Tropical Grasslands-Forrajes Tropicales最新文献_第10页

Salinity tolerance of Avena sativa fodder genotypes 玉米饲料基因型的耐盐性

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-01-30 DOI: 10.17138/TGFT(9)109-119

A. Roy, D. Malaviya, A. Anand, R. N. Choubey, M. J. Baig, Kuldeep Dwivedi, P. Kaushal

{"title":"Salinity tolerance of Avena sativa fodder genotypes","authors":"A. Roy, D. Malaviya, A. Anand, R. N. Choubey, M. J. Baig, Kuldeep Dwivedi, P. Kaushal","doi":"10.17138/TGFT(9)109-119","DOIUrl":"https://doi.org/10.17138/TGFT(9)109-119","url":null,"abstract":"Oats (Avena sativa L.) is an important winter season fodder cultivated in many parts of the world. India faces huge shortages of green forage and possesses large salt-affected areas, so identification of salt-tolerant material offers scope for breeding of cultivars for increasing production from salt-affected soils. Forty-eight genotypes of oats comprised of cultivars, germplasm accessions and advanced breeding lines were evaluated with the aim of identifying salt-tolerant genotypes for use on saline soils and/or in programs to breed more salt-tolerant cultivars. Screening was carried out at different growth stages in both pot and field studies. Germination and seedling vigor at different levels of salinity in terms of electrical conductivity (EC), i.e. EC4, EC8, EC12 and EC16, were assessed. Field-level salinity tolerance was assessed in pits where soils had EC ranging from 3.3 to 3.6 dS/m and pH 9.6. Sand culture experiments were carried out on 2 genotypes at different levels of NaCl solution as well as saline soil scrap solution so as to simulate a real field situation. Na, K, Ca and proline concentrations were estimated to understand the mechanism of salinity tolerance of the crop. The study resulted in identification of some suitable genotypes with acceptable levels of salt tolerance, which can be used in developing productive cultivars for saline soils.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83578030","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

Fermentation quality and aerobic stability of Napier grass ensiled with citric acid residue and lactic acid bacteria 柠檬酸渣和乳酸菌青贮纳皮草发酵品质及好氧稳定性

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-01-30 DOI: 10.17138/TGFT(9)52-59

Xuxiong Tao, Chong-Xiao Ji, Sifan Chen, Jie Zhao, Siran Wang, Junfeng Li, F. Sun, T. Shao

{"title":"Fermentation quality and aerobic stability of Napier grass ensiled with citric acid residue and lactic acid bacteria","authors":"Xuxiong Tao, Chong-Xiao Ji, Sifan Chen, Jie Zhao, Siran Wang, Junfeng Li, F. Sun, T. Shao","doi":"10.17138/TGFT(9)52-59","DOIUrl":"https://doi.org/10.17138/TGFT(9)52-59","url":null,"abstract":"This study was conducted to investigate the effects of adding citric acid residue (CAR) with or without lactic acid bacteria (LAB) to Napier grass (Cenchrus purpureus; syn. Pennisetum purpureum) cv. Sumu No. 2 at ensiling on the fermentation quality and aerobic stability of the resulting silage. Treatments included: Control (Napier grass forage without additives); and Napier grass inoculated with lactic acid bacteria (Lactobacillus plantarum and L. buchneri) at 1 × 10 cfu/g fresh weight (FW) forage (LAB) or 36 g citric acid residue/kg FW forage (CAR) or a mixture of CAR and LAB (CL). Forty-five days after ensiling the silages were tested for chemical and microbial composition and an aerobic stability test was conducted. The addition of CAR with or without LAB increased the DM and lactic acid concentrations in silage and decreased pH plus acetic acid, ammonia nitrogen (NH3-N), neutral detergent fiber and cellulose concentrations relative to Control. The pH in LAB silage was lower than in Control, while lactic acid concentration was higher. During the first 2 days of aerobic exposure, all additives increased the water-soluble carbohydrate (WSC) and lactic acid concentrations and decreased pH plus NH3-N and acetic acid concentrations. Moreover, CL silages had the highest WSC and the lowest NH3-N and acetic acid concentrations during aerobic exposure. However, all additives failed to improve the aerobic stability of the silage. While CAR with or without LAB inoculant improved the fermentation quality of silage made from Napier grass, more studies are warranted to identify additives which can improve aerobic stability of the silage after opening.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85104754","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

Comparison of forage production and nutritive value of 10 Grona spp. accessions in Danzhou, Hainan, China 海南儋州10种格罗纳牧草产量及营养价值比较

