福建农业学报2016，Vol.31Issue(4)：333-337,5.DOI:10.19303/j.issn.1008-0384.2016.04.001
不同施氮量对杂交水稻干物质生产的影响
Effect of Different Nitrogen Levels on Dry Matter Production of Hybrid Rice
摘要
Abstract
The effects of different nitrogen levels on dry matter production of two-line hybrid rice combination Guanglianguyou 676 were studied. The results indicated that the SPAD value kept higher level under more nitrogen fertilizers and leaf area index (LAI)increased with the increase of nitrogen levels. Crop growth rate (CGR)showed a positive linear correlation with nitrogen levels from transplanting to 30d after transplanting,but then a parabolic correlation. The nitrogen level of 20 g·m-2 has kept the highest CGR since 30d after transplanting. The total dry matter production exhibited a positive linear correlation with nitrogen levels at 30d after transplanting or at elongation stage,but a parabolic correlation at full heading stage or at mature stage. Grain yield was not significant correlation with dry matter accumulation in early stage,but had a significant and very closely significant positive correlation in middle and late stages respectively. About 20% - 30% of the carbohydrates stored in stem and leaf transferred to the spike after full heading stage,which formed rice yield of 21.9%-31.3%.关键词
杂交水稻/施氮量/干物质/积累/运转Key words
hybrid rice/nitrogen level/dry matter/accumulation/transfer分类
农业科技引用本文复制引用
杨惠杰,房贤涛,谢祖钦,何花榕,张居念,卓传营,蔡光璟,占志雄..不同施氮量对杂交水稻干物质生产的影响[J].福建农业学报,2016,31(4):333-337,5.基金项目
福建省科技计划项目---省属公益类科研院所基本科研专项(2014R1021-3、2014R1021-10) （2014R1021-3、2014R1021-10）
福建省科技重大专项(2013NZ0002-2) （2013NZ0002-2）
福建省财政专项---福建农业科学院科技创新团队建设项目(CXTD-2-1312) （CXTD-2-1312）
