Thulasi Bai Vadithe

{"title":"Physiological response of Bajra-Napier Hybrids and Tri-Specific Hybrid to salinity stressPhysiological response of Bajra-Napier Hybrids and Tri-Specific Hybrid to salinity stress","authors":"S. N. Dheeravathu, Kajal G Singh, P. Ramteke, Reetu, N. Dikshit, M. Prasad, D. Deb, Thulasi Bai Vadithe","doi":"10.17138/tgft(9)337-347","DOIUrl":"https://doi.org/10.17138/tgft(9)337-347","url":null,"abstract":"Physiological responses of 3 Bajra-Napier (Cenchrus spp., syn. Pennisetum spp.) hybrid varieties, viz. BNH-3, BNH-6, BNH-10, and 1 ttri-specific hybrid (TSH) were tested under different gradients of soil salinity, i.e. Control, 4, 6 and 8 dS/m electric conductivity (EC), in a pot trial. The experiment was laid out in a factorial completely randomized design with 3 replications. Shoot dry weight, root dry weight, root:shoot ratio and chlorophyll a, chlorophyll b, total chlorophyll and carotenoid concentrations were reduced with increasing salinity level as compared with Control. However, the concentration of Na+ in leaves increased and K+ concentration decreased with increasing salinity level. Physiological parameters, i.e. relative water content (RWC), membrane stability index (MSI), chlorophyll stability index, carotenoid stability index and K+: Na+ ratio, in leaves tended to be higher in the BNH-3 variety than in other varieties. Shoot dry weight showed highly positive significant correlation with RWC, MSI, K+ concentration and K+:Na+ ratio, while it was negatively correlated with Na+ concentration (P<0.01) All BN hybrid varieties and the tri-specific hybrid studied were susceptible to salinity stress, showing marked reductions in growth as the level of salinity increased above 4 dS/m. However, even at salinity levels producing EC of 8 dS/m these varieties still produced 25‒44% DM yields. There are prospects for improving forage yields from saline soils by planting these hybrids but further breeding studies are warranted to identify germplasm with greater tolerance of saline conditions if these soils are to be utilized effectively to contribute more to supplying forage to support the world’s ruminant population.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47189798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Effects of stubble height and season of the year on morphogenetic, structural and quantitative traits of Tanzania grass 茬高和季节对坦桑尼亚禾草形态、结构和数量性状的影响

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-09-30 DOI: 10.17138/tgft(9)256-267

N. M. LAGE FILHO, Aline Lopes, A. C. do Rêgo, F. Domingues, C. Faturi, T. C. Da Silva, E. P. Cândido, Wilton Silva

{"title":"Effects of stubble height and season of the year on morphogenetic, structural and quantitative traits of Tanzania grass","authors":"N. M. LAGE FILHO, Aline Lopes, A. C. do Rêgo, F. Domingues, C. Faturi, T. C. Da Silva, E. P. Cândido, Wilton Silva","doi":"10.17138/tgft(9)256-267","DOIUrl":"https://doi.org/10.17138/tgft(9)256-267","url":null,"abstract":"The objective of this study was to evaluate regrowth period (RP), morphogenetic, structural and productive characteristics of the guinea grass cultivar Tanzania [Megathyrsus maximus (syn. Panicum maximum)] under different stubble heights (SH) during dry (DS) and rainy (RS) seasons in the eastern Amazon region. The treatments were: 5, 15, 25, 35, 45 and 55 cm SH, distributed in a randomized complete block design with 6 replicates. In the 2 seasons, RP decreased linearly with increase in SH, and was considerably shorter in the RS (47 d). Leaf appearance rate decreased linearly from 0.071 to 0.051 leaves/tiller/d with increasing SH, and it was higher during the RS. Increase in SH increased leaf elongation rate, stem elongation rate and leaf area index. In the RS, climatic conditions favored the morphogenesis, resulting in higher herbage accumulation (8,693 kg DM/ha) than in the DS (2,597 kg DM/ha). In associating seasons with SH, we recommend that Tanzania grass be managed at SH between 35 and 45 cm in the DS, resulting in RP from 61 to 64 days, and at SH of 35 cm in the RS, resulting in RP of 41 days. Studies to test this management strategy seem warranted.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41480631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Effect of sowing rate and date on establishment and growth of Trichloris crinita, a native American pasture grass from arid environments, in the Arid Chaco of Argentina 播种速率和播种日期对阿根廷干旱草原美洲原生牧草Trichlis crinita建立和生长的影响

