摘要
为深入分析不同覆盖材料对干旱区春小麦棵间蒸发的影响,采用微型蒸发仪研究了石羊河流域地膜覆盖和秸秆覆盖条件下的春小麦棵间蒸发。研究表明:试验区春小麦棵间蒸发表现为生长初期和末期较高,生长中期较小的特点。相对无覆盖措施,地膜覆盖和秸秆覆盖日均棵间蒸发量分别降低15.6%和36.1%。无覆盖措施、地膜覆盖和秸秆覆盖的累计棵间蒸发量分别占春小麦生育期降水量及相应总灌水量之和的30.4%,26.2%和19.9%。拔节之前,地膜覆盖和秸秆覆盖条件下春小麦的棵间蒸发受表层土壤水分的影响程度基本一致,拔节之后,秸秆覆盖表现出相对地膜覆盖更好的保墒效果。
In order to analyze the effect of different mulching materials to the soil evaporation of spring wheat,the small evaportors were used to study the soil evaporation under the mulohing condition of film and straw in Shiyang River Basin,the results have shown that： Soil evaporation of spring wheat was higher at the early growth period and terminal phase than the middle growth stage.Comparing film and straw mulching to the no-mulching,the daily average soil evaporation reduced 15.6% and 36.1% respectively.The acumulative soil evaporation under no-mulching,film mulching and straw mulching was accounted for 30.4%,26.2% and 19.6% of total precipitation and irrigation quota in the growth period.The surface soil water content effecting on soil evaporation is basically identical with different mulching materials before spring wheat jointing,but straw mulching has better effect on soil moisture preservation after the jointing stage.
出处
《水资源与水工程学报》
2010年第2期92-95,99,共5页
Journal of Water Resources and Water Engineering
基金
国家自然基金项目(50879027)
中央级科研院所基本科研业务费专项资金资助项目(HKY-JBYW-2007-15)
关键词
地膜覆盖
秸秆覆盖
棵间蒸发
土壤水分
film mulching
straw mulching
soil evaporation
soil water content
作者简介
景明（1979-），男，甘肃会宁人，工程师，主要从事农业节水灌溉方面的研究。
