Effect of soil organic nutrition matter on yield and quality of Fuji apple

The relationships between three kinds of soil organic nutritions (organic acids, monosaccharides and B vitamins) and the quality of Fuji apple were studied using field investigation and laboratory analysis. The correlations between soil organic nutritions and quality of the apples were evaluated by the methods of correlation and path analyses. The results show that the soil arabinose, nicotinamide and citric acid are very significantly correlated with the fruit organic acid content, and the correlation coefficients are 0.621, 0.648 and 0.587, respectively The path coefficients are large between the arabinose (1.123), citric acid（0.668）, vitamin B2（0.757）and the fruit soluble sugar content， and they are the main positive impacts on soluble sugar content, while the soil oxalic acid content has negative (－0.558) impact on it. The direct path coefficients from ribose and rhamnose to fruit anthocyanins are 0.706 and 0.644, and the acetic acid and oxalic acid have negative impacts on the formation of anthocyanin, the path coefficients are －0.765 and －0.664. The content of fruit vitamin C is extremely and positively correlated with the three types of organic soil nutritions， and the coefficients of correlations between soluble solids and tartaric acid and vitamin B6 content are 0.682 and 0.613. The contents of soil carbohydrates shows a negative correlation with fruit firmness size and a significant positive correlation with the size of the fruits. The arabinose, ribose, vitamin B2 and lactic acid are the main factors affecting fruit yield.