用负压计拟定滴灌马铃薯灌溉计划的方法研究  

Scheduling drip irrigation for potato with tensiometers

作　　者：王凤新[1] 康跃虎[2] 

机构地区：[1]中国农业大学中国农业水问题研究中心,北京100083 [2]中国科学院地理科学与资源研究所,北京100101

出　　处：《干旱地区农业研究》2005年第3期58-64,共7页Agricultural Research in the Arid Areas

基　　金：国家杰出青年科学基金(40125002);国家自然科学基金(40071020)

摘　　要：对马铃薯进行了6个灌水频率处理和5个水势处理的田间滴灌试验。发现在灌水频率为1次/d,土壤水势为-25kPa时,马铃薯的产量最高。试验进一步分析了各处理的土壤水分变化特点,并结合马铃薯的根系分布特征,得出了用以拟定滴灌马铃薯灌溉计划的负压计的埋设方法,提出了用负压计拟定滴灌马铃薯灌溉计划的具体方案。A field experiment with six irrigating frequency treatments and five soil water potential treatments was conducted for potato under drip irrigation. The results suggest that the tuber yield of potato was the highest when the irrigation frequency was once every day and the targeted soil water potential was-25 kPa. Through the analysis of soil water variations and root system distribution features under these two treatments, the suggestion for tensiometer placement in potato field under drip irrigation was proposed, and the idiographic methods of scheduling drip irrigation with tensiometers was presented.

关 键 词：灌溉计划 负压计 滴灌 马铃薯 灌水频率 土壤水分 

分 类 号：S532[农业科学—作物学] S274