First, to strengthen the management of soil and fertilizer water According to research, each harvest of 375 kilograms of walnuts absorbs 22 kilograms of pure nitrogen from the soil, indicating that walnut production requires more nitrogen. Lack of fertilizer and water is one of the main reasons for the low yield and poor quality of walnuts. The solution is as follows:

1. Shaving the tree plate will be serious water and soil loss, running water, running soil, running fat tree plate, built into a large fish scale pit outside the high and low, the same size and crown.

2, fertilization in June-July, each plant can effectively apply about 2 kilograms of nitrogen fertilizer, can also be cut near the vitex and grass pressing blue, about 100 kilograms per plant.

3, the tree plate covered grass with weeds, straw cover the tree plate, about 10-20 cm thick, both water, but also inhibit the growth of weeds.

Second, to strengthen the prevention and control of plant diseases and insect pests Walnut extremities moth (walnut black) occurs in mountainous areas. The following methods can be used to prevent walnut extremities:

One is to shave the trees in the soil before freezing in the late autumn and winter and freeze some of the overwintering larvae.

The second is to remove insects before August to reduce the population density of the next year.

Thirdly, spray 2000 times of deltamethrin or 2,500 times of kungfu solution every 10-15 days from mid-June to late July.

The fourth method is to use 75% phoxim plus 50 times finely mixed soil under the tree before the emergence of the adult, and then use it to kill the adult eclosion.
Third, a reasonable pruning At present, most of the walnut trees can not be pruned, let it grow naturally, canopy closure, through the poor light transmission, senescence of the inner litchi twigs, the resulting parts of the external shift, the output decreased. The pruning of adult walnut trees should grasp the principle of “going to large branches and vacating the place, digging up the sun through the branches, shrinking the periphery to increase new branches, and the short branches to increase the yield”.

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