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-09-30 DOI: 10.17138/tgft(9)268-279

D. L. Domínguez, P. Namur, P. Cavagnaro

{"title":"Effect of sowing rate and date on establishment and growth of Trichloris crinita, a native American pasture grass from arid environments, in the Arid Chaco of Argentina","authors":"D. L. Domínguez, P. Namur, P. Cavagnaro","doi":"10.17138/tgft(9)268-279","DOIUrl":"https://doi.org/10.17138/tgft(9)268-279","url":null,"abstract":"In arid regions, revegetation with locally adapted native species can improve forage production and help ameliorate soil degradation. We investigated the effects of 3 sowing dates and 3 sowing rates of Trichloris crinita cv. Chamical-INTA, a perennial forage grass native to arid and semi-arid regions, on pasture establishment parameters in the Argentinian Arid Chaco phytogeographical region. Sowing date significantly influenced plant density and soil coverage at the end of the growing season, with the latest sowing date increasing mean plant density and soil coverage by 42‒66% and 16‒38%, respectively, relative to the 1st and 2nd dates. Conversely, the later sowing dates (2nd and 3rd dates) exhibited significantly lower mean values for all plant growth-related traits, i.e. tillers per plant, plant height and percentage of flowering plants. Sowing rate had a strong effect on plant density at the end of the growing season but not on plant growth parameters. Under the conditions of this study, using intermediate sowing densities (7.5 kg seed/ha) and sowing early in the season, when temperatures were still mild, delivered the best results in terms of pasture density and establishment efficacy. Early sowing resulted in a greater percentage of flowering plants and seed set prior to the first winter frosts, which should ensure ongoing establishment of plants in the next wet season. Longer-term studies to examine the survival of plants and possible increase in plant density over time are necessary to determine if this procedure has sustainable benefits for pastures in the area.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44476890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Effects of plant spacing and fertilizer level on forage yield and chemical composition of hybrid Urochloa cv. Mulato II grass during the first 150 days of growth under irrigation supplementation, in Chagni Ranch, Awi Zone, Ethiopia 株距和施肥量对杂交种草叶草产量和化学成分的影响。埃塞俄比亚阿维区Chagni牧场的Mulato II草在灌溉补充下生长的头150天

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-09-30 DOI: 10.17138/tgft(9)391-396

W. Tadesse, B. Alemu, M. Addis

{"title":"Effects of plant spacing and fertilizer level on forage yield and chemical composition of hybrid Urochloa cv. Mulato II grass during the first 150 days of growth under irrigation supplementation, in Chagni Ranch, Awi Zone, Ethiopia","authors":"W. Tadesse, B. Alemu, M. Addis","doi":"10.17138/tgft(9)391-396","DOIUrl":"https://doi.org/10.17138/tgft(9)391-396","url":null,"abstract":"A study was conducted to evaluate the effects of plant spacing and N fertilizer application on dry matter yield and chemical composition of Urochloa hybrid cv. Mulato II grass for the first 150 days after planting. A factorial experiment with 3 urea fertilizer levels (0, 50 and 100 kg/ha) and 4 spacings between plants and rows (20 × 20, 30 × 40, 40 × 60 and 50 × 80 cm) with 3 replications was used. Data collected were dry matter yield (DMY), leaf:stem ratio and chemical analyses, i.e. crude protein (CP), ash, neutral detergent fiber (NDF), acid detergent fiber (ADF) and acid detergent lignin (ADL) concentrations. Results indicated that DMY, leaf:stem ratio, CP%, NDF% and ADF% were significantly (P<0.05) affected by interactions between plant spacing and fertilizer level. However, ash and ADL were significantly (P<0.05) affected only by main effects. The highest DMYs (9.18 t/ha and 8.93 t/ha) were recorded for narrowest plant spacing (20 × 20 cm) with higher urea fertilizer level (100 kg/ha) and narrowest plant spacing (20 × 20 cm) with medium urea fertilizer level (50 kg/ha), respectively. CP% ranged from 14.6 to 20% and leaf:stem ratio from 1.12 to 1.82:1. Similar studies need to be conducted over longer periods to determine to what extent these findings relate to performance over the life of a permanent pasture.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43406871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Evaluation of corn-soybean inter-cropping systems in southwestern Japan 日本西南部玉米-大豆间作制度评价

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-09-30 DOI: 10.17138/tgft(9)307-314

