干旱地区农业研究2011，Vol.29Issue(2)：45-52,8.
土壤水势下限对寒地水稻产量的影响
Effects of lower limit soil water potential on rice yield in cold region
摘要
Abstract
With the rice varieties of Kenjiandao 5 (J) and Kendao 12 (D) as test materials, soil water potential (SWP) was examined rigorously with negative pressure soil moisture tensiometer. Field water-controlling experiments were carried out in the Institute of Jiansanjiang, Daxing Farm Garden and Qing' an Experimental Station from 2007 to 2008. Pot water-controlling experiments were carried out in potted trial base of Heilongjiang Bayi Agricultural University (Daqing), and intermittent controlling water treatments (ICWT) at - 20 kPa and - 10 kPa of SWP were carried out from re-green to mature. The effects of soil moisture on yield of rice were studied systematically in cold region. The resuits are as follows: the ICWT at - 10 kPa of SWP was beneficial to improve the rice yield of different regions. The yield increasing ranges of different varieties in Daxing and Qingan were 1.60％ ～ 7.67％ and 1.51 ％ ～ 6.95％ respectively.The results of potted experiments showed that panicles per hill of two varieties was decreased under the condition of controlling-water treatment, and D variety reached the extremely significant level; Grain numbers of superior and middle-position of J variety and middle and inferior-position of D variety were increased; Kernel seting rate of two varieties were increased, the increasing ranges of middle and inferior-position of J variety reached the significant level, kernel setting rate of superior, middle and inferior-position of D variety increased 4.86％, 5.42％ and 13.30％ respectively. Biomass of J variety was increased, biomass of D variety was signficantly decreased, and economic indexs of two varieties increased 5 .73％ and 3.21 ％ respectively; Economic yield of J variety increased 14.47％, economic yield of D variety was decreased. ICWT at - 10 kPa of SWP were carried out in different eclogical regions, the rates of water saving were all above 20％.关键词
寒地水稻/土壤水分/产量Key words
rice in cold region/ soil moisture/ yield分类
农业科技引用本文复制引用
吕艳东,郑桂萍,郭晓红,殷大伟,马殿荣,徐正进,陈温福..土壤水势下限对寒地水稻产量的影响[J].干旱地区农业研究,2011,29(2):45-52,8.基金项目
国家科技支撑计划项目(2006BAD01A01-6) （2006BAD01A01-6）
国家科技支撑计划项目(2007BAD65B03-3) （2007BAD65B03-3）
公益性行业(农业)科研专项经费项目(nyhyzx07-001) （农业）
农业科技成果转化资金项目(2008GB2B200089) （2008GB2B200089）
