无压灌溉埋管深度的机理性研究及大田试验  

The Mechanism Research and Field Experiment on Lateral Depth in Non-Pressure Irrigation

作　　者：单志杰[1] 蔡焕杰[1] 陈新明[1] 赵伟霞[1] 

机构地区：[1]西北农林科技大学,陕西杨凌712100

出　　处：《中国农村水利水电》2007年第3期44-47,52,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金(50479051);农业科技成果转化资金(04EFN217100395);西北农林科技大学研究生创新教育计划资金

摘　　要：通过室内试验和大田试验,研究了无压灌溉方式下埋管深度对水分运移和作物生长的影响机理。结果表明,在不同埋深时湿润体形状均为球冠,但球冠高度不同;湿润体内含水率均在埋管深度附近达到最大值,并以灌水器所在平面为对称面对称分布;埋管深度对番茄根系的生长分布、早期生物量的积累和后期干物质在果实和茎叶中的分配比例都有影响;埋深10 cm时,番茄的水分利用效率、产量和品质最大,是温室番茄的最佳埋深。Through the laboratory research and field experiment, the influencing mechanisms of lateral depth in non-pressure irrigation on soil water movement and crop growth are studied. The results show that the wetting front shape is spherical cap under different lateral depths, but the height of the cap is different; the soil moisture content reaches the maximum near the lateral depth, and symmetrically distributed with the plane of the douche; the lateral depths have influence on tomato roots distribution, the accumulation of early biomass, and the allocation proportion of anaphase dry mass between fruit and stem; the moisture utilization efficiency, yield and quality of the tomato are the largest when the lateral depth reaches 10 cm, thus it is the best lateral depth for greenhouse tomato.

关 键 词：无压灌溉 埋管深度 湿润体 番茄 根系 生物量 

分 类 号：S275.9[农业科学—农业水土工程]