水土保持通报2012，Vol.32Issue(4)：86-91,6.
结实前水分供应对寒地水稻灌浆动态和产量的影响
Effects of Water Supply During Stage of Before-heading on Filling Dynamics and Yield of Rice in Cold Regions
摘要
Abstract
With Kenjian 5 Rice as experimental materials, the effects of water supply during the stage of before-head- ing on filling dynamics and yield of rice in cold regions were studied with pots under rainproof shelter. Water dynam- ics in the pots were monitored by examining soil water potential（SWP） using negative pressure soil moisture tensi- ometers. The results indicate that intermittent irrigation at SWP between --8~--10 kPa increased economic yield of Kenjian 5 Rice significantly, along with increases of average growth rate（G） and maximum growth rate（Gmax） of the superior grains and inferior grains and decreases of G and Gmax of the middle grains. The in- dex I values of superior grains and middle grains were improved, despite those of the middle grains. The growing active days（D） were shortened for the superior grains, while elongated for the inferior grains and middle grains. The weight per 1 000 grains（W-~axa） was increased for all the three grades of the rice grains. On the contrary, with unremitting irrigation at SWP between --18~--20 kPa and--28~--30 kPa during the stage of before-heading, economic yield of Kenjiandao 5 were significantly reduced, indicating by increased and Gmax values for the superior grains and decreased G and Gmax values for the middle grains and inferior grains, and raised I values, shortened D and increased W a for the grains of all the three grades.关键词
水分供应/寒地水稻/灌浆动态/产量Key words
water supply/rice in cold region/filling dynamics/yield分类
农业科技引用本文复制引用
郭晓红,郑桂萍,殷大伟,牛岩,于晓羽,李晓蕾,钱海霞,魏长凯,蔡永盛,吕艳东..结实前水分供应对寒地水稻灌浆动态和产量的影响[J].水土保持通报,2012,32(4):86-91,6.基金项目
黑龙江省科技攻关重点项目＂黑龙江省水稻大面积均衡优质高产栽培综合配套技术体系研究” （）
黑龙江省科技攻关项目（GA098102-4）.黑龙江省省长基金项目 （）
黑龙江八一农垦大学博士启动基金项目 （）
