摘要
本文采用新型的投影寻踪回归统计分析方法，对位于新疆天山北坡低山带５个草地亚型，在测定时段内的日均生长量与地形、土壤含水量、土温、气温、降水量、生长时期进行相关分析，以时段日均干草生长量为因变量，上述其它因素为自变量，建立ＰＰＲ回归模型，以此揭示植物生长与环境的客观关系，在对产量形成的环境解释研究方法上取得一定进展。
In the paper,by applying the new method of Projection Persuit Regression(PPR)statistics,fiverangeland subtypes in low一leveled moumtainous belt of northern slope of Tianshan Mountain Range inXinjiang,their yield measurement per day in each and every time period was analysed,the items for calcula-tion of correlation coefficient were as follows:topography,soil moisture,soil temperature,atmospheric temp-erature,rainfall,and various stages of growth and improvement and so on。We have made a PPR model to study on the relationship between plant growth and surrounding envi-ronments in which the daily yield of hay(on DM basis)in the time period of experimentation as dependentvariables and those other factors concerned as independent variables in statistics were calculated。Some certain progresses have been made toward environmental interpretation to yield formation。
出处
《草业学报》
CSCD
1994年第2期65-68,共4页
Acta Prataculturae Sinica
基金
国家自然科学基金
关键词
投影寻踪回归
草地
机理模型
产量
Projection Pursuit Regression (PPR), Rangeland subtype,Daily yield,Environment,Mecha-nism of modeling
