摘要
以垦鉴稻5号和垦稻12号为材料,采用负压式土壤湿度计监测盆栽控水试验土壤水势。研究了结实前水分供应对寒地水稻穗部性状和产量的影响。结果表明:结实前进行-8^-10 kPa的间歇控水处理,两品种的收获穗数减少,穗粒数极显著地减少,结实率和千粒重增加;垦鉴稻5号的经济产量增加,垦稻12号的经济产量降低。结实前进行-18^-20 kPa和-28^-30 kPa的持续控水处理,两品种的穗长极显著地缩短;一次枝梗退化数增加;单穗重一次枝梗数、二次枝梗数、穗数、穗粒数和千粒重显著或极显著降低;两品种的产量均极显著降低。结实前进行-8^-10 kPa的间歇控水处理可作为寒地水稻增产保优灌溉的土壤水势指标;结实前不宜持续进行土壤水势为-18^-20 kPa以下的控水处理。
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.
出处
《干旱地区农业研究》
CSCD
北大核心
2011年第6期31-37,57,共8页
Agricultural Research in the Arid Areas
基金
黑龙江省科技攻关重点项目(GA10B102)
黑龙江省教育厅科学技术研究面上项目(11551318)
黑龙江八一农垦大学博士启动基金(B2010-5)
关键词
水分供应
寒地水稻
穗部性状
产量
water supply
rice in coid region
panicle traits
yield
