DSSAT模型对豫西冬小麦保护性耕作效应模拟效果验证

来源 :干旱地区农业研究 | 被引量 : 0次 | 上传用户:wys9802110814
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
简要介绍了美国乔治亚大学组织开发的DSSATV4.5模型,并利用洛阳市孟津县2005-2006年冬小麦田间试验结果对模型的模拟结果进行验证及其适用性分析。通过对冬小麦叶面积指数、产量和农田土壤水分、水分利用效率的模拟与实测结果的对比分析,认为DSSAT模型的模拟效果较好。分析结果表明:模型对叶面积指数的模拟误差RMSE在0.034-0.076之间;模拟各处理的产量与水分利用效率也与实测值的关系基本一致;对各处理土壤体积含水量的RMSE误差在0.051-0.151之间。研究结果认为DSSAT模型在豫西应用的
其他文献
为了提升和保育辽西半干旱区农田土壤质量,采用盆栽试验的方式探讨了不同处理方式、不同用量玉米秸秆还田对土壤养分含量的影响。结果表明,秸秆还田后,其土壤含水量比对照组
The IEC 61131-3 standard defines a model and a set of programming languages for the development of industrial automation software. It is widely accepted by indu
In many real-time resource-constrained embedded systems, highly-predictable system behavior is a key design requirement. The “time-triggered co-operative” (TT
The notion of context provides flexibility and adaptation to cloud computing services. Location, time identity and activity of users are examples of primary con
This paper presents a novel decision-based fuzzy filter? based on support vector machines and Dempster-Shafer? evidence theory for effective noise suppression a
If the components in a component-based software system come from different sources, the characteristics of the components may be different. Therefore, evaluatin
As cloud computing continues to gain more momentum in the IT industry, more issues and challenges are being reported by academics and practitioners. In this pap
改革开放以来,在党中央的高度重视和直接领导下,广西的党校教育事业也随着改革开放的步伐不断向前发展。各地县级党校根据形势的要求和地方实际,在当地党委的领导下,创造性地工作
为了优化马铃薯生产过程中肥料养分管理和高效利用,于2011午在甘肃省定西市选择高钾肥力土壤布置大田试验,在等氮磷用量基础上,研究了施钾水平(0,120,240,360,480K20kg·hm-2)对马
Two computing approaches, based on linear and conic splines, are proposed here in reviewed and extended for vectorizing image outlines. Both of the approaches h