摘要
通过清水与不同肥液浓度的膜孔单点源室内入渗试验,研究了不同浓度的肥液膜孔入渗量、湿润锋运移距离及土壤含水量分布。揭示了土壤膜孔入渗量和湿润锋运移距离随肥液浓度的增加而增大的规律;建立了不同肥液浓度膜孔入渗量和湿润锋运移经验模型;提出了由清水入渗参数、湿润锋运移参数和肥液浓度分别推求膜孔入渗量和湿润锋运移距离的理论模型,经实测资料验证表明,模型精度较高;随肥液浓度的增大,湿润锋运移距离越大,相同深度处的土壤含水量也增大。研究成果为进一步进行膜孔灌溉技术研究奠定了科学基础。
Based on lab experiment under single point source infiltration of film hole irrigation with different fertilizer solution concentration, cumulative infiltration volume under film hole irrigation, wetting front transport distance and the distribution of soil water content with different fertilizer solution concentration were researched. The laws of cumulative infiltration volume and transport distance of wetting front increased with the increased solution concentration were presented, mathematical models for cumulative infiltration volume under film hole irrigation and wetting front transport distance were developed, theoretical models for cumulative infiltration volume and transport distance of wetting front by rinsing infiltration parameters, wetting front transport parameters and solution concentration were established. The models were verified by observed datum, wetting front transport distance and the soil water content increased with increased solution concentration at the same depth. The results lay scientific foundation for further study of film hole irrigation.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2006年第3期95-99,106,共6页
Journal of Hebei Agricultural University
基金
国家自然科学基金项目(50579064)
陕西高校省级重点实验室重点科研项目(03JS041)
国家自然科学基金项目(50179030)
西北农林科技大学旱区农业水土工程教育部重点实验室基金项目
关键词
膜孔灌
点源入渗
肥液浓度
水分运移特性
film hole irrigation
point source infiltration
fertilizer solution concentration
water transport characteristics
