摘要
根据宁南半干旱偏旱区的田间试验资料，分析了旱地地膜穴播谷子的土壤水分动态变化、农田蒸散、气孔扩散阻力、叶面蒸腾速率、水分利用率和经济效益等。试验结果表明：旱地地膜穴播谷子的耗水量虽比ｃｋ（未覆膜条播）多０．９％～６．３％，但由于叶面蒸腾速率比ｃｋ高７１．１％～８８．７％，故水分利用率高出１．１１４ｋｇ／（ｍｍ·ｈｍ２）～１．８５４ｋｇ／（ｍｍ·ｈｍ２），单位耗水量的产值多１．０９元／（ｍｍ·ｈｍ２）～１．５４元／（ｍｍ·ｈｍ２），虽然旱地地膜穴播谷子增产幅度达１８．８％～２０．６％，但纯收益反比ｃｋ低６３元／ｈｍ２～１３７元／ｈｍ２。
Based on the data of field experiment in semiarid and drougth inclined areas in Southern Ningxia,this paper discusses dynamic change of soil moisture, evapotranspiration of field,stomatal diffusion resistance, evaporation rate of leaf, water use efficiency and economic effect of dryland millet with film mulching and hole seeding. The results indicate that the water consumption of dryland millet with film mulching are increased by 0.9%6.3% compared with ck (unmulched row seeding treatment) ,but the evaporation rate of leaf are 71.7%88.7% more than ck, so that the water use efficiency and output value per millmeter water consumption of dryland millet with film mulching are increased by 1.114 kg/(mmhm2)1.854 kg/(mmhm2) and $1.09 yuan/(mmhm2)1.54 yuan/(mmhm2) respectively compared with ck ,although the mean yild of dryland millet with film mulching are incresed by 18.8%20.6% over against ck ,but the net income decreased by $63 yuan/hm2137 yuan/hm2 as against ck.
出处
《干旱地区农业研究》
CSCD
北大核心
1999年第2期31-36,共6页
Agricultural Research in the Arid Areas
基金
"九五"国家旱农攻关项目
关键词
谷子
旱地
地膜覆盖
穴播
栽培
millet
dryland
film mulching
hole seeding
