Effects of biotic and abiotic factors on soil organic carbon in semi-arid grassland

文献类型： 外文期刊

第一作者： Tian, Fu-Ping

作者： Tian, Fu-Ping;Chang, Xiao-Feng;Zhang, Zhi-Nan;Chang, Xiao-Feng;Wu, Gao-Lin;Sun, Lei;Wei, Xue-Hong;Wu, Gao-Lin

作者机构：

期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.872； 五年影响因子：3.771 ）

ISSN： 0718-9516

年卷期： 2016 年 16 卷 4 期

页码：

收录情况： SCI

摘要： Carbon sequestration in grassland soil has been paid considerable attention in recent decades. However, the changes of soil organic carbon (SOC) still need clarification under the effect of environmental factors in semi-arid area. Here, twenty sampling sites were selected to study the effects of plant community (plant cover, biomass, litter, composition and diversity) and environmental factors (i.e. mean annual precipitation, mean annual temperature) on SOC sequestration in the semi-arid grasslands. The results showed that SOC was significant positively related to mean annual precipitation, soil water content and soil pH. The higher aboveand below-ground biomass, species evenness and diversity presented the higher SOC. Specially, the species richness and proportion of gramineous species functional group significantly increased SOC. Below-ground biomass affected SOC mainly in the top 30 cm soil. Our results suggest that higher plant species richness and gramineous species proportion play a positive role in increasing the potential of soil carbon sequestration in semi-arid grassland.

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