降水格局变化和放牧对草地土壤磷转化影响的研究进展  

Advances in the Effects of Precipitation Pattern Change and Grazing on Soil Phosphorus Conversion in Grassland

作　　者：袁淑雅 贺晶[1] 苏德荣[1] YUAN Shu-ya;HE Jing;SU De-rong(Beijing Forestry University,Beijing 100091,China)

机构地区：[1]北京林业大学,北京100091

出　　处：《草地学报》2024年第1期25-36,共12页Acta Agrestia Sinica

基　　金：国家自然科学基金(32201335)资助。

摘　　要：草地是重要的陆地生态系统,其植物生产力可能会受到营养元素磷的限制。植物在生长发育过程中所需的磷主要来源于土壤,磷元素在土壤中的转化及其有效性受到诸多因素的影响。放牧作为草地常见的利用方式,可以通过影响土壤理化性质、土壤微生物及植物根系分泌物等作用于土壤磷转化过程。然而,在全球降水格局变化的背景下,土壤磷形态及其有效性会如何响应放牧利用,是近些年学者关注的重点问题。本文从土壤含水量、pH、土壤磷酸酶及根系分泌物等方面,总结了降水和放牧对草地土壤磷转化的影响。未来应从自然因素和人为干扰、生物和非生物、长时间和大尺度上多角度考虑降水变化和放牧利用对草地土壤磷转化的影响,以期更好地理解草地土壤磷循环以及在降水格局变化背景下为草地恢复提供参考依据。Grassland is a crucial terrestrial ecosystem,and phosphorus availability can limit its plant productivity.Phosphorus is obtained by plants primarily from soil,and its transformation and availability is influenced by various factors.Grazing,a common practice in grasslands,can impact soil phosphorus conversion by altering soil physical and chemical properties,soil microorganisms,and plant root exudates.However,with changing global precipitation patterns,how grazing and land utilization affect soil phosphorus conversion and availability has gained attention among researchers.This paper provided a review of the effects of precipitation and grazing on soil phosphorus conversion in grasslands,focusing on factors such as soil moisture content,pH,soil phosphatase activity,and root exudates,additionally,the responses of soil phosphorus conversion to grazing with different precipitation levels.In the future,studying the effects of precipitation changes and grazing utilization on soil phosphorus transformation in grasslands requires to consider multiple perspectives,such as natural factors and human disturbances,biological and abiotic interactions,and long-term and large-scale effects.This holistic approach will enhance our understanding of the soil phosphorus cycle in grasslands and provide valuable insights for grassland restoration in the face of changing precipitation patterns.

关 键 词：草地 降水格局 放牧 土壤磷转化 

分 类 号：S821.43[农业科学—畜牧学]