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-01-30 DOI: 10.17138/TGFT(9)81-88

Linlin Yan, Rongshu Dong, W. Wenqiang, S. Douxchamps, M. Atieno, Guodao Liu, Yiming Liu

{"title":"Comparison of forage production and nutritive value of 10 Grona spp. accessions in Danzhou, Hainan, China","authors":"Linlin Yan, Rongshu Dong, W. Wenqiang, S. Douxchamps, M. Atieno, Guodao Liu, Yiming Liu","doi":"10.17138/TGFT(9)81-88","DOIUrl":"https://doi.org/10.17138/TGFT(9)81-88","url":null,"abstract":"The demand for high-quality forages is increasing in tropical regions, and could be filled with legume species of the genus Grona, which have good nutritive value. In this study, a comparison of the forage production and nutritive value of 10 accessions of Grona spp. was carried out in the field at Danzhou, Hainan from 2016 to 2018. Yield, plant height, survival rate, leaf:stem ratio and concentrations of crude protein, crude fiber, crude fat (ether extract), nitrogen free extract, crude ash, calcium and phosphorus were measured. Results showed that Grona strigillosa (syn. Desmodium strigillosum) cv. Reyan No. 27 and G. heterocarpa subsp. ovalifolia (syn. Desmodium ovalifolium) cv. Maquenque displayed the best performance, owing to their 261.3% and 235.6% higher dry matter yields, respectively, compared with the Control germplasm, G. heterocarpa subsp. ovalifolia cv. Reyan No. 16 in 2018. Cultivar Maquenque had a higher survival rate than the Control (P<0.05). Regarding nutritive value, cv. Reyan No. 27 exhibited higher crude fat and crude fiber but lower Ca concentrations than the Control (P<0.05). Based on PCA ranking, we concluded that cvv. Maquenque and Reyan No. 27 could be used as suitable candidate materials for livestock production in tropical regions of China. Further studies on their tannin concentrations and their acceptability by animals are needed before practical recommendations can be made.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78819850","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

Tropical Grasslands-Forrajes Tropicales Vol.9 No.2 热带草原-热带饲料第9卷第2期

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-01-30 DOI: 10.17138/tgft(9)144-248

Tgft Journal

引用次数: 0

How does agro-pastoralism affect forage and soil properties in western Serengeti, Tanzania? 农牧业如何影响坦桑尼亚塞伦盖蒂西部的牧草和土壤特性?

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2021-01-30 DOI: 10.17138/TGFT(9)120-133

P. Kavana, E. Mtengeti, A. Sangeda, C. Mahonge, R. Fyumagwa, B. John

{"title":"How does agro-pastoralism affect forage and soil properties in western Serengeti, Tanzania?","authors":"P. Kavana, E. Mtengeti, A. Sangeda, C. Mahonge, R. Fyumagwa, B. John","doi":"10.17138/TGFT(9)120-133","DOIUrl":"https://doi.org/10.17138/TGFT(9)120-133","url":null,"abstract":"The impacts of agro-pastoral activities on soil properties, plus nutritive value and residual standing biomass of herbaceous plants in areas of different land uses in western Serengeti, were evaluated. Vegetation and soil were sampled along 4,000 m transects laid across fallow land, areas grazed only by livestock, mixed grazing (livestock and wildlife) and wildlife grazing only. A total number of 123 plant species were encountered during sampling. Analyses of soil and vegetation samples were conducted at Sokoine University of Agriculture laboratories. The estimated average density of grazing animals encountered was 160 TLU/km on transects within livestock-dominated grazing lands, 129 TLU/km for mixed grazing and 83 TLU/km for wildlife grazing only. Results indicated that ADF, IVDMD, IVOMD, ME and TDN in residual herbaceous forage at flowering were significantly (P<0.05) affected by land use type but CP, NDF and ADL were not affected. Soil pH, OC, CEC, C:N ratio and Ca differed significantly (P<0.05) between land use types. An overall evaluation indicated that regardless of climatic conditions, residual biomass of herbaceous plants in western Serengeti is determined by intensity of grazing, soil C:N ratio and concentrations of Ca and P in the soil. We conclude that agro-pastoral practices conducted in western Serengeti affected residual standing biomass of herbaceous plants and soil properties. We recommend that grazing pressure in communal grazing lands be reduced by either reducing number of grazing animals or duration of grazing in a particular grazing area, and specific studies be conducted to establish stocking rates appropriate for specific communal grazing lands in villages.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77731516","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

