应用生态学报2011，Vol.22Issue(8)：2075-2083,9.
基于DSSAT模型的吉林省黑土作物-土壤氮循环和土壤有机碳平衡
Crop-soil nitrogen cycling and soil organic carbon balance in black soil zone of Jilin Province based on DSSAT model.
摘要
Abstract
By using the CERES-Maize crop model and Century soil model in Decision Support System of Agrotechnology. Transfer (DSSAT) model, this paper studied the effects of crop management parameters, fertilizer N application rate, soil initial N supply, and crop residue application on the maize growth, crop-soil N cycling, and soil organic C and N ecological balance in black soil (Molli-sol) zone of Jilin Province, Northeast China. Taking 12000-15000 kg · hm-2 as the target yield of maize, the optimum N application rate was 200-240 kg N · hm-2. Under this fertilization, the aboveground part N uptake was 250-290 kg N · hm-2, among which, 120-140 kg N · hm-2 came from soil, and 130-150 kg N · hm-2 came from fertilizer. Increasing the N application rate (250-420 kg N · hm-2) induced an obvious increase of soil residual N (63-183 kg · hm-2); delaying the N topdressing date also induced the increase of the residual N. When the crop residue application exceeded 6000 kg · hm-2, the soil active organic C and N could maintain the supply/demand balance during maize growth season. To achieve the target maize yield and maintain the ecological balance of soil organic C and N in black soil zone of Jilin Province, the chemical N application rate would be controlled in the range of 200-240 kg N · hm-2, topdressing N should be at proper date, and the application amount of crop residue would be up to 6000 kg · hm-2.关键词
DSSAT模型/土壤氮循环/敏感性分析/作物氮吸收Key words
DSSAT model/ soil nitrogen cycling/ sensitivity analysis/ crop nitrogen uptake分类
农业科技引用本文复制引用
杨靖民,窦森,杨靖一,GerritHOOGENBOOM,姜旭,张忠庆,姜洪威,贾丽慧..基于DSSAT模型的吉林省黑土作物-土壤氮循环和土壤有机碳平衡[J].应用生态学报,2011,22(8):2075-2083,9.基金项目
国家基础研究发展计划重点项目(2011CB100503)、国家自然科学基金项目(40871107,40971141)和中国科学院知识创新工程项目(K2CX2-YW-Q1-07)资助. （2011CB100503）
