期刊论文

Effects of Reducing Controlled-release Urea Application on Photosynthetic Characteristics and Economic Benefit of Double-rice Cropping System

中文

土壤

0253-9829

2020

52

04

736-742

10.13758/j.cnki.tr.2020.04.012

国家重点研发计划项目（2018YFD0800500）； 国家自然科学基金区域创新发展联合基金项目（U19A2050）； 湖南省自然科学基金项目（2019JJ50233）； 湖南农业大学“双一流”建设项目（SYL201802004）资助；

本校为第一机构

通过研究控释尿素减施对双季稻产量、经济效益及光合特性的影响,并探讨各构成因素间及其与水稻产量的相互关系,筛选出最佳双季稻连作施用量,为双季稻节本增效提供依据.定位试验结果表明:与常规施肥处理相比,2015—2016年控释尿素处理早晚稻产量分别提高2.6％ ～8.1％ 和6.7％ ～22.3％,早稻控释尿素减N 10％ 处理经济效益、总颖花数和总实粒数分别提高3.00％、0.02％ 和6.34％,晚稻控释尿素减N 20％ 处理分别提高12.18％、5.09％ 和6.53％,且晚稻施用控释尿素的增产增收效果较早稻好.控释尿素处理随着施N量的减少其净光合速率先增加后降低.相关性分析表明:早、晚稻籽粒产量与总颖花数和总实粒数...

A long-term field experiment was conducted to study the effect of reducing controlled-release urea (CRU) on yield, economic benefit and photosynthetic characteristics, and the relationship between yield components and yield of double-cropping rice in order to find out the optimal application rate of CRU for saving cost and improving efficiency. The results showed that compared with conventional fertilization treatment, for early rice, CRU treatments increased early and late grain yield (2015—2016) by 2.6%-8.1% and 6.7%-22.3%, and economic bene...