Planting should pay attention to the allocation of pollination trees: When developing walnuts, most people will ignore the problem of allocation of pollination trees, which is one of the main reasons for the current low walnut production. Walnut flower buds are divided into females and males. The flowering time of female and male flowers of the same species is often inconsistent, generally differing by 6-7 days, and the longest difference is nearly 10 days, resulting in a rare flowering period, so walnuts are very serious. It has been observed that some varieties of male flowers are opened first, and some varieties of female flowers are opened first. If more than two varieties are planted in the same garden, the problem of fruit set-up due to poor flowering time can be solved.
The planting point should not be too small: After the walnuts are planted, they have to grow in the garden for nearly 100 years. Therefore, the tree pit must be dug to a length, width and depth of 111 meters. When the soil is backfilled, the depth of 20 cm in the bottom of the tree pit is the lowest. Internal application of 25 kg of organic fertilizer. Digging a large planting hole is very conducive to root growth and development. The application of organic fertilizer inside the hole can lead the root system to deeper growth and enhance the cold resistance and drought resistance of the tree. At present, the cultivation of walnut planting holes only digging length, width and depth of 0.50.50.5 meters or using machinery to open 50-60 centimeters of ditch is undesirable, because planting walnuts is not only to live, it is important to let its results, and early Results, multiple results, good results, long-term results. In particular, digging the small planting hole in the clay is one of the important causes of the roots, yellow leaves, and dead trees of the young walnut trees. Therefore, planting auricles rather big, not small, through the digging and planting holes to achieve the purpose of improving the soil, but also laid the foundation for future high yield.
The selection of fine varieties: The results of walnuts are determined as soon as possible, quality is good or bad, and high yield traits are mainly determined. The history of planting walnuts in the suburbs of Beijing mostly uses seed breeding. The results usually begin 7-8 years after planting. The current Academy of Agricultural Sciences and tertiary institutions have selected and bred a number of fine varieties and adopted grafting to cultivate seedlings, which can maintain the characteristics of good varieties well, but the selling price is often 2-3 times that of seedlings. At present, the market still has the phenomenon of shoddy sales. Some fruit farmers do not know the truth, and they still do not produce results after 5-6 years of purchase. Therefore, the development of walnut cultivation must choose good varieties. It is recommended to use fine varieties such as Zhonglin System, Liao Nuclear System, Jinlong Series, thin shell incense and gift walnuts.
Broken root roots: The main root of walnut seedlings is particularly developed, while the lateral roots are very weak and resemble radish. In order to promote the growth of lateral roots, the main root must be cut off before planting, and the lateral fibrous roots must be protected to prevent loss of water and dryness. Otherwise, the survival of seedlings will be affected. The best method is to excavate the seedlings in time for planting, transport the seedlings when the roots are muddy, and soak the roots for 12-24 hours before planting to make the plants fully absorb water. The best condition is to soak in the rooting powder water. This is to increase the seedlings. Effective measure of survival rate.
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