Rehabilitation time has greater influences on soil mechanical composition and erodibility than does rehabilitation land type in the hilly-gully region of the Loess Plateau, China

doi:10.7717/peerj.8090

	Rehabilitation time has greater influences on soil mechanical composition and erodibility than does rehabilitation land type in the hilly-gully region of the Loess Plateau, China
	Qiao, Leilei 1; Chen, Wenjing 1,4; Wu, Yang 4; Liu, Hongfei 4; Zhang, Jiaoyang 2,3; Liu, Guobin 1,2; Xue, Sha 2,4,5
刊名	PEERJ
	2019-11-21
卷号	7 页码:23
关键词	Erosion Fractal dimension Loess Plateau Vegetation rehabilitation
ISSN号	2167-8359
DOI	10.7717/peerj.8090
通讯作者	Xue, Sha(xuesha100@163.com)
英文摘要	Background. The major landscape in the hilly-gully region of the Loess Plateau is greatly affected by vegetation rehabilitation on abandoned cropland. Although many studies have shown that the rehabilitation have greatly improved soil conditions and protected them from erosion, these effectiveness were not always in consensus possibly due to the land type of vegetation or to the rehabilitation time. To close this gap, we conducted a long term experiment as follows. Methods. In this study, we analysed four land types of vegetation rehabilitation (shrub land, woodland, naturally revegetated grassland, and orchard land) with different rehabilitation times and investigated the mechanical composition and erodibility of the soil. Areas of slope croplandand natural forest were selected as controls. Results. The results showed that soil depth, rehabilitation time and rehabilitation land type had strong impacts on soil mechanical composition, micro-aggregation and erodibility. Following rehabilitation, naturally revegetated grassland and shrub land had lower fractal dimensions of particle size distribution (fractal dimensions of PSD), fractal dimensions of micro-aggregation, and erodibility (K factor) than did cropland. Compared to the positive effects of rehabilitation mainly happened in the topsoil layer at other rehabilitation land type, that of woodland happened in the deeper soil layer. Besides, the indispensable rehabilitation time for the significant improvement of soil condition was shorter at naturally revegetated grassland than that at shrub land and woodland. Discussion. Although rehabilitation time was more influential than was rehabilitation land type or soil depth, the differences among the rehabilitation land types showed that naturally revegetated grassland with native plants is the most time-saving rehabilitation vegetation for the Loess Plateau in the conversion from slope cropland. The success of rehabilitation in this forestry practice was mainly contributed by the suited species of rehabilitation land type to the local climate and soil. Based on the differences of rehabilitation effectiveness resulting from land type, we should be cautious to choose land types for the rehabilitation of soil conditions in the Loess Plateau.
资助项目	National Key Research and Development Program of China[2016YFC0501707] ; Fund Project of Shaanxi Key Laboratory of Land Consolidation[2019-JC15] ; National Natural Science Foundation of China[41771557]
WOS关键词	PARTICLE-SIZE DISTRIBUTION ; FRACTAL FEATURES ; ORGANIC-CARBON ; MULTIFRACTAL CHARACTERISTICS ; CHEMICAL-PROPERTIES ; NATURAL VEGETATION ; RAINFALL INTENSITY ; NORTHERN CHINA ; EROSION ; CONSERVATION
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	PEERJ INC
WOS记录号	WOS:000498814900007
资助机构	National Key Research and Development Program of China ; Fund Project of Shaanxi Key Laboratory of Land Consolidation ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/130636]
专题	中国科学院地理科学与资源研究所
通讯作者	Xue, Sha
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Northwest A&F Univ, Coll Forestry, Yangling, Shaanxi, Peoples R China 5.Changan Univ, Shaanxi Key Lab Land Consolidat, Xian, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Qiao, Leilei,Chen, Wenjing,Wu, Yang,et al. Rehabilitation time has greater influences on soil mechanical composition and erodibility than does rehabilitation land type in the hilly-gully region of the Loess Plateau, China[J]. PEERJ,2019,7:23.
APA	Qiao, Leilei.,Chen, Wenjing.,Wu, Yang.,Liu, Hongfei.,Zhang, Jiaoyang.,...&Xue, Sha.(2019).Rehabilitation time has greater influences on soil mechanical composition and erodibility than does rehabilitation land type in the hilly-gully region of the Loess Plateau, China.PEERJ,7,23.
MLA	Qiao, Leilei,et al."Rehabilitation time has greater influences on soil mechanical composition and erodibility than does rehabilitation land type in the hilly-gully region of the Loess Plateau, China".PEERJ 7(2019):23.