摘要
依据田间试验资料,对比研究了黄土丘陵沟壑区川地和山地梯田两种土地类型条件下谷子水量平衡过程的差异。结果表明,川地谷子生育期总耗水量为544.1mm,山地为468.4mm,前者是后者的1.16倍;谷子全生育期日均耗水量川地为3.30mm/d,山地为2.76mm/d;山地谷子的水分利用效率(WUE)还略高于川地谷子。山地土壤含水量低以及叶面积指数等的不同是引起山地ET/E0偏低的主要原因。
The field experiments were conducted on hillgully region of the Loess Plateau in 2002, and the millet field's water balance were compared between terrace and flatland. The total water consumption was 544.1 mm on the flatland and 468.4 mm on the terrace. The daily water consumption was 3.3 mm/d on the flatland and 2.8 mm/d on the terrace. However, the water use efficiency in the terrace was a little higher than in the flatland. The main reason why the ET/E0 of the terrace was lower than of the flatland was smaller soil moisture and lower leaf area indices in the terrace.
出处
《干旱地区农业研究》
CSCD
北大核心
2003年第4期109-112,共4页
Agricultural Research in the Arid Areas
基金
国家自然科学基金项目(90202011)
中国科学院知识创新重要方向项目(KZCX3-SW-421)
