干旱地区农业研究2011，Vol.29Issue(6)：31-37,57,8.
结实前水分供应对寒地水稻穗部性状和产量的影响
Effect of water supply before heading on panicle traits and yield of rice in cold region
摘要
Abstract
With Kenjiandao 5 and Kendao 12 as material, the effects of water supply before heading on panicle traits and yield of rice in cold region were studied with potted planting by examining soil water potential (SWP) with negative pressure soil moisture tensiometer. The results indicated: When intermittent irrigation at - 8 ~ - 10 kPa of SWP was carried out during the stage before heading, panicles per hill of two varieties was decreased, grain number per panicle of two varieties were very significantly decreased; kernel seting rate and 1000-grain weight of two varieties were increased; economic yield of Kenjiandao 5 was increased, while economic yield of Kendao 12 was decreased. When unremitting irrigation at - 18 ~ - 20 kPa and - 28 ~ - 30 kPa of SWP was carried out before heading, the panicle length of two varieties were very significantly shortened; the number of primary branches degradation of two varieties were increased; the panicle weight, primary rachis-branches number, second rachis-branches number, panicles per hill, grain number per panicle and 1000-grain weight of two varieties were significantly or very significantly decreased; and economic yield of two varieties were very significantly decreased. Intermittent irrigation at - 8 ~ - 10 kPa of SWP before heading could be used as irrigating index for producing high yield and high quality rice in cold region, while it is unfavorable to carry out unremitting irrigation below - 18 ~ - 20 kPa of SWP before heading.关键词
水分供应/寒地水稻/穗部性状/产量Key words
water supply/ rice in cold region/ panicle traits/ yield分类
农业科技引用本文复制引用
郭晓红,郑桂萍,殷大伟,李明杰,王德斌,钱海霞,魏长凯,吕艳东..结实前水分供应对寒地水稻穗部性状和产量的影响[J].干旱地区农业研究,2011,29(6):31-37,57,8.基金项目
黑龙江省科技攻关重点项目(GA10B102) （GA10B102）
黑龙江省教育厅科学技术研究面上项目(11551318) （11551318）
黑龙江八一农垦大学博士启动基金(B2010-5) （B2010-5）
