摘要
以塑管渗灌技术为基础发展起来的简易微喷灌技术,除具有渗灌的优点外,还具有可移动、投资小、简便灵活、适应性广等特点。小麦越冬期即使补水量不大,也可使土壤水分有明显增加,到翌年春,50~80cm土层含水量补水田高于对照2.57个百分点。小麦返青期补水田0~30cm土层含水量平均比对照高3.39个百分点。在1997~1998年度特殊干旱条件下,不同补水时期的增产效应为抽穗期>拔节期>返青期。补水量在450m3/hm2以内,随补水量的增加,增产幅度增大。地膜覆盖加补水,产量增加366.0~1324.5kg/hm,增产率为25.0%~90.4%。裸地麦田补水,产量增加315.0~701.6kg/hm2,增产率为22.5%~50.2%,产投比为1.2~1.6。
Advantages of micro-sprinkling irrigation method are moving easily, low investment, simple structure and extensive adaptability. After irrigating 200~400m3/hm2, soil water content will be increased quickly, suitable irrigation times are heading stage, joinhng stage and turning green stage.Between 200~400m3/hm2, wheat yield increased depend on increases of irrigation. Under film mulching, after irrigating water, wheat yield increased 25. 0%~90.4% ,compared with noirringating water, and higher 22. 5% ~ 50. 2% than no-irrigating water under wheat farmlalnd of no-film mulching.Micro-sprinkling irrigating method is worth to extend.
出处
《山西农业科学》
1998年第4期7-11,共5页
Journal of Shanxi Agricultural Sciences
关键词
旱地
微喷灌技术
节水
小麦
Dryland
Micro-sprinkling irrigation method
Water-saving method
Wheat