Global patterns of soil phosphatase responses to nitrogen and phosphorus fertilization  

作　　者：Xiaomei GOU Yongqing REN Xin QIN Xiaorong WEI Jingjing WANG 

机构地区：[1]State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,the Research Center of Soil and Water Conservation and Ecological Environment,Chinese Academy of Sciences and Ministry of Education,Yangling 712100,China [2]Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100,China [3]River and Lake Management Office,Shaanxi Provincial Department of Water Resources,Xi'an 710004,China [4]College of Natural Resources and Environment,Northwest A&F University,Yangling 712100,China [5]University of Chinese Academy of Sciences,Beijing 100049,China [6]CAS Center for Excellence in Quaternary Science and Global Change,Xi'an 710061,China

出　　处：《Pedosphere》2024年第1期200-210,共11页土壤圈（英文版）

基　　金：financial support from the Strategic Priority Research Program of Chinese Academy of Sciences(Nos.XDA23070202 and XDB40020000);the National Natural Science Foundation of China(Nos.41977068 and 41977105);the Programs of Chinese Academy of Sciences(No.QYZDB-SSW-DQC039)。

摘　　要：Hydrolysis of organic phosphorus(P) by soil phosphatases is an important process of P cycling in terrestrial ecosystems, significantly affected by nitrogen(N) and/or P fertilization. However, how soil acid phosphatase(ACP) and alkaline phosphatase(ALP) activities respond to N and/or P fertilization and how these responses vary with climatic regions, ecosystem types, and fertilization management remain unclear. This knowledge gap hinders our ability to assess P cycling and availability from a global perspective. We performed a meta-analysis to evaluate the global patterns of soil ACP and ALP activities in response to N and/or P addition. We also examined how climatic regions(arctic to tropical), ecosystem types(cropland, grassland, and forest), and fertilization management(experiment duration and fertilizer type and application rate) affected changes in soil phosphatases after fertilization. It was shown that N fertilizer resulted in 10.1% ± 2.9% increase in soil ACP activity but a minimal effect on soil ALP activity. In contrast, P fertilizer resulted in 7.7% ± 2.6% decrease in soil ACP activity but a small increase in soil ALP activity. The responses of soil ACP and ALP activities to N and/or P fertilization were largely consistent across climatic regions but varied with ecosystem types and fertilization management, and the effects of ecosystem types and fertilization management were enzyme-dependent. Random forest analysis identified climate(mean annual precipitation and temperature) and change in soil pH as the key factors explaining variations in soil ACP and ALP activities. Therefore, N input and ecosystem types should be explicitly disentangled when assessing terrestrial P cycling.

关 键 词：acid phosphatase alkaline phosphatase ecosystem type fertilization management META-ANALYSIS phosphorus cycling phosphorus limitation 

分 类 号：S154.2[农业科学—土壤学]