The relationships between land use and soil conditions in the hilly area of the loess plateau in northern Shaanxi, China
The relationships between land use and soil conditions in the hilly area of the loess plateau in northern Shaanxi, China
复制标题
DOI：
10.1016/s0341-8162(99)00084-3
复制
发表时间：
2000-02-28
期刊：
影响因子：
6.2
通讯作者：
Wang, J
中科院分区：
文献类型：
--
作者：
Fu, BJ;Chen, LD;Wang, J
土地利用不当是造成黄土丘陵区土壤侵蚀和养分流失的主要原因之一。在具有典型丘陵沟壑地貌的阳卷沟流域，从总流域、样带和土地利用类型3个空间尺度，研究了土地利用变化对土壤侵蚀的影响以及土壤养分和水分的分布。1984年至1996年间，森林和草地分别增加了36%和5%，坡耕地减少了43%。土地利用变化使年土壤侵蚀量减少24%。土壤表层(0~20 cm)全N、全P、速效N、速效P和有机质含量以及0~70 cm土壤水分含量表明，从山脚到山顶的农田/草地/林地利用结构比其他土地利用结构具有更好的保土保肥能力。土壤养分含量由高到低依次为森林草地坡耕地，土壤水分含量依次为森林草地坡耕地。(C)2000 Elsevier Science B.V.保留所有权利。
Inappropriate land use is one of the main reasons for soil erosion and nutrient loss in the hilly loess area. In the Yangjuangou catchment, which has typical hill and gully topography, the effects of land use changes on soil erosion and the distribution of soil nutrients and moisture were studied at the three spatial scales of total catchment, transect and land use type. Between 1984 and 1996, forest and grassland increased by 36% and 5%, respectively, and slope farmland decreased by 43%. The land use changes decreased annual soil erosion by 24%. The amounts of total N, total P, available N, available P and organic matter of surface soil (0-20 cm) and of moisture in the 0-70 cm soil suggest that a farmland/grassland/forest land use structure from hill foot to hill top has a better capacity for soil conservation and retention of nutrients than other land use structures. The contents of soil nutrients are in the order forest > grassland > slope farmland, and those of soil water are forest < grassland < slope farmland. (C) 2000 Elsevier Science B.V. All rights reserved.