Impacts of Livestock Grazing on Vegetation Characteristics and Soil Chemical Properties of Alpine Meadows in the Eastern Qinghai-Tibetan Plateau

IF 1.3 4区 环境科学与生态学 Q3 ECOLOGY Ecoscience Pub Date : 2020-01-08 DOI:10.1080/11956860.2019.1710908
L. Ji, Yan Qin, S. O. Jimoh, Xiangyang Hou, N. Zhang, Youmin Gan, Yuan Luo
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引用次数: 13

Abstract

ABSTRACT Livestock grazing is one of the significant causes of land degradation. However, the effect of contrasting grazing intensities on soil properties and vegetation in the southeastern Qinghai-Tibetan Plateau (QTP) is poorly understood. We studied the impact of light grazing (LG), moderate grazing (MG), heavy grazing (HG) and no grazing (NG) on vegetation characteristics and the chemical properties of soil samples taken at 0–10 cm, 10–20 cm and 20–30 cm layers from the designated grazing treatments. A total of 42 species representing 32 genera and 16 families were identified. Our result shows that HG significantly reduced total aboveground biomass, vegetation cover, canopy average height, but increased unpalatable aboveground biomass. Soil organic matter declined with increasing grazing intensity and respectively decreased to 64.51%, 65.38% and 82.40% for LG, MG and HG compared to the NG treatment and soil carbon storage exhibited a similar pattern. Soil total nitrogen and phosphorus contents decreased with increasing soil depth, while soil total potassium was not affected by grazing across soil depths. We conclude that 1 yak would have a more severe impact than 3 sheep units on the vegetation community and soil characteristics of alpine meadows in the southeastern QTP.
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畜禽放牧对青藏高原东部高寒草甸植被特征及土壤化学性质的影响
畜牧业是土地退化的重要原因之一。然而,青藏高原东南部不同放牧强度对土壤性质和植被的影响尚不清楚。我们研究了轻度放牧(LG)、中度放牧(MG)、重度放牧(HG)和不放牧(NG)对指定放牧处理0–10 cm、10–20 cm和20–30 cm层土壤样本的植被特征和化学性质的影响。共鉴定出16科32属42种。结果表明,HG显著降低了地上总生物量、植被覆盖率、冠层平均高度,但增加了令人不快的地上生物量。土壤有机质随放牧强度的增加而下降,LG、MG和HG的有机质含量分别下降到64.51%、65.38%和82.40%,土壤碳储量表现出相似的模式。土壤总氮和磷含量随着土壤深度的增加而降低,而土壤总钾不受放牧影响。我们得出的结论是,1头牦牛对QTP东南部高山草甸的植被群落和土壤特征的影响比3头绵羊更严重。
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来源期刊
Ecoscience
Ecoscience 环境科学-生态学
CiteScore
2.80
自引率
0.00%
发文量
13
审稿时长
>36 weeks
期刊介绍: Écoscience, is a multidisciplinary journal that covers all aspects of ecology. The journal welcomes submissions in English or French and publishes original work focusing on patterns and processes at various temporal and spatial scales across different levels of biological organization. Articles include original research, brief communications and reviews.
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