Terra Ronca State Park: A potential natural Cratylia argentea (Desv.) Kuntze conservation area in Goiás, Brazil 泰拉隆卡州立公园:潜在的天然阿根廷克拉蒂亚(Desv.)巴西Goiás的Kuntze保护区

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2020-09-30 DOI: 10.17138/TGFT(8)280-288

E. Mattar, W. J. R. Matrangolo, B. P. Brasileiro, E. F. Frade Júnior, T. A. Albuquerque, J. R. Oliveira, J. de Paula-Souza, D. Dias

引用次数: 0

Resistance to the alfalfa weevil in the Iranian collection of Medicago sativa 伊朗苜蓿品种对苜蓿象鼻虫的抗性

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2020-09-30 DOI: 10.17138/TGFT(8)263-279

M. Abbasi

{"title":"Resistance to the alfalfa weevil in the Iranian collection of Medicago sativa","authors":"M. Abbasi","doi":"10.17138/TGFT(8)263-279","DOIUrl":"https://doi.org/10.17138/TGFT(8)263-279","url":null,"abstract":"The Iranian collection of Medicago sativa (alfalfa, 502 accessions) was evaluated under field conditions to identify variation in resistance to the alfalfa weevil (Hypera postica Gyllenhal) between accessions over 4 years. Twenty-one accessions were identified as resistant (score 3) to semi-resistant (score 5) based on K-means cluster analysis. These materials were grouped into 10 groups by means of Duncan's Multiple Range Test. Susceptibility to alfalfa weevil was significantly correlated with some of the agro-morphological traits such as plant height (r = 0.314, P<0.01), regrowth rate (r = 0.435, P<0.01) and fall dormancy score (r = 0.284, P<0.01). In general, the resistant germplasm originated from elevated regions at high latitudes, where a co-evolution between the plant and the pest may have taken place. Multiple regression analysis showed a positive linear relationship between susceptibility to the alfalfa weevil and traits such as growth habit, plant height, length and width of the central leaflet and regrowth rate. The resulting bi-plot based on factor analysis ranked accessions for susceptibility to the pest. The identified germplasm should prove useful in alfalfa breeding programs to develop accessions resistant to the alfalfa weevil.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88455843","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

Evaluation and reparametrization of mathematical models for prediction of the leaf area of Megathyrsus maximus cv. BRS Zuri 巨巨树叶面积预测数学模型的评价与再参数化。BRS Zuri

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2020-09-30 DOI: 10.17138/TGFT(8)214-219

P. B. Fernandes, R. A. Barbosa, M. G. Morais, Cauby Medeiros‐Neto, A. Gurgel, C. M. Costa, Ana Beatriz Graciano da Costa, Juliana Caroline Santos Santana, Manoel Gustavo Paranhos da Silva, G. S. Difante

{"title":"Evaluation and reparametrization of mathematical models for prediction of the leaf area of Megathyrsus maximus cv. BRS Zuri","authors":"P. B. Fernandes, R. A. Barbosa, M. G. Morais, Cauby Medeiros‐Neto, A. Gurgel, C. M. Costa, Ana Beatriz Graciano da Costa, Juliana Caroline Santos Santana, Manoel Gustavo Paranhos da Silva, G. S. Difante","doi":"10.17138/TGFT(8)214-219","DOIUrl":"https://doi.org/10.17138/TGFT(8)214-219","url":null,"abstract":"The aim of this study was to verify the precision and accuracy of 5 models for leaf area prediction using length and width of leaf blades of Megathyrsus maximus cv. BRS Zuri and to reparametrize models. Data for the predictor variables, length (L) and width (W) of leaf blades of BRS Zuri grass tillers, were collected in May 2018 in the experimental area of Embrapa Gado de Corte, Mato Grosso do Sul, Brazil. The predictor variables had high correlation values (P<0.001). In the analysis of adequacy of the models, the first-degree models that use leaf blade length (Model A), leaf width × leaf length (Model B) and linear multiple regression (Model C) promoted estimated values similar to the leaf area values observed (P>0.05), with high values for determination coefficient (>80%) and correlation concordance coefficient (>90%). Among the 5 models evaluated, the linear multiple regression (Model C: β0 = -5.97, β1 = 0.489, β2 = 1.11 and β3 = 0.351; R2 = 89.64; P<0.001) and as predictor variables, width, length and length × width of the leaf blade, are the most adequate to generate precise and exact estimates of the leaf area of BRS Zuri grass.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89153972","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

