共查询到20条相似文献，搜索用时 140 毫秒
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Kalimuthu Senthilkumar Bonaventure J. Tesha Jerome Mghase Jonne Rodenburg 《Paddy and Water Environment》2018,16(4):749-766
Rice is an increasingly important commodity in sub-Saharan Africa. In Tanzania, the rice yield gap is as high as 87%, due to a combination of production constraints and sub-optimal crop management. Reducing this yield gap may be partly achieved through the introduction and dissemination of good agricultural practices (GAP). We conducted 18 farmer-managed on-farm trials in Tanzania, to test a set of GAP components against conventional farmers’ practices (FP) for two consecutive growing seasons in 2013 and 2014. The objectives were: (1) to understand farmers’ capabilities in implementing GAP; (2) to acquire better insights into the merits, relevance and suitability of individual GAP components; and (3) to provide a case study showing that exposure to good practices combined with the farmers’ own experimentations can serve to improve and, trigger a positive change in the participating farmers’ crop management. Compared to the farmers’ own practices, average yield increases of 1 t paddy ha?1 in 2013 and 2.7 t ha?1 in 2014 were achieved when following GAP. These yield advantages were mainly obtained by a higher panicle number, improved harvest index and improved weed control. Farmers experienced difficulties with land levelling, planting or sowing in lines and using rotary weeders, but they were convinced that these technologies are important to boost their rice yields. The case of Tanzania shows that paddy yields can be substantially improved by GAP and that adoption of GAP by smallholder rice farmers can be triggered by stimulating experimentations with such practices on their own farms. 相似文献
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介绍了良好农业操作规范(GAP)的理念、国外发展现状及其快速发展的原因，分析了良好农业操作规范理念优势和绿茶生产实施GAP的必要性，并对制定中国绿茶GAP提出了建议。 相似文献
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按照《中药材生产质量管理规范》（GAP）的要求,结合2年试验研究成果和当地生产实际,初步制定了薏苡GAP栽培技术标准操作规程,为规范薏米栽培生产环节和保证天津薏米质量提供了科学依据。 相似文献
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《Plant Production Science》2013,16(4):241-246
AbstractCapitulum of Artemisia capillaris is used as a crude drug in the Kampo medicines. Ten accessions of A. capillaris collected from various locations in Japan were examined for their flowering date, shoot growth and contents of choleretic substances i.e. capillarisin (GAP) and 6, 7-dimethylesculetin (DME), to select the important characters for capitulum yield and quality, and to characterize each accession. The experiment was conducted at the Tsukuba Medicinal Plant Research Station, Ibaraki, Japan. Accessions collected from higher latitude flowered earlier than those from lower latitude. Accordingly, dry weights of capitula, stems plus leaves and whole shoot in the accessions collected from higher latitudes were lower than those collected from lower latitudes. Larger shoot biomass, the consequence of longer vegetative growth period, was found to be important for higher capitula yield. Shoot length and contents of GAP and DME were not related with flowering date and the latitude of habitats. The results of principal component analysis (PGA) revealed that each accession from various locations was characterized by shoot length, shoot biomass and contents of CAP and DME and that the intra-accessional variations of shoot growth and contents of GAP and DME in the accessions collected from lower latitudes were greater than those from higher latitudes. Based on the results of PCA, the ten accessions were grouped into four types. 相似文献
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论适制乌龙茶品种的特殊性状 总被引：7，自引：0，他引：7
1988—1991年对17个茶树品种鲜叶进行了乌龙茶适制性的研究,结果表明,适制乌龙茶的品种鲜叶形态结构特征是叶片宽、梗粗、节间短、叶长/叶宽比值小、梗粗/节长比值大、叶片厚、上表皮厚和栅栏组织厚等8项性状。这些性状与乌龙茶加工工艺和成茶品质,存在着内在的联系。利用这8项指标,建立了乌龙茶适制性分类判别函数,经对17个品种的各类性状进行回代判别,其准确率达88.2%,因而这8项性状可作为选育和推广乌龙茶良种的理论依据。 相似文献