Nitrogen cycle model of agroecosystem in the karst region of Guizhou Province  

作　　者：CHEN Ye LIAN Bin 

机构地区：[1]School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550003, China [2]State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China

出　　处：《Chinese Journal Of Geochemistry》2010年第4期464-470,共7页中国地球化学学报

基　　金：Granted jointly by the Ministry of Science and Technology of China (Grant No. 2006CB403200);the National Natural Science Foundation of China (Grant No. 40773069)

摘　　要：According to the transport theory of soil solutes and the conditions of soil,geology and climate in the karst region of Guizhou Province,a numerical simulation model of edaphic nitrogen element transport under field conditions is initially established.In this model,NO-3 and NH+4 are regarded as soil solutes.Transformation mechanisms such as biological release,bio-immobilization,ammonium adsorption-desorption,nitration-denitrification and factors of crop root uptaking are considered in this model.It is hoped that the data from this model could directly be used to guide agricultural production in this region and offer feasible ways to improve the use of nitrogen element,sustainable development of agriculture in karst mountainous areas and natural environment.According to the transport theory of soil solutes and the conditions of soil,geology and climate in the karst region of Guizhou Province,a numerical simulation model of edaphic nitrogen element transport under field conditions is initially established.In this model,NO3^- and NH4^＋ are regarded as soil solutes.Transformation mechanisms such as biological release,bio-immobilization,ammonium adsorption-desorption,nitration-denitrification and factors of crop root uptaking are considered in this model.It is hoped that the data from this model could directly be used to guide agricultural production in this region and offer feasible ways to improve the use of nitrogen element,sustainable development of agriculture in karst mountainous areas and natural environment.

关 键 词：生态系统模型 农业生产 贵州省 喀斯特地区 土壤溶质运移 氮循环 农业可持续发展 反硝化作用 

分 类 号：S153.5[农业科学—土壤学] Q141[农业科学—农业基础科学]