Ahmad Seyar Azizi, I. Kobayashi, Jonathan Chuuka, G. Ishigaki

{"title":"Evaluation of corn-soybean inter-cropping systems in southwestern Japan","authors":"Ahmad Seyar Azizi, I. Kobayashi, Jonathan Chuuka, G. Ishigaki","doi":"10.17138/tgft(9)307-314","DOIUrl":"https://doi.org/10.17138/tgft(9)307-314","url":null,"abstract":"To assess the effects of inter-cropping corn and soybean under southwestern Japan’s climatic conditions, 5 different treatments were compared, namely: CW (mono-cropped corn - weeded); CTW (corn + soybean cv. Tachinagaha - weeded); CT (corn + soybean cv. Tachinagaha - unweeded); CSW (corn + soybean cv. Suzukaren - weeded); and CS (corn + soybean cv. Suzukaren - unweeded). Parameters measured were height, yield, nutrient composition of corn and soybean and the numbers of Japanese beetles (Popillia japonica). Plant height of mono-cropped corn was significantly (P<0.05) greater than that of corn in most of the inter-cropped treatments. The number of Japanese beetles had increased dramatically, especially on unweeded inter-cropped treatments, at 55 DAS (days after sowing). Fresh and dry matter yields (FMY and DMY) of corn did not differ among treatments (P>0.05), while CTW treatment produced higher FMY and DMY for soybean (P<0.05) than in CSW and CS. Weeding tended to reduce the number of Japanese beetles on soybean plants, but it did not affect yield of soybean in this study. Neutral detergent fiber (NDF) and acid detergent fiber (ADF) concentrations in corn cobs, whole corn plants and whole soybean plants did not differ among treatments (P>0.05), while crude protein (CP) concentration in whole corn plants in CTW exceeded (P<0.05) those for mono-cropped corn and CSW treatments. These results indicated that soybean can be successfully inter-cropped with corn in southwestern Japan. Soybean plants may be infested with Japanese beetles. It is advisable to control weeds in the stands to reduce the level of beetle infestation and to minimize competition for the planted crops.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45785275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Uso de sensores remotos en la determinación del forraje disponible de Urochloa humidicola cv. Llanero bajo pastoreo en la Altillanura colombiana 利用遥感测定湿尾藻有效牧草。哥伦比亚阿尔蒂拉努拉放牧下的大草原

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-09-30 DOI: 10.17138/TGFT(9)376-382

Raúl Alejandro Díaz Giraldo, M. A. D. León, O. López

引用次数: 1

Is organic fertilizer application a viable alternative to synthetic fertilizer for Piatã grass? 施用有机肥料是Piatã草合成肥料的可行替代品吗？

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-09-30 DOI: 10.17138/tgft(9)300-306

Sirio D. S. Reis, M. O. Junior, M. Tomazi, S. S. Cunha, A. Orrico, J. Alves, E. S. Galeano

{"title":"Is organic fertilizer application a viable alternative to synthetic fertilizer for Piatã grass?","authors":"Sirio D. S. Reis, M. O. Junior, M. Tomazi, S. S. Cunha, A. Orrico, J. Alves, E. S. Galeano","doi":"10.17138/tgft(9)300-306","DOIUrl":"https://doi.org/10.17138/tgft(9)300-306","url":null,"abstract":"Organic fertilizer in many cases can replace mineral fertilizers and in consequence reduce production costs and improve soil quality. Thus, the aim of this work was to evaluate productive, morphogenic and structural characteristics of Piatã grass (Urochloa brizantha) fertilized with urea, organic compost and biofertilizer throughout a year. The trial design was a block split-plot in time (seasons) design with 4 treatments (fertilizing with urea, organic compost, biofertilizer and Control) and 6 repetitions. The evaluated parameters were: dry matter production (DMP), leaf elongation rate (LER), leaf appearance rate (LAR), phyllochron (PHYL), leaf lifespan (LLS), pseudostem elongation rate (SER), final leaf length (FLL), number of live leaves (NLL) and number of tillers (NT). The highest LAR values were observed during summer and spring for the treatment with urea, which also produced the highest LER values. No difference was found in SER among the fertilizer treatments but all fertilized treatments were superior to Control. NT and DMP values were highest (P<0.05) in the treatment with urea, followed by biofertilizer, organic compost and Control. In conclusion, while the use of urea provided greatest forage production, applying biofertilizer gave superior yields to organic compost. Other benefits of organic fertilizers should be assessed as well as combinations of organic and inorganic fertilizers.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42658488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

