摘要
本文依据南通农水试验站的实验资料,统计分析旱作物(小麦、棉花)利用地下潜水量的规律,阐述在发展节水灌溉农业中,应考虑旱作物利用地下水量的问题。
By water balance method and a series of large lysimeters we measured and studied the ground water utilization amount of rainfed crop and its rule of change at different ground water levels which are controlled autdmatical-ly. Along wilh the rise of ground water level, the used ground water amount increased progressively according to a minus power exponential curve approximately, when the depth of ground water is between 0.9 and 1. 5meter, the ground water utilization amount of rain-fed crop accounts for 30%-50% of the evapotranspiration of the winter wheat and transplanted cotton during the same period. In shallolw ground water area's, the ground water used by rain-fed crop plays an important role in irrigation agriculture
出处
《地理研究》
CSSCI
CSCD
北大核心
1993年第3期107-113,共7页
Geographical Research
关键词
旱作物
地下水
潜水量
小麦
土壤
rainfed crop, ground water, utilization amount
