水土保持学报2011，Vol.25Issue(6)：153-158,197,7.
模拟降雨条件下覆盖方式对冬小麦降水利用的影响
Effect Of Different Covering Methods on Rainfall Use of Winter Wheat Under Simulated Rainfall
摘要
Abstract
By setting plastic mulching (PM), 1 500, 4 500, 7 500, and 10 500 kg/hm2 of straw mulching quantiy respectively (SM15, SM45, SM75 and SM105), al.so setting no mulching as control treatment (CK) in winter wheat field, under simulated rainfall situation, the influence of different covering methods on soil e-vaporation, soil moisture and rainfall storage by soil were studied. The results indicated that the daily variations and daily cumulative of soil evaporation had the same trend in all treatments; the difference of soil evaporation with different covering methods was significant in the same period, the daily and accumulative soil e-vaporation volume at each growth stage showed SM105<SM75<PM<SM45<SM15<CK; winter wheat canopy structure affected on soil evaporation after the rain significantly, under the same rainfall condition, soil evaporation of before the jointing stage was significantly greater than after the jointing stage with the same treatment. The treatment for rainfall and evapotranspiration of winter wheat caused fluctuations in soil moisture content presented the same tendency, namely, soil moisture contents in different soil depth increased over time first, then decreased. But the differences of soil moisture with all treatments among the 0 - 100 cm soil layers were significant, including the smallest PM, CK followed, SM105 maximum; rainfall storage by soil also expressed as: SMl05>SM75>SM45>SM15>CK>PM; by canopy interception increasing, the amount of soil moisture and rainfall storage by soil of winter wheat with all treatments after jointing stage was significantly lower than that before the jointing stage. The results could provide theoretical basisfor improving the utilization of natural rainfall and promoting water-saving agriculture in winter wheat field.关键词
冬小麦/模拟降雨/覆盖/土壤蒸发/土壤水分/蓄积量Key words
winter wheat/ simulated rainfall/ mulching/ soil evaporation/ soil moisture/ storage amount分类
农业科技引用本文复制引用
刘战东,高阳,巩文军,段爱旺..模拟降雨条件下覆盖方式对冬小麦降水利用的影响[J].水土保持学报,2011,25(6):153-158,197,7.基金项目
国家现代小麦产业技术体系建设专项资金(nycytx-03) （nycytx-03）
