农业环境科学学报Issue(9)：1782-1790,9.DOI:10.11654/jaes.2014.09.016
应用DNDC模型模拟关中地区农田长期施肥条件下土壤碳含量及作物产量
Simulation of Soil Carbon Contents and Crop Yields in Long-term Fertilized Cropland in Guanzhong Area Using DNDC Model
摘要
Abstract
Land use changes may have great impacts on dryland agriculture in the Loess Plateau of China, one of the most fragile agro-e-cosystems in the world. Here we investigated the variation of soil organic carbon(SOC)and crop yields in dryland under long-term different fertilization in Guanzhong plain area during 20 years using DNDC model. There were five treatments including no fertilization control(CK), inorganic fertilizers(NPK), NPK combined with straw(SNPK), NPK combined with low manure(M1NPK), and NPK combined with high manure(M2NPK). In the CK treatment, SOC and crop yields were significantly reduced. The NPK treatment promoted crop production, but had little effect on SOC, which was similar to that in CK. However, both SOC and crop yields were increased in the SNPK, M1NPK and M2NPK treatments, with the greatest effect observed in the M2NPK. These observed data were used to calibrate and verify DNDC model. The model showed good fitting to measured SOC and crop yields, and thus could be used to predict SOC and crop yields dynamics. The pre-diction by the model indicated that combination of inorganic fertilizers and manure could not only enhance crop aboveground and under-ground biomass and heterotrophic respiration, but also increase soil carbon storage. This result would shed light on fertilization practices in this region.关键词
DNDC模型/施肥/土壤有机碳/碳循环/作物产量Key words
DNDC model/fertilization/soil organic carbon/carbon cycling/crop yields分类
农业科技引用本文复制引用
陈海心,孙本华,冯浩,赵英,张延..应用DNDC模型模拟关中地区农田长期施肥条件下土壤碳含量及作物产量[J].农业环境科学学报,2014,(9):1782-1790,9.基金项目
国家863计划项目（2013AA102904）；国家自然科学基金项目（41001130）；高等学校学科创新引智计划资助 （）
