土壤水分入渗特性的时间变异规律研究

Variability of Soils Water Infiltration Features

以大量的大田土壤水分入渗试验资料为依据,分析农业生产周期内土壤水分入渗特性的时空变异规律。结果表明:给定土壤质地条件下,不同耕作条件土壤入渗能力差异甚大;在农业生产周期内,土壤入渗能力、土壤入渗速度和土壤的稳定入渗率随着耕作条件的发展而呈减小趋势;各种耕作条件土壤水分入渗过程有所不同。研究结果为土壤水分入渗特性的进一步研究和节水灌水技术参数的确定提供参考。

Based on the infiltration experiments of field soils, the temporal variation of water infiltration features of field soils were analyzed and discussed. The experimental results indicated that, the water infiltration features of field soils have great difference between different periods of tillage with preset soil texture. During agricultural production cycle, Infiltration capacity, infiltration velocity and rate of stability infiltration of field soils decreased while periods of tillage developed. The process of infiltration of field soils is different between different periods of tillage. The result is of practical meaning in determining the field irrigation technical parameters.