摘要
旱地小麦补充供水表现为土壤含水量、蒸发蒸腾耗水和产量都相应地增加,当供水达到一定需要量后增产效率下降。补充供水增产的效果旱地比灌溉地显著,但肥力低的旱地在获得水分多于高肥旱地时产量仍然是低的。
Soil water content, evapotranspiration and wheat yield can increase with supple-mentary water supply to wheat in rainfed land, But wheat yield drops when supplemen-tary water supply reaches a certain level. The effects or supplementary water supply onwheat yield in rainfed land is more apparent than that in irrigated land, while wheatyield remains low in ratnfed land with low fertility and even obtaining much more waterthan that with high fertility.
出处
《干旱地区农业研究》
CSCD
北大核心
1990年第4期105-109,共5页
Agricultural Research in the Arid Areas
关键词
小麦
产量
水分利用率
灌溉
干旱区
drought
wheat
water use efficiency
evapotranspiration
