Low Yielded Reasons of Plum and ways to Deal with Situations

Key words: 
• plum /
• low production forest improvement /
• field managements

Abstract: This Paper servayed the low yielded reasons of Plum and tested the ways to deal with situations, with results showing as follows: 1, fruitless trees and low yielded trees almost accounted for two-thirds of the total trees in the Plum orchard, high yielded trees only 29.01%; 2, imperfect flowers,as high as 45.58%, caused the low rate of fruitage, with the average being 7.12% in 4 years; 3, Plum bloomed in early spring, during which the temperature was too low and the sunlight was limited and the rainfall days were too many, which were not good for the pollinating and fertilizing, and frequent cold waves damaged the flowers and they young fruits. The test showed that the potantiality of the Plum was great. Some ways to deal with situations, such as field management, disease control, prevention from the early leave fallen and pruning, could reduce the fruitless trees and could improve the product per tree, and could increase the yield per hectare by 1.5 times. The yield was as much 1.5 times as contrast one by using the optimum set on the high position graft.