摘要
利用人工模拟降雨试验，研究了0°～20°坡度下的耕作土壤施加0～10％的粉煤灰后，对土壤结构和入渗、产流、产沙的影响。研究结果表明：随农田耕作层中粉煤灰含量的增加，土壤入渗速率明显加快，含10％粉煤灰土壤的入渗速率，较对照（土壤不加粉煤灰）提高了55．34％；施加粉煤灰降低了土壤容重，增加了土壤孔隙度，含10％粉煤灰的土壤，在10°坡时的容重较对照减小了17．42％，而孔隙度提高了9．84％；坡面产流量和土壤流失量降低，含10％粉煤灰的土壤，在20°坡时的产流量仅为对照的26．87％。因此，施加10％的粉煤灰，可有效改善土壤结构和蓄水减沙，具有较高的实用价值。
Through artificial rainfall simulation, the farming soil structure and infiltration, water and sediment yields were studied under different slopes from 0° to 20° and different contents of fly-ash from 0 to 10%. Results show that with the increase of fly-ash content in the farming soil, the soil infiltration rate accelerates obviously. The infiltration rate of farming soil with fly-ash of 10% improves by 55.34% than that of the contrast（soil without fly-ash）. The soil bulk density decreases and the soil porosity increases after adding fly-ash. Compared with the contrast, the bulk density of farming soil with fly-ash of 10% reduces by 17.42%, and the porosity improves by 9.84% at 10° slope. The runoff yield and soil losses decrease. The runoff yield of farming soil with fly-ash of 10%, accounts for 26.87% of that of the contrast at 20° slope. Therefore, after exerting 10% fly-ash in the cultivated soil layers, the soil structure can be improved effectively, and the runoff and sediment are intercepted, which have higher practical value.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2006年第8期50-53,共4页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家"九五"重点科技项目(96-004-05-06)第一子专题"流域综合治理与有限水分高效利用技术体系研究"
关键词
人工降雨
粉煤灰
耕作土壤结构
水土流失
artificial rainfall
fly-ash
farming soil structure
soil erosion
作者简介
段喜明（1967-），男，山西太谷人，副教授，博士，主要从事农业水土工程研究。山西太谷山西农业大学林学院，030801。Email：duanximing0208@sina．com
