| Associated soil aggregate nutrients and controlling factors on aggregate stability in semiarid grassland under different grazing prohibition timeframes |
| Dongdong Liu1; Wenliang Ju2,3,4; Xiaolian Jin1
|
| 2021
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| 发表期刊 | Science of the Total Environment
 |
| 卷号 | 777期号:1页码:1-11 |
| 摘要 | Grazingprohibitionisaneffectivemeasureinimprovingsoilstabilityandecologicalquality.However,onlyalim-
itednumberofstudieshavebeenpublishedonthedominantfactorsthatimpactsoilaggregatestabilityandtheir
associated effects on nutrient distribution for different size soil aggregates under long-term grazing prohibition
management. In this study, we investigated variation in soil aggregate stability and nutrient distribution charac-
teristics in semiarid grassland sites under different grazing prohibition timeframes (0 years [GP0], 11 years
[GP11], 26 years [GP26], and 36 years [GP36]). Results showed that organic carbon (C) and total nitrogen (TN)
concentrations in soil aggregates decreased at GP11 before progressively increasing and reaching its highest
value atGP36,andthetotal phosphorus (TP)concentration didnot change significantly.Most nutrients accumu-
lated in macroaggregates (> 0.25 mm) under grazing prohibition, and the nutrient stoichiometry in soil aggre-
gates increased after 26 years. Compared to the control (GP0), the mean weight diameter (MWD) value of the
soil stability index increased at GP11 (21.7%) and decreased at GP26 (18.9%). Attenuated total reflection Fourier
transform infrared spectroscopy (ATR-FTIR) also showed that the proportion of stable organic C-related func-
tional groups (i.e., alkene-C and aromatic-C) in macroaggregates were higher at GP11 and GP36 than at GP26.
Furthermore,principalcomponentanalysis(PCA),partialleastsquarespath modeling(PLS-PM),andtherelative
importanceofregressorsallshowedthatglomalin-relatedsoilproteins(GRSP)andnutrientsindirectlyimprovedaggregate stability in semiarid grassland through their influence on the GRSP accumulation potential and nutri-
ent stoichiometry. Generally, after 26 years grazing prohibition had a positive effect on soil aggregate stability
and nutrient accumulation inthesemiaridgrasslandsitesinvestigatedfor this study. Resultsfromthis studypro-
videatheoreticalbasistoselectappropriategrazingprohibition timeframesundergrasslandmanagementinitia-
tives to optimize ecological quality measures in semiarid regions. |
| 收录类别 | 中文核心期刊要目总览
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| 语种 | 英语
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| 文献类型 | 期刊论文
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| 条目标识符 | sbir.nwafu.edu.cn/handle/361005/10547
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| 专题 | 水保所知识产出(1956---)
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| 作者单位 | 1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Natural Resources and Environment
2.Institute of Soil and Water Conservation, Chinese Academy of Sciences, Ministry of Water Resources
3.University of Chinese Academy of Sciences
4.School of Environment, Tsinghua University
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推荐引用方式
GB/T 7714 |
Dongdong Liu,Wenliang Ju,Xiaolian Jin. Associated soil aggregate nutrients and controlling factors on aggregate stability in semiarid grassland under different grazing prohibition timeframes[J]. Science of the Total Environment,2021,777(1):1-11.
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| APA |
Dongdong Liu,Wenliang Ju,&Xiaolian Jin.(2021).Associated soil aggregate nutrients and controlling factors on aggregate stability in semiarid grassland under different grazing prohibition timeframes.Science of the Total Environment,777(1),1-11.
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| MLA |
Dongdong Liu,et al."Associated soil aggregate nutrients and controlling factors on aggregate stability in semiarid grassland under different grazing prohibition timeframes".Science of the Total Environment 777.1(2021):1-11.
|
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