Combining field data and modeling to better understand maize growth response to phosphorus(P) fertilizer application and soil P dynamics in calcareous soils  

作　　者：Weina Zhang Zhigan Zhao Di He Junhe Liu Haigang Li Enli Wang 

机构地区：[1]School of Biological and Food Processing Engineering,Huanghuai University,Zhumadian 463000,China [2]Key Laboratory of Plant-Soil Interactions,Ministry of Education/College of Resources and Environmental Sciences,China Agricultural University,Beijing 100193,China [3]Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resources/Key Laboratory of Grassland Resource(IMAU),Ministry of Education/College of Grassland,Resources and Environment,Inner Mongolia Agricultural University,Hohhot 010018,China [4]CSIRO Agriculture and Food,Canberra,ACT 2601,Australia

出　　处：《Journal of Integrative Agriculture》2024年第3期1006-1021,共16页农业科学学报（英文版）

基　　金：funded by the National Natural Science Program of China(2022YFD1900300);the China Scholarship Council(CSC)through the CSC-CSIRO(Commonwealth Scientific and Industrial Research Organisation)Joint Ph D Program,the Zhumadian Major Scientific and Technological Innovation Project,China(170109564016);the Huanghuai University Scientific Research Foundation,China(502310020017)。

摘　　要：We used field experimental data to evaluate the ability of the agricultural production system model (APSIM) to simulate soil P availability,maize biomass and grain yield in response to P fertilizer applications on a fluvo-aquic soil in the North China Plain.Crop and soil data from a 2-year experiment with three P fertilizer application rates(0,75 and 300 kg P_(2)O_(5) ha^(–1)) were used to calibrate the model.Sensitivity analysis was carried out to investigate the influence of APSIM SoilP parameters on the simulated P availability in soil and maize growth.Crop and soil P parameters were then derived by matching or relating the simulation results to observed crop biomass,yield,P uptake and Olsen-P in soil.The re-parameterized model was further validated against 2 years of independent data at the same sites.The re-parameterized model enabled good simulation of the maize leaf area index (LAI),biomass,grain yield,P uptake,and grain P content in response to different levels of P additions against both the calibration and validation datasets.Our results showed that APSIM needs to be re-parameterized for simulation of maize LAI dynamics through modification of leaf size curve and a reduction in the rate of leaf senescence for modern staygreen maize cultivars in China.The P concentration limits (maximum and minimum P concentrations in organs)at different stages also need to be adjusted.Our results further showed a curvilinear relationship between the measured Olsen-P concentration and simulated labile P content,which could facilitate the initialization of APSIM P pools in the NCP with Olsen-P measurements in future studies.It remains difficult to parameterize the APSIM SoilP module due to the conceptual nature of the pools and simplified conceptualization of key P transformation processes.A fundamental understanding still needs to be developed for modelling and predicting the fate of applied P fertilizers in soils with contrasting physical and chemical characteristics.

关 键 词：MAIZE phosphorus availability modeling APSIM maize APSIM SoilP 

分 类 号：S513[农业科学—作物学]