Analysis of the Non-correlation between Increasing Grain Yield and Increasing Farmer Income——Findings from Villages of Lingui and Xiangzhou Counties of Guangxi;

On the base of MV hedge ratio, this paper put forward the principle of future return and spot return matching, using nonlinear correlation parameter replace the linear one to improve the hedge ratio.

Result shows that the method is effective to discriminate linear and nonlinear correlation characteristics in a comparatively long data series,and suitable for analysis of complex ocean data.

To study the linear correlation coefficient and nonlinear correlation coefficient in statistics and find general character.

【Objective】 The study was to overcome the problem of linear correlation and information loss,and provide a new way of non-linear correlation analysis in different traits for breeding operator.