长江科学院院报2023，Vol.40Issue(12)：59-64,6.DOI:10.11988/ckyyb.20221448
降雨强度对工程堆积体坡面土壤养分及颗粒组成的影响
Influence of Rainfall Intensity on Soil Nutrients and Particle Size Composition of Engineering Accumulations
摘要
Abstract
The construction of highway has given rise to a large number of engineering accumulation which occupies valuable land resources and also exacerbates soil loss.The aim of this study is to investigate the impact of rainfall intensity on soil nutrients and soil particle composition in engineering accumulations with varying gravel contents in the Karst area of Guangxi Province.Our experimental materials consist of pure soil deposits(0％gravel content),soil-rock mixtures with higher soil content(30％gravel content),and soil-rock mixtures with higher gravel content(70％gravel content).We conducted indoor rainfall simulations with different intensities(30,60,120,150,180 mm·h-1),and measured the variations of soil organic matter,total nitrogen,total phosphorus,and soil particle composition in the engineering accumulations.Results indicate that the nutrient contents of pure soil deposits were significantly higher than those of engineering accumulations with soil-rock mixtures before and after rainfall(P＜0.01).After rainfall,the contents of total phosphorus,total nitrogen,and organic matter in the surface of accumu-lation slope decreased by 9.37％-54.76％,15.24％-38.33％,and 14.63％-38.66％,respectively.However,there were no significant differences in soil nutrient contents among different rainfall intensities(P＞0.05).Additionally,after rainfall,the clay content and sand content decreased while the silt content increased in pure soil accumula-tions;while clay content decreased and sand content increased in engineering accumulations with soil-rock mix-tures.Furthermore,a highly significant positive correlation was observed between soil nutrients and clay content(P＜0.01).The research findings provide a scientific basis for soil and water conservation as well as soil resource man-agement in engineering accumulations resulted from highway construction in Guangxi.关键词
工程堆积体/降雨强度/土壤养分/土壤颗粒/公路Key words
engineering accumulation/rainfall intensity/soil nutrients/soil particle/highway分类
农业科技引用本文复制引用
刘涛,杨以翠,周旺,郑腾辉..降雨强度对工程堆积体坡面土壤养分及颗粒组成的影响[J].长江科学院院报,2023,40(12):59-64,6.基金项目
广西新发展集团(岩溶区绿色公路修建)院士工作站能力建设项目(桂科AD17129047) （岩溶区绿色公路修建）
广西交通运输行业重点科技项目(20200311) （20200311）
