水土保持通报2025，Vol.45Issue(4)：62-70,9.DOI:10.13961/j.cnki.stbctb.2025.04.015
皖西大别山典型土地利用类型坡面产流产沙与氮磷流失特征
Characteristics of runoff and sediment yield,and nitrogen and phosphorus loss on slopes undergoing typical land-use in Dabie Mountain of western Anhui Province
摘要
Abstract
[Objective]The effects of runoff scouring under different slope gradients and land use types on slope runoff,sediment yield,and nitrogen(N)and phosphorus(P)losses were analyzed,in order to provide theoretical support for soil and water conservation in Dabie Mountain region of western Anhui Province,China.[Methods]Field in situ scouring experiments were conducted on 15° and 20° slopes undergoing typical land-use types(bare land,grassland,tea garden,forest land and bamboo forest)in the Jiangzihe small watershed,Huoshan County,Anhui Province.Considering the frequent heavy rainfall in the region,a scouring flow rate of 9 L/min was applied to analyze the responses of runoff,sediment yield and nutrient losses to land-use types and slope gradients.[Results]① During the scouring process,the stabilized average runoff rate on the 15° slopes was in the following order:bare land>tea garden>grassland>forest land>bamboo forest,whereas the sediment yield rate on the 20° slopes were ranked as follows:bare land>grassland>tea garden>forest land>bamboo forest.Compared to the 15° slopes,the runoff rate on the 20° slopes increased significantly only for bare land,with negligible changes in other land-use types.At a stabilized sediment yield,the sediment yield rate of the 20° slopes was slightly higher than that of the 15° slopes,with both exhibiting the following order:bare land>tea garden>grassland>bamboo forest>forest land.② Total N(TN)and total P(TP)losses on the 20° slopes were marginally higher than those on the 15° slopes.Under the same slope gradient,TN and TP losses showed the following pattern:tea garden>bare land>bamboo forest>grassland>forest land.③ Throughout the scouring process,runoff predominantly contributed to TN loss,whereas sediment played a more significant role in TP loss.[Conclusion]Expanding area of bamboo forest cover in the Dabie Mountains of western Anhui Province can effectively enhance water conservation and soil retention.Additionally,tea gardens should be prioritized for non-point source pollution management to mitigate the losses of nutrients,such as N and P.关键词
皖西大别山/冲刷试验/坡面产流产沙/养分流失Key words
Dabie Mountain/western Anhui Province/scouring test/slope runoff/sediment yield/nutrient loss分类
农业科技引用本文复制引用
张艺,田昌园,汪文,李嘉宁,汪军红,张晓霞,查同刚..皖西大别山典型土地利用类型坡面产流产沙与氮磷流失特征[J].水土保持通报,2025,45(4):62-70,9.基金项目
国家重点研发计划项目"基于物质流分析的小流域多要素空间格局优化技术"(2022YFF130300204) （2022YFF130300204）
