干旱地区农业研究2017，Vol.35Issue(3)：13-19,7.DOI:10.7606/j.issn.1000-7601.2017.03.03
不同生育期土壤水分亏缺对双季超级稻产量及其构成的影响
Effects of soil water deficit at growing stages on yield formation of double-cropping super indica rice
摘要
Abstract
We aimed to investigate the effect of soil water deficit at different growing stages on growth and yield for mation of double-cropping super indica rice by pot experiments.The result indicated that soil water deficit had significant effect on plant height of double-cropping super indica rice during the early growing period in particular the jointing-booting stage,with the largest effect on plant height.Early rice decreased by 4.53 ％ ～ 11.1％ in plant height,and the late rice 3.09％ ～ 10.04％.Plant height was declined with the soil water deficit degree,but that in late growing period had smaller effect.The leaf,ear,root weight and total dry matter accumulation of double-cropping super rice with soil water deficit at different growing period were lower than shallow water irrigation (CK),and the accumulation reduced with the soil water deficit,and root/shoot ratio varied similarly.On the other hand,soil water deficit promoted the growth of the stem and sheath to some extent and showed a compensatory etfect.The yield of the double-cropping super indica rice under the soil water deficit was lower than the CK,and it decreased with the soil water deficit.Grain yield was significantly affected by the soil water deficit,with an order of the jointing-booting stage ＞ effective tillering stage ＞ heading-florescence stage ＞ invalid tillering stage ＞ milky stage for the early rice,while that for the late rice was jointing-booting stage ＞ heading-florescence stage ＞ effective tillering stage ＞ milky stage ＞ invalid tillering stage.In addition,the effect of soil water deficit on the effective panicle number during effective tiller stage and spike number during jointing-booting stage was the greatest,mainly causing yield reduction.关键词
双季超级稻/土壤水分亏缺/生育时期/敏感程度/生长发育/产量Key words
double-cropping super indica rice/soil water deficit/grain yield分类
农业科技引用本文复制引用
钱银飞,邱才飞,邵彩虹,陈先茂,关贤交,陈金,谢江,邓国强,彭春瑞..不同生育期土壤水分亏缺对双季超级稻产量及其构成的影响[J].干旱地区农业研究,2017,35(3):13-19,7.基金项目
国家重点研发专项(2016YFD0801101-4) （2016YFD0801101-4）
国家科技支撑计划项目(2013BAD07B12) （2013BAD07B12）
江西省自然科学基金青年基金(20132BAB214012) （20132BAB214012）
江西省重点研发计划项目(20161ACF60013) （20161ACF60013）
