土壤2016，Vol.48Issue(5)：1000-1006,7.DOI:10.13758/j.cnki.tr.2016.05.023
质量指数表征模拟降雨下土壤坡面养分的流失特性
Quality Indices on Nutrient Loss Characteristics of Soil Slope Under Simulated Rainfall
摘要
Abstract
The nutrient loss characteristics of three soils (brown soil, cinnamon soil and red soil) were studied by using indoor automatic rainfall simulation system, soil single quality index (SSQI) and soil comprehensive quality index(SCQI).The results showed that the simulated rainfall caused the different loss levels of nitrogen on all three tested soil slopes, total nitrogen index all decreased, and decreased most at all the bottom slopes; total nitrogen indices on both surface and lower slope reduced most in brown soil, which was 1.33 times and 1.79 times of cinnamon soil, 9.28 times and 3.45 times of red soil, respectively. The available phosphorus content was increased by simulated rainfall, except brown soil’s available phosphorus index reduced by 3.98%, the available phosphorus index on other soils’ slopes increased from 4.00% to 47.73%, increased most in the surface lower slope of red soil. Under simulated rainfall, rapidly available potassium index of red soil increased significantly, that of cinnamon soil changed little, and that of brown soil decreased slightly. After simulated rainfall, surface and lower slope comprehensive indices of brown soil and cinnamon soil were reduced by 33.62%, 35.34% and 22.53%, 33.62%, respectively, while that of red soil increased by 18.93% and 7.00%.关键词
质量指数/模拟降雨/土壤类型/养分流失Key words
Quality index/Simulated rainfall/Soil types/Nutrient loss分类
农业科技引用本文复制引用
郭新送,丁方军,宋付朋,陈士更,葛雨明..质量指数表征模拟降雨下土壤坡面养分的流失特性[J].土壤,2016,48(5):1000-1006,7.基金项目
山东省自主创新专项(2014ZZCX07302)和山东省科技发展计划项目(2013GNC21101)资助。 （2014ZZCX07302）