Mombaça grass development with partial replacement of potassium fertilizer by sodium chloride and the effects of adding calcium 氯化钠部分替代钾肥对蒙巴帕拉达草发育的影响及补钙的影响

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2020-09-30 DOI: 10.17138/TGFT(8)195-202

Paulo Sérgio Santos Silva, R. C. Leite, J. S. S. Carneiro, G. A. D. Freitas, Rubens Ribeiro da Silva

{"title":"Mombaça grass development with partial replacement of potassium fertilizer by sodium chloride and the effects of adding calcium","authors":"Paulo Sérgio Santos Silva, R. C. Leite, J. S. S. Carneiro, G. A. D. Freitas, Rubens Ribeiro da Silva","doi":"10.17138/TGFT(8)195-202","DOIUrl":"https://doi.org/10.17138/TGFT(8)195-202","url":null,"abstract":"The objective of this greenhouse study was to evaluate the effects on development parameters in Megathyrsus maximus cv. Mombaça of partially replacing the potassium (K) in fertilizer by sodium (Na) and the impacts of applying calcium (Ca). The experimental design was completely randomized with 4 replicates, in a 3 × 4 + 3 factorial arrangement. Three Ca sources (CaCO3, CaSO4 and CaCl2) were applied at 4 Ca doses (10, 20, 30 and 40 mg Ca/kg of soil) to the grass where 25% of the K fertilizer was replaced by NaCl. The 3 additional treatments were: application of standard fertilizer (N:P:K) with 100% of K recommendation; application of fertilizer with 25% of K replaced by Na but no Ca applied; and grass with no fertilizer of any kind as Control. The variables analyzed were: leaf area, leaf area ratio, net assimilation rate, relative growth rate and photosynthetic rate. Partial replacement of K by Na up to 25% of the K fertilizer recommendation did not cause significant change in the development of Mombaça grass or to any of the measured parameters. Addition of Ca had minimal impact on the analyzed variables regardless of level or source. These measurements helped to explain why dry matter yields of Mombaça grass were not significantly affected by partial replacement of K by Na up to 25% of the K fertilizer recommendation.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83538025","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

Short-term grazing exclusion impacts using brush packs on soil and grass layers in degraded communal rangelands of semi-arid South Africa and implications for restoration and pasture utilization 半干旱南非退化公共牧场短期禁牧对土壤和草层的影响及其对恢复和牧场利用的影响

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2020-09-30 DOI: 10.17138/TGFT(8)220-233

A. Kwaza, S. Tefera, V. Mlambo, M. Keletso

{"title":"Short-term grazing exclusion impacts using brush packs on soil and grass layers in degraded communal rangelands of semi-arid South Africa and implications for restoration and pasture utilization","authors":"A. Kwaza, S. Tefera, V. Mlambo, M. Keletso","doi":"10.17138/TGFT(8)220-233","DOIUrl":"https://doi.org/10.17138/TGFT(8)220-233","url":null,"abstract":"Brush packs from very thorny tree branches were used to simulate grazing exclosures to measure differences in herbaceous vegetation and soil characteristics over 2 years on small ungrazed plots and large continuously grazed communal rangelands on 3 semi-arid soil types [shallow, red stony ground (SRSG); shallow, dark sandy loam (SDSL); and deep, dark clay-loam (DCL)]. Pasture presentation yields within exclosures exceeded those on continuously grazed areas for all soil types by: 98% (SRSG), 128% (SDSL) and 152% (DCL). Herbage samples harvested from the exclosures contained higher acid detergent fiber (P≤0.001) and acid detergent lignin (P<0.05) concentrations than those from the grazed areas. In SRSG and SDSL soils, herbage samples harvested from the exclosures were deficient in phosphorus (P) for all livestock species. Depending on soil type(s), soil magnesium, organic carbon, nitrogen, P and manganese concentrations were significantly higher within exclosures than in continuously grazed areas (P≤0.05). Any response from nutrients supplied by leaf drop from the brush packs could not be separated from response due to absence of grazing, and this deserves further investigation. Our results indicate that grazing exclusion for short periods (2 years) on these semi-arid rangelands allowed pastures to produce significant growth, demonstrating that pastures were still productive. Our experiences highlighted the difficulties in erecting and retaining conventional fences to exclude livestock from given areas because of theft. Grazing immediately after vegetation recovery may necessitate judicious nutritional intervention with protein, energy and mineral supplementation to get effective utilization of the available forage.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80188366","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: 3