50 years publishing on tropical forages - from Tropical Grasslands and Pasturas Tropicales to Tropical Grasslands-Forrajes Tropicales 出版热带牧草50年-从热带草原和Pasturas热带到热带草原Forrajes热带

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-09-30 DOI: 10.17138/tgft(9)vi-ix

M. Peters, Robert N. Clements, José Luis Urrea-Benítez, Liu Guodao

引用次数: 0

Criterios de uso y conservación de árboles en potreros basados en el conocimiento local de los ganaderos en una zona de bosque seco tropical en Colombia 根据哥伦比亚热带干燥森林地区牧民的当地知识，制定了种马场树木的使用和保护标准

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-09-30 DOI: 10.17138/tgft(9)321-336

Nelson Pérez Almario, Eliana Lizeth Medina Rios, Jairo Mora Delgado, Dagoberto Criollo Cruz, Julián Roberto Mejía

{"title":"Criterios de uso y conservación de árboles en potreros basados en el conocimiento local de los ganaderos en una zona de bosque seco tropical en Colombia","authors":"Nelson Pérez Almario, Eliana Lizeth Medina Rios, Jairo Mora Delgado, Dagoberto Criollo Cruz, Julián Roberto Mejía","doi":"10.17138/tgft(9)321-336","DOIUrl":"https://doi.org/10.17138/tgft(9)321-336","url":null,"abstract":"Trees are attributed an important role in livestock farms, fulfilling various functions. The study documents the retention of woody species in cattle farms from local and technical knowledge in the upper part of the Magdalena river basin, Colombia. 195 semi-structured questionnaires were applied to identify the perception of producers about the classification and uses of tree forage species, based on physical, nutritional, phenological and environmental criteria, as indicators of conservation and use of species in pastures. With these indicators, indices were constructed that identified important characteristics of the species mentioned by the ranchers. Data were analyzed with descriptive statistics, mean comparisons, and multivariate analysis techniques. It is recognized that producers appreciate species based on criteria of use and functions related to their productive activity. Six highly valued species Gliricidia sepium, Guazuma ulmifolia, Pithecellobium dulce, Albizia guachapele, Acacia farnesiana and Albizia saman coincide with other studies of local knowledge. The study provides relevant information on twelve species associated with livestock, which have not been reported in previous studies, so it suggests deepening and complementing with scientific knowledge to recognize and assess the use of these potential species for livestock production, allowing interaction between knowledge in a concerted technological system.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45576865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Biomass production and nutritional properties of promising genotypes of Tithonia diversifolia (Hemsl.) A. Gray under different environments 不同环境下多样叶山雀优良基因型的生物量生产及营养特性

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-09-30 DOI: 10.17138/tgft(9)280-291

J. Rivera, T. Ruíz, J. Chará, J. Gómez-Leyva, Rolando Barahona

{"title":"Biomass production and nutritional properties of promising genotypes of Tithonia diversifolia (Hemsl.) A. Gray under different environments","authors":"J. Rivera, T. Ruíz, J. Chará, J. Gómez-Leyva, Rolando Barahona","doi":"10.17138/tgft(9)280-291","DOIUrl":"https://doi.org/10.17138/tgft(9)280-291","url":null,"abstract":"Tithonia diversifolia is a shrub with excellent forage characteristics that has shown a wide genetic and phenotypic diversity. The objective of this study was to determine the biomass production and nutritional quality of seven genotypes of T. diversifolia with outstanding characteristics for ruminant nutrition, to analyze the Genotype x Environment (GxE) interaction of biomass production and to compare the performance of these genotypes with grasses offered normally in tropical conditions. For the GxE interaction the AMMI and SREG models were used, and evaluations were made in three environments. In the GxE analysis, the interaction was significant and effects of the environment on biomass productivity were observed with differences between genotypes (p <0.05). In the three environments, the chemical composition was adequate to be offered to ruminants. It is worth noting the high content of crude protein (28.89 g/100 g of dry matter - DM), the low fiber content (30.95 g of neutral detergent fiber - NDF/100 g of DM) and the high percentages of in vitrodegradation of DM for all the genotypes. It is possible to conclude that there are superior genotypes of T. diversifolia with the ability to have good productive and adaptive performance for high-altitude and low-altitude zones with low fertility soils. ","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46547942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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