水土保持学报2023，Vol.37Issue(6)：11-17,7.DOI:10.13870/j.cnki.stbcxb.2023.06.002
桂西北喀斯特区石灰土与红壤坡地幼龄橘园降雨侵蚀特征
Rainfall Erosion Characteristics of Young Citrus Orchards on Calcareous Soil and Red Soil Slopes in Karst Areas of Northwest Guangxi
摘要
Abstract
In order to investigate the characteristics of rainfall erosion of young citrus orchards on calcareous soil and red soil slopes in karst areas of northwestern Guangxi,an indoor artificial simulated rainfall experiment was conducted to study the runoff and sediment yield characteristics of young citrus orchards on calcareous soil and red soil slopes under three rainfall intensities(30,60,and 90 mm/h).The results showed that:(1)When the rainfall intensity was 30 and 60 mm/h,the total runoff yield of red soil citrus orchards was 2.46 and 1.83 times that of calcareous soil citrus orchards,respectively,and the red soil citrus orchards was dominated by surface runoff yield,while the calcareous soil citrus orchards was dominated by subsurface flow yield;when the rainfall intensity was 90 mm/h,there was no significant difference in the total amount of runoff between the two(p>0.05),and both of them were mainly by surface runoff.(2)The surface runoff intensity of calcareous soil citrus orchards and red soil citrus orchards increased with the increase of rainfall intensity.However,with the increase of rainfall intensity,the subsurface flow intensity of calcareous soil citrus orchards showed a trend of first increasing and then decreasing,while the subsurface flow intensity of red soil citrus orchards was decreasing.(3)When the rainfall intensity was 60 mm/h,the total sediment yield of red soil citrus orange orchards was 3.74 times that of the calcareous soil citrus orchards,and when the rainfall intensity was 90 mm/h,the total sediment yield of the calcareous soil citrus orchards was 2.86 times that of red soil citrus orchards.During the rainfall process,the sediment yield of calcareous soil citrus orchards fluctuates sharply with the increase of rainfall duration,while the sediment yield of red soil citrus orchards was relatively small with the increase of rainfall duration.(4)When the rainfall intensity was more than 60 mm/h,there was a significant linear relationship between the cumulative sediment yield and cumulative runoff yield of calcareous soil and red soil orchards,and the greater the rainfall intensity,the more obvious the linear relationship was.The research results can provide reference and reasonable suggestions for the prevention and control of soil erosion in young citrus orchards on calcareous soil and red soil slopes in karst areas.关键词
石灰土/红壤/橘园/产流产沙/桂西北Key words
calcareous soil/red soil/citrus orchards/runoff and sediment yield/northwest Guangxi分类
农业科技引用本文复制引用
郑金德,潘焰菲,徐勤学,方荣杰,张帅普,付智勇..桂西北喀斯特区石灰土与红壤坡地幼龄橘园降雨侵蚀特征[J].水土保持学报,2023,37(6):11-17,7.基金项目
广西自然科学基金项目(2020GXNSFAA297093) （2020GXNSFAA297093）
广西重点研发计划项目(桂科 AB22035058) （桂科 AB22035058）
国家自然科学基金项目(51769005) （51769005）
