摘要
针对黄土台原自然降水特点及农业生产实际情况 ,在已有研究基础上 ,以具有显著保水性能的地膜覆盖技术为中心 ,设计出旱地小麦自然降水高效利用新模式。研究表明 ,夏闲期采用地膜秸秆两元覆盖技术 ,可以把占小麦生产全年度 5 0 %的夏闲期降水最大限度地蓄积并保存于土壤之中 ,较传统耕法多蓄水 10 8.4mm ,蓄水率达73.2 % ;在此基础上 ,种麦时再应用起垄覆膜沟播技术 ,既可把夏闲期蓄积到土壤中的水分最大限度地保住 ,又可把小麦生育期的降水最大限度地蓄住 ,从而使旱地小麦的水分条件明显改善 ,增产效果显著 ,是黄土台原旱地小麦自然降水高效利用 ,实现高产、稳产的最佳模式选择。
According to the rainfall characteristics and agricultural production reality in the loess tableland, new patterns for winter wheat to make full use of rainfall based on the previous researches were designed. The results show that the technique of film mulching plus straw mulching in summer fallow period collected almost of the rainfall in this period and stored over 73.2% in soil, which is 108.4 mm more than that by conventional tillage. On the basis of storing more water in summer fallow period, adopting of the technique of making ridges plus film mulching and seeding in furrows in sowing time, rainfall also can be kept in soil as much as possible during wheat growth, which then increased the soil moisture and further increased yield of wheat.
出处
《中国农业科学》
CAS
CSCD
北大核心
2003年第5期548-552,共5页
Scientia Agricultura Sinica
基金
国家 8 63节水农业重大专项资助项目 ( 2 0 0 2AA2Z40 2 1)
国家自然科学基金资助项目 ( 3 0 0 70 43 9)
国家"九五"科技攻关资助项目( 96 0 0 4 0 5 0 8)
