生态学杂志2024，Vol.43Issue(8)：2345-2353,9.DOI:10.13292/j.1000-4890.202408.007
重庆城郊紫色土小流域草地入渗特征
Infiltration characteristics of grassland in small watershed of purple soil in suburban Chongqing
摘要
Abstract
To understand the effects of root system on the infiltration capacity of grasslands in a purple soil water-shed,we conducted a one-dimensional infiltration experiment with four common herbaceous plants(Torilis scabra,Youngia japonica,Lolium multiflorum,and Sinosenecio oldhamianus)in suburb Chongqing.The relationship be-tween the characteristics of plant root structure and the infiltration capacity of root-soil complex was examined,and the Kostiakov,Mezencev,Horton,and Phillip infiltration models were used to simulate the infiltration process.The results showed that the infiltration processes of root-soil complex and rootless soil decreased sharply at first and then decreased slowly until stable.The stable infiltration rate of root-soil complex increased by 1.35-2.96 times com-pared with that of rootless soil.The infiltration rate of fibrous root-soil complex was higher than that of taproot-soil complex.Sinosenecio oldhamianus performed better in improving the infiltration performance of purple soil.Root length density,root surface area density,and root volume fractal dimension were significantly positively correlated with the initial,stable,average,and cumulative infiltration rates of the root-soil complex(P＜0.01).However,there was no significant correlation(P＞0.05)between root volume density and soil initial infiltration rate,root weight density and stable infiltration rate.The Mezencev model was the most suitable to characterize the infiltration of root-soil complex of the four herbaceous species and rootless soil(R2=0.99),followed by Kostiakov model,Horton model,and Philip model.Moreover,the Kostiakov,Philip,and Horton models performed better in simula-ting the infiltration of taproot-soil complex than that of fibrous root-soil complex.The results can provide a scientific basis for slope vegetation construction and soil erosion prevention in purple soil areas.关键词
重庆城郊/紫色土/小流域/草地/壤质土/土壤入渗Key words
suburban Chongqing/purple soil/small watershed/grassland/loamy soil/soil infiltration引用本文复制引用
刘春红,韦杰,肖晰文,苟俊菲,甘凤玲,唐瑶,薄纯悦..重庆城郊紫色土小流域草地入渗特征[J].生态学杂志,2024,43(8):2345-2353,9.基金项目
国家自然科学基金项目(42107355)、重庆市杰出青年科学基金(cstc2019jcyjjqX0025)、重庆市基础研究与前沿探索项目(cstc2018jcyjAX0489)和四川省科技计划项目(2020YFQ0002)资助. （42107355）
