论文部分内容阅读
为研究生物埂护坡下不同土地利用方式的入渗产流规律,在四川丘陵山区金凤溪小流域内设置了15个简易径流小区,以无生物埂+顺坡耕作(玉米)为对照,对生物埂下水保林(黄柏、柏木)、经济林(枇杷+牧草、枇杷、柑橘)、顺坡耕作(玉米)等6种土地利用类型进行对比分析.结果表明:(1)生物埂显著影响土壤的体积质量、总孔隙、非毛管孔隙度,且不同的土地利用类型之间差异显著.(2)不同土地利用方式的土壤渗透性不同,枇杷+牧草结合的渗透性最强,对照的渗透性最差.(3)不同土地利用方式的产流次数和产流率不同,其中生物埂+顺坡耕作(玉米)的产流次数、产流率分别比无生物埂+顺坡耕作降低26%和20%.
In order to study the infiltration and runoff patterns of different land use patterns under biological slope protection, 15 simplified runoff plots were set up in the Jinfengxi small watershed in the hilly and mountainous areas of Sichuan Province. Biological 埂 + The results showed that: (1) Biomass had a significant impact on the volume and quality of soils (P> 0.05) , Total porosity and non-capillary porosity, and different types of land use have significant differences. (2) The soil permeability of different land use types is different, the permeability of loquat + pasture is the strongest, and the permeability of the control is the worst. (3) The runoff times and runoff rates of different land use patterns were different. The number of runoffs and runoff rates of bio-埂 + downslope cultivation (maize) decreased by 26% and 20% respectively compared with that of non-bio-埂 + .