Evaluating the effect of soil internal forces on the stability of natural soil aggregates during vegetation restoration

doi:10.1007/s11368-021-03011-z

	Evaluating the effect of soil internal forces on the stability of natural soil aggregates during vegetation restoration
	Ma, Rentian 1; Hu, Feinan 1,2; Liu, Jingfang 1; Zhao, Shiwei 1,2
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2021-07-03
页码	10
关键词	Aggregate stability Aggregate size distribution Ethanol Soil organic matter The Loess Plateau
ISSN号	1439-0108
DOI	10.1007/s11368-021-03011-z
通讯作者	Hu, Feinan(hufeinan-629@163.com)
英文摘要	Purpose Soil aggregate stability associates closely with many environmental and agricultural problems. Some studies using the model aggregates find that soil internal forces exert an important impact on soil aggregate stability. However, the effect of soil internal forces on the stability of natural soil aggregates during vegetation restoration has been little studied. Methods Five different succession stages (including farmland, grassland, shrubland, early forest, and climax forest) were chosen in the Ziwuling forest region (in the central part of the Loess Plateau, China), and the size distribution and stability of natural soil aggregates under different succession stages were investigated through dry sieving and wet sieving with ethanol and deionized water prewetting. Results The size distribution of aggregates determined by dry sieving showed decreased first and then increased with decreasing particle size, dominant sizes were 5-1- and < 0.15-mm fractions. The ethanol prewetting treatment showed a distribution similar to that determined by dry sieving. The size distribution of aggregates in deionized water prewetting treatment was mainly < 0.15-mm fractions. Moreover, the mean weight diameter values of farmland, grassland, shrubland, early forest, and climax forest soils determined in ethanol treatment (MWDe) were 4.62, 1.45, 1.31, 1.32, and 1.17 times than those in deionized water treatment (MWDw). In addition, in the fast wetting process, the preservation rate of soil aggregates was higher in 0.5-0.053-mm fractions than in > 0.5-mm fractions. The relative internal force index (RII) of grassland, shrubland, early forest, and climax forest soils decreased by 47%, 54%, 55%, and 64% compared with that of farmland soil, respectively. Conclusions These findings demonstrate that soil internal forces could significantly break down the aggregates and lead to decreasing water stability of aggregates. The vegetation restoration process decreased the repulsive soil internal forces, thereby decreasing the degree of disintegration of aggregates and consequently increased the water stability of aggregates.
资助项目	National Natural Science Foundation of China[41977024] ; National Natural Science Foundation of China[41601236] ; Fundamental Research Funds for the Central Universities[2452019078]
WOS关键词	CATION-EXCHANGE CAPACITY ; PARTICLE INTERACTION FORCES ; LAND-USE CHANGE ; ORGANIC-MATTER ; SURFACE-AREA ; LOESS PLATEAU ; CARBON ; IMPACT ; FRACTIONS ; COAGULATION
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000669271000001
资助机构	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/163755]
专题	中国科学院地理科学与资源研究所
通讯作者	Hu, Feinan
作者单位	1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Ma, Rentian,Hu, Feinan,Liu, Jingfang,et al. Evaluating the effect of soil internal forces on the stability of natural soil aggregates during vegetation restoration[J]. JOURNAL OF SOILS AND SEDIMENTS,2021:10.
APA	Ma, Rentian,Hu, Feinan,Liu, Jingfang,&Zhao, Shiwei.(2021).Evaluating the effect of soil internal forces on the stability of natural soil aggregates during vegetation restoration.JOURNAL OF SOILS AND SEDIMENTS,10.
MLA	Ma, Rentian,et al."Evaluating the effect of soil internal forces on the stability of natural soil aggregates during vegetation restoration".JOURNAL OF SOILS AND SEDIMENTS (2021):10.