摘要
本文通过对宝鸡峡灌区波涌灌和连续灌前后大量土壤取样的粒度组成分析认为，灌水对农田土壤粒度组成的时空分布的影响是个长期的效应。波涌灌灌水技术参数，除入沟、畦流量外，放、停水时间及循环率对土壤的粒度组成没有明显的影响。灌水过程中入渗携带的极少的细颗粒并不是波涌灌表层土壤导水率降低的原因。
A large amount of soil samples taken before and after irrigation under surge and continuous flows in the Baoji Gauge for studying the graininess composition have been analyzed and their long-term time and spacial effects are recognized. Except for the inflow current of ditches and field-plots,the time of beginning or ceasing irrigation and its circulation rate,the technical parameters of surge flow irrigation have not significant affects toward the graininess composition of soil. The few fine-gains mixed within the inflow irrigation water are not the cause of the lowering of the water conductivity rate of surface soil under the surge flow irrigation.
出处
《灌溉排水》
CSCD
1994年第1期10-14,共5页
Irrigation and Drainage
关键词
波涌灌溉
土壤粒度
粒度组成
灌溉
Surge flow irrigation
Soil graininess
Soil water saturated conductivity Mechanism of water saving
