摘要
利用主成分分析法拟合了不同水分下限控制条件下温室甜瓜生长过程,并对该方法的通用性进行了验证。研究表明,利用表征作物长势的综合植株性状与有效积温建立Logstic经验模型,模型的决定系数均在0.9以上,模型的拟合精度较高。利用该模型拟合第3试验小区的甜瓜生长状况,观测值与拟合值的相对误差大部分处于10%之内。主成分分析既充分保留原始变量的信息量,又剔除了原变量之间的信息重叠部分,该方法在作物生长方程模拟中具有很好的实用性。
The development process of muskmelon in greenhouse with different water supply was simulated by principal component analysis,and the universal application of the model was tested.The results showed that the logistic model constructed with the comprehensive plant characteristics and effective accumulative temperature had very high precision with the determining coefficient above 0.9.The plant development process in the 3rd trial district was simulated with the model,and the relative error between measured value and fitted value was mostly among 10%.The principal component analysis model had pretty practicality in plant development process simulation with initial information existed fully,and repetition information deleted.
出处
《干旱地区农业研究》
CSCD
北大核心
2009年第6期134-138,共5页
Agricultural Research in the Arid Areas
基金
国家自然科学基金项目(50779059
50609022)
关键词
甜瓜
主成分分析
生长发育方程模型
综合植株性状
拟合精度
muskmelon
principal component analysis
plant development formula model
comprehensive plant characteristic
fitted precision
