摘要
以春玉米为试验材料 ,在甘肃河西民勤沙漠绿洲区进行大田试验 ,研究控制性交替隔沟灌溉水分的时空分布特性和灌水均匀性。试验结果表明 ,在玉米生长期内 ,对灌水沟进行交替干燥和湿润 ,可以使作物根系经受一定程度的干旱锻炼 ,提高根系的吸收补偿效应 ;交替隔沟灌溉中 ,由于在灌水沟和非灌水沟之间没有形成零通量面 ,其水分的侧向入渗明显增强 ,从而可减少土壤水分发生深层渗漏的机率 ;同常规灌溉相比 ,虽然交替灌溉的用水量有所减少 。
The field experiment on the characteristics of spatio temporal distribution of soil water and the uniformity of alternative furrow irrigation was conducted in Gansu Province, with Maize as the material. The results showed that alternatively drying and wetting furrows during the growing season could enhance adsorptive ability of root system. As there was no zero flux field between irrigated furrows and non irrigated furrows, the lateral infiltration of water was increased obviously and the probability of deep percolation was hence decreased.
出处
《中国农业科学》
CAS
CSCD
北大核心
2002年第5期531-535,共5页
Scientia Agricultura Sinica
基金
国家杰出青年科学基金 (4 972 5 10 2 )
国家重点基础研究学科发展规划资助项目 (G1990 1170 8)
