本文主要研究内容
作者（2019）在《No-tillage effects on grain yield and nitrogen requirements in hybrid rice transplanted with single seedlings: Results of a long-term experiment》一文中研究指出：This study was conducted to determine whether,and if so how,the grain yield and nitrogen（N） requirements of hybrid rice transplanted as single seedlings are affected by no-tillage（NT） practices.A fixed field experiment was done at the Experimental Farm of Hunan Agricultural University in Changsha,Hunan Province,China,from 2004 to 2014.Grain yield and yield attributes（panicle number per m2,spikelet number per panicle,spikelet filling percentage,grain weight,total biomass,and harvest index） were evaluated as well as the N-use characteristics（total N uptake,internal N-use efficiency,and N requirements） of hybrid rice transplanted as single seedlings comparing NT with conventional tillage（CT）.A significant finding was that there were no significant differences in grain yield,yield attributes,and N-use characteristics between CT and NT.Averaged across the 11 years,grain yield and N requirements were 9.51 t ha-1 and 20.2 kg t-1 under CT and 9.33 t ha-1 and 20.0 kg t-1 under NT,respectively.There were significant yearly variations in grain yield,yield attributes,and N-use characteristics observed under both CT and NT.The yearly variation in grain yield was related to simultaneous changes in spikelet number per panicle,grain weight,total biomass,and harvest index.Also,it was found that grain yield was positively correlated with internal N-use efficiency but negatively correlated with N requirements.It is concluded that grain yield and N requirements in hybrid rice when transplanted as single seedlings are not affected adversely by NT.The results of this study suggest that（1） compatible relationships among yield attributes can be established in hybrid rice that is transplanted as single seedlings,and（2） higher grain yield and higher N-use efficiency can be concurrently achieved in hybrid rice transplanted as single seedlings.
Abstract
This study was conducted to determine whether,and if so how,the grain yield and nitrogen（N） requirements of hybrid rice transplanted as single seedlings are affected by no-tillage（NT） practices.A fixed field experiment was done at the Experimental Farm of Hunan Agricultural University in Changsha,Hunan Province,China,from 2004 to 2014.Grain yield and yield attributes（panicle number per m2,spikelet number per panicle,spikelet filling percentage,grain weight,total biomass,and harvest index） were evaluated as well as the N-use characteristics（total N uptake,internal N-use efficiency,and N requirements） of hybrid rice transplanted as single seedlings comparing NT with conventional tillage（CT）.A significant finding was that there were no significant differences in grain yield,yield attributes,and N-use characteristics between CT and NT.Averaged across the 11 years,grain yield and N requirements were 9.51 t ha-1 and 20.2 kg t-1 under CT and 9.33 t ha-1 and 20.0 kg t-1 under NT,respectively.There were significant yearly variations in grain yield,yield attributes,and N-use characteristics observed under both CT and NT.The yearly variation in grain yield was related to simultaneous changes in spikelet number per panicle,grain weight,total biomass,and harvest index.Also,it was found that grain yield was positively correlated with internal N-use efficiency but negatively correlated with N requirements.It is concluded that grain yield and N requirements in hybrid rice when transplanted as single seedlings are not affected adversely by NT.The results of this study suggest that（1） compatible relationships among yield attributes can be established in hybrid rice that is transplanted as single seedlings,and（2） higher grain yield and higher N-use efficiency can be concurrently achieved in hybrid rice transplanted as single seedlings.
论文参考文献
论文详细介绍
论文作者分别是来自Journal of Integrative Agriculture的，发表于刊物Journal of Integrative Agriculture2019年01期论文，是一篇关于,Journal of Integrative Agriculture2019年01期论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自Journal of Integrative Agriculture2019年01期论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。