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[1]ZHU Jingbin,HE Huidan,LI Hongqin,et al.Characteristics of Soil Bulk Density and Soil Water-Holding Capacity in Alpine Meadow Under Grazing Gradients[J].Research of Soil and Water Conservation,2018,25(05):66-71.

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Characteristics of Soil Bulk Density and Soil Water-Holding Capacity in Alpine Meadow Under Grazing Gradients

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 05 Page number: 66-71 Column: Public date: 2018-09-06

Title:: Characteristics of Soil Bulk Density and Soil Water-Holding Capacity in Alpine Meadow Under Grazing Gradients

Author(s):: ZHU Jingbin^1,2, HE Huidan^1,2, LI Hongqin^1,3, YANG Yongsheng^1,3, WEI Yaxi^1,2, LUO Jin^1,2, LI Yingnian^1,3; 1. Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810001, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Key Laboratory of Adaptation and Evolution of Plateau Biota, Chinese Academy of Sciences, Xining 810001, China

Keywords:: grazing gradients; alpine meadow; soil density; water-holding capacity

CLC:: S152.7⁺1

DOI:: -

Abstract:: In order to study the effects of different grazing intensities on the soil water-holding capacity of alpine meadow. The alpine meadow in Qinghai Province under different grazing intensities (grazing exclusion (CK), light grazing (LG), moderate grazing (MG) and heavy grazing (HG)) were analyzed. It was found that moderate grazing could reduce soil bulk density, but grazing could increase soil density when exceeding a certain intensity. In addition, the influence of short-term grazing on soil bulk density was mainly reflected in soil surface. With the increase of soil depth, the soil density gradually increased. The soil saturated water holding capacity, capillary water holding capacity and field capacity of LG and MG were relatively large, while CK and HG were relatively small. Therefore, moderate grazing was beneficial to improve soil water holding capacity, while banning grazing and heavy grazing were not beneficial to improve soil water holding capacity. In addition, it could be seen that the water holding capacity gradually decreased with the increase of depth. The influence of short-term grazing on soil water-holding capacity was mainly reflected in soil surface. There was the significant positive correlation between soil saturated water holding capacity, capillary water holding capacity and field capacity (p < 0.01), which showed a consistent response to different grazing gradient. There was a significant negative correlation between soil density and water-holding capacity (p < 0.01). The underground biomass and soil organic matter had a weak positive correlation with soil water-holding capacity. The above results indicate that moderate grazing can increase the soil water holding capacity to some extent and it is favorable to grassland restoration.

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