摘要
对滴灌施肥灌溉条件下水分和养分运移的研究进展进行了总结。许多研究表明 ,滴灌施肥灌溉条件下土壤水、氮的运移和分布主要受土壤特性、灌水器流量、肥液浓度及灌水量的影响 ,而灌水器周围饱和区半径的确定是影响土壤水分和氮素运移模拟精度的关键因素。关于滴灌施肥灌溉条件下氮素运移的研究较少 ,尤其在施肥灌溉系统运行参数对氮素运移、转化、分布影响的研究方面更为薄弱 ,在今后的研究中应予以加强。
The research situation on water and fertilizer transport in soil under fertigation through drip irrigation systems is reviewed in this paper. Many research results indicate that the transport and distribution of water and nitrogen in soils under fertigation are mainly affected by soil type, water application rate from emitter, water volume applied and input concentration of fertilizers. Several research reports show that the radius of saturated area around the emitter strongly affects simulation accuracy of water and nitrogen transport in soil. Extensive researches are obviously necessary to address the influences of drip irrigation system operation parameters on nitrogen transport and transformation in soil since knowledge on the aspect is still limit.
出处
《灌溉排水》
CSCD
北大核心
2002年第2期75-78,F003,共5页
Irrigation and Drainage
基金
国家自然科学基金资助项目 (5 99790 2 7)
