How to prevent cracking and drying of Jujube trees in Young stage

In Yining County, jujube trees have been developed in a large area. When there is heavy snow in winter, when the snow melts in spring, the trunk below the snow line (about 20 cm high) is soaked by snow water, blown by the wind, and rotten and fried skin. as a result, the tree transport tissue was blocked and withered and died, resulting in heavy losses. If the fruit growers want to develop, they are worried about cracking and draining their skin. In recent years, when building a new jujube garden, we have adopted the method of bandaging and protecting it with plastic film at an early age, and the effect is good.

First, reasons

1. Climatic factors: Yining County has superior climatic conditions, with ≥ 10 ℃ annual accumulated temperature of 3400 ℃, sunshine hours of 2800 hours, annual rainfall of no more than 600mm, frost-free period of 168days, and the maximum snow thickness of about 27cm in January.

2. Variety factors: the main varieties cultivated in our county are Zanhuang jujube and pear jujube. Through the investigation of different varieties, the damage degree of the two varieties is basically the same.

3. Topography and soil factors: according to a number of investigations, it is found that the snow melts quickly and early in spring in jujube orchards with high topography and good ventilation and light transmission, the ground does not form ice, and the trunk does not explode, but the jujube orchards built in low-lying, moist and tuyere places explode the cortex about 20 centimeters below the snow line every year, causing the trees to dry up and die because the transport tissue is finally broken, and stubble is carried out every year after the beginning of spring. Re-branch, blossom and bear fruit, in some years the fruit can not mature, seriously affecting the economic income of fruit farmers.

II. Measures

1. Strengthen the field management of jujube orchard: pruning and pruning in time to cultivate strong trees. The key is to spray (insecticide) white on the ground and tree trunks in the garden in autumn. Prevent floating dust from laying eggs to harm the tree trunk.

2. Adopt plastic film dressing measures: before snowing in winter, wrap the trunk with plastic film (cut the film into strips 3 centimeters wide and 1 meter long). 25-30 centimeters above the ground must be wound tightly to prevent the bark from soaking when the snow melts. The effect of film spraying (fungicide) is very good in spring when the snow melts. This method is used continuously for 2 years in the young tree stage, and after the tree age enters 3 years, the trunk cortex thickens and ages. When it has the ability of self-protection, the phenomenon of exploding skin will not occur again.

3. Summary: in the past, in order to prevent the phenomenon of trunk cracking in jujube orchard, the method of winding and protection with flax grass and waste cloth was adopted, and the effect was not good. The method of burying soil was easy to cause broken branches and split, resulting in lack of rows and broken trees in jujube orchard. Since the promotion of plastic film bandaging protection technology in 2002, jujube orchard has developed rapidly.