文献类型：期刊文献

英文题名：Soil phosphorus budget in global grasslands and implications for management

作者：Zhou, Quanlai[1,2] Daryanto, Stefani[2] Xin, Zhiming[3] Liu, Zhimin[1] Liu, Minghu[3] Cui, Xue[4] Wang, Lixin[2]

第一作者：Zhou, Quanlai

通信作者：Wang, L[1]

机构：[1]Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China;[2]IUPUI, Dept Earth Sci, 723 W Michigan St SL118, Indianapolis, IN 46202 USA;[3]Chinese Acad Forestry, Expt Ctr Desert Forestry, Dengkou 015200, Inner Mongolia, Peoples R China;[4]Prevent & Quarantine Bureau Forestry Pest Liaonin, Shenyang 110036, Liaoning Proven, Peoples R China

年份：2017

卷号：144

起止页码：224-235

外文期刊名：JOURNAL OF ARID ENVIRONMENTS

收录：;Scopus(收录号：2-s2.0-85018626959);WOS:【SCI-EXPANDED(收录号:WOS:000403999100023)】；

基金：This research is supported by the National Natural Science Foundation of China (Grant no. 3080016), the overseas studying program of Chinese Academy Sciences, and LW acknowledges partial support from the U.S. Department of Agriculture (2014-51130-22492) and Schlumberger Foundation Faculty for the Future fellowship for SD.

语种：英文

外文关键词：Dryland; Environmental risk monitoring; Erosion; Grazing; Leaching; Runoff

摘要：Grasslands, accounting for one third of the world terrestrial land surface, are important in determining phosphorus (P) cycle at a global scale. Understanding the impacts of management on P inputs and outputs in grassland ecosystem is crucial for environmental management since a large amount of P is transported through rivers and groundwater and detained by the sea reservoir every year. To better understand P cycle in global grasslands, we mapped the distribution of different grassland types around the world and calculated the corresponding P inputs and outputs for each grassland type using data from literature. The distribution map of P input and output revealed a non-equilibrium condition in many grassland ecosystems, with: (i) a greater extent of input than output in most managed grasslands, but (ii) a more balanced amount between input and output in the majority of natural grasslands. Based on the mass balance between P input and output, we developed a framework to achieve sustainable P management in grasslands and discussed the measures targeting a more balanced P budget. Greater challenge is usually found in heavily-managed than natural grasslands to establish the optimum amount of P for grass and livestock production while minimizing the adverse impacts on surface waters. This study provided a comprehensive assessment of P budget in global grasslands and such information will be critical in determining the appropriate P management measures for various grassland types across the globe. (C) 2017 Elsevier Ltd. All rights reserved.