【摘要】 CMDSSN是以CERES模型中的氮素平衡子程序为基础,面向对象的程序设计方法为手段建立的辅助用户氮肥决策的计算机软件应用系统。它可以模拟土壤有机物质和作物残留的周转过程,也可以模拟尿素和硝态氮的水解和氮素的损失。在实际生产中可以辅助氮肥施用决策、评价施肥方案、动态显示土壤中硝态氮和铵态氮变化趋势。最后选取了河北农业大学教学试验基地2002-2003年的试验数据对CMDSSN进行了验证。结果表明,系统在模拟土壤硝态氮、铵态氮含量及动态变化方面与实测值拟和较好。更多还原

【Abstract】 CMDSSN was a kind of application system of computer software which was used to assistant people decision-making of nitrogen fertilization , which was build basing on subprogram of nitrogen element balance of CERES model and by means of Object- oriented programming.CMDSSN could simulate circulation process of soil organic matter and crop leftover as well as simulate hydrolyzation of carbamide and NO3--N and alse simulate nitrogen losing.CMDSSN might assist decision-making of nitrogen fertilization, appraise fertilization scheme and show dynamical change trend of NO3--N and NH4+-N of soil in practical production.The CMDSSN result has been validated with the experimented data, which completed in Hebei Agriculture university teaching-trial base in 2002-2003. The results suggested that system could simulated dynamical change trend of NO3--N and NH4+-N of soil and forecasted amount of NO3--N and NNH4+-N .更多还原