《农业科学与工程前沿（英文）》 >> 2019年 第6卷 第4期 doi: 10.15302/J-FASE-2019280
Strategies for improving fertilizer phosphorus use efficiency in Chinese cropping systems
. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.. College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.. Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.. College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.. College of Resources and Environmental Sciences, Yunnan Agricultural University, kunming 650201, China.. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China录用日期 ： 2019-10-16 发布日期 ：2019-10-16
A four-year project, entitled “The mechanisms of fraction transformation and high use efficiency of P fertilizer in Chinese cropping systems” commenced in 2017. The project was established to answer three key questions and looked at 17 cropping systems on ten soils. First, we asked what are the dynamics of transformation, fixation and mobilization of P fertilizers in soil-cropping systems? Second, what are the mechanisms of soil-crop-microbe interactions by which P fertilizer can be efficiently used? Third, how to manipulate the processes of P use in cropping systems? The targets of this project are (1) to explore the mechanisms of P fixation, the pathways of loss of P availability and the threshold of migration of fertilizer P in the field; (2) to uncover mechanisms by which soil legacy P is mobilized through root physiological and morphological processes and through arbuscular mycorrhizal fungi and P-solubilizing bacteria in rhizosphere and hyphosphere; (3) to estimate the biological potential of crops for high efficiency P absorption and use; (4) to innovate new approaches for improving the efficiency of P fertilizers. The outcomes will provide theoretical support for setting standards for limitation of P fertilizer application rate in the main cropping zones of China.