新品种粤糖03-373蔗产量影响因素的多元回归分析

对早熟高糖新品种粤糖03-373产量及构成因子进行了相关、多元回归和通径分析。相关分析结果表明,蔗茎产量与有效茎数、茎长和茎径都呈极显著相关,与有效茎数关系最为密切;多元回归分析和通径分析结果表明,有效茎数对蔗茎产量的贡献最大,其次是茎长,茎径最小。3个因素对蔗茎产量的多元回归方程为y=-2.8713+1.5497x1+5.8990x2-395.4294x3(R=0.9672**)。有效茎数和茎长是粤糖03-373获得高产的主要因素和重要因素,该品种属于茎数型品种,栽培上应发挥其茎数优势,兼顾茎长(株高),达到增产目的。

Multiple Regression Analysis of Influencing Factors on Yield of New Sugarcane Variety Yuetang03-373

The relationship between cane yield and its components factors of new sugarcane variety Yuetang03-373 were studied with correlation,multiple regression and path analysis.Correlation among yield and its components revealed extremely significant correlation and the relationship between yield and millable stalk was the most significant.Multiple regression and path analysis showed that the contribution of millable stalk to the cane yield was the most,fowllowed by stalk length and that of stalk diameter was the least;Besides,multiple regression equation of the cane yield and its component factors was y=-2.8713+1.5497x1+5.8990x2-395.4294x3(R=0.9672**).Consequently,millable stalk and stalk length were both the most important factors of cane yield for Yuetang03-373,which was classified as the sugarcane variety of millable stalk type.And so,in cultivation,it should be considered to develop the advantage of this variety in many millable stalks,taking account of stalk length(plant height),to in increase the cane yield,sucrose and income.