摘要
基于大田土壤水分入渗试验与相关参数的测定,分析了耕作土壤入渗能力衰减过程,探讨了耕作土壤入渗能力衰减机理。试验结果表明:耕作土壤的入渗能力在农业生产周期内变化较大;耕作土壤由高含水量到低含水量的变化过程中,土壤干容重呈增大趋势,土壤入渗能力呈减小趋势;作物生育期内,耕作土壤入渗能力衰减主要是由于土壤结构的变化所导致的。研究结果可为灌水技术参数的确定及水资源的合理利用提供参考。
Based on soil water infiltration testing and related parameters measured in field, tillage soil water infiltration capacity attenuation process was analyzed and the mechanism was discussed. The results indicated that tillage soil water infiltration capacity has larger changes in agricultural production cycle, with the change of soil water content from high to low water content; soil dry bulk density showed a trend of increase and soil water infiltration capacity showed a trend of decrease; in the period of crop growth, the change in the structure of the soil caused infiltration capacity attenuation. The result is of practical meaning in determining the technical parameters of surface irrigation reasonable and the rational use of water resources.
出处
《太原理工大学学报》
CAS
北大核心
2007年第2期116-118,129,共4页
Journal of Taiyuan University of Technology
基金
山西省自然科学基金资助项目(20051074)
关键词
水分入渗
土壤干容重
相对稳定入渗率
土壤胀缩
water infiltration
soil dry bulk density
the rate of relative steady infiltration
soil shrinkage
