Changes of Leaf Nutrients and Soil Properties of Pyrus bretschneideri Rehd.‘Pingguoli’ Under Reduced Fertilization

Pingguoli’was used as the test material,and four treatments were set,CK （no fertilization）,CF1 (1kg·plant^-1),CF2 (3kg·plant^-1),and CF3 (5kg·plant^-1).The Pearson correlation analysis method was used,the effects of reduced fertilization on leaf nutrients and soil properties of‘Pingguoli’were studied,in order to provide reference for rational fertilization of‘Pingguoli’in Yanbian area.The results showed that reduced fertilization within a reasonable range could increase the chlorophyll content of leaves,and the nutrient content was still in the normal range;the P content in‘Pingguoli’leaves was significantly positively correlated with the N and K contents,and significantly negatively correlated with the Ca and Mg contents.There was a significant positive correlation between N content and K content,a very significant negative correlation with Ca content,a significant negative correlation between Ca content and K content,and a very significant positive correlation with Mg content.Reduced fertilization could significantly reduce the input of chemical fertilizers,effectively improve the soil properties of the orchard,increase the activity of soil enzymes,which was conducive to improving the soil microenvironment,and had no adverse effect on the growth of trees.Comprehensive analysis showed that CF1 had the best effect and could be promoted in actual production.