Because of its high nutritional value and medicinal value, walnut is also known as longevity fruit. For example, in the Song Dynasty Ma Zhi, "Kai Bao Materia Medica" records that eating walnut fruit can prevent depression and other diseases. In the actual planting process, due to some reasons, the walnuts have some big problems or a lot of fruit drop phenomenon. Therefore, today Xiaobian talks about the causes and preventive measures that cause the walnuts to fail or fall. First, the possible cause of walnuts not fruitful or fruit drop 1, external temperature reasons Although walnuts are currently grown in various places, they are mostly in the north. Walnut blooms in April of each year. Although it is spring, the temperature changes are still very large. It often has a cold spring phenomenon. The temperature suddenly drops, which has a great influence on the flowering period of the walnut and the fertilization of the pollen. Walnut falls without fruit 2, the cause of wind (1) The wind plays an important role in the pollen fertilization of walnut. The pollination of normal walnut is done by the medium of wind. Therefore, the temperature is suitable during this time. The wind speed and air volume meet the requirements of pollen fertilization, which can promote It fully pollinates and reduces the phenomenon that walnut flowers are less fruitless. If the wind blows continuously during this period, the wind will be too strong and the air volume will be too large, which will have a negative impact, so that the walnut can not effectively pollinate and fertilize, and the phenomenon of fruitlessness and fruit drop will increase. (2) In many areas of the north, there will be relatively harsh sandstorms during this time, which will not only inhibit the pollination of walnuts, but also have a much higher transpiration capacity than normal, which can easily lead to serious water shortage. In this case, the walnuts become malnourished, lack nutrients, and increase the phenomenon of flowerless fruit. 3. Cultivation technology is backward On the whole, China's agriculture, especially the planting industry, is developing very well under the support and support of the government. Many fruit trees are slowly being developed in the direction of standardization and scale. However, when planting walnuts in some places, it relies on past experience or the experience of planting other fruit trees before, so that the healthy growth of walnuts is curbed, resulting in low yield of walnuts and greatly reducing the economic benefits of farmers. Second, measures to prevent the phenomenon of walnut fruit drop 1. Strengthen technical management training for rural forest farmers (1) Adopt scientific methods to cultivate and manage, and provide technical training for planters. For example, regular seminars on relevant technical issues, free distribution of relevant technical materials, establishment of technology sites and establishment of planting groups in the local area. (2) For the old fruit farmers who rely on past experience, according to the actual situation in the region, the past experience summarized by the forest farmers will be verified on the spot to promote reasonable and effective planting experience or technology. 2. Reasonable use of pesticides and timely prevention of pests and diseases (1) In the process of cultivating walnuts, pay close attention to the prevention of pests and diseases, timely prevention and treatment. (2) For the phenomenon of pests and diseases, if it is necessary to use pesticides for prevention and control, it is necessary to understand the use and dosage of pesticides, and use them in combination with actual conditions. 3, scientific cold protection Pay attention to the changes in the weather when pollinating the walnuts. When the temperature difference between the weather changes is large, take measures to prevent cold in the trees. In addition, you can consult relevant experts and look at the information in this area to find a suitable method for your own science. 4, planting windbreaks In the orchard, some trees, shrubs and other wind-blocking trees are planted, and the distance between each wind-proof tree and the walnut tree is reasonably controlled to avoid mutual influence. Uv absorbers are the most widely used light stabilizers, which can be divided into salicylate, benzophenone, benzotriazole, substituted acrylonitrile and triazines according to their structure. The most widely used light stabilizers are benzophenone and benzotriazole in industry. Quench agent is mainly metal complex, such as divalent nickel complex, and often used with ultraviolet absorber, play a synergistic effect. Imported Premium Uv Absorber,Latest Biochemical Synthesis,Premium Phenyl Salicylate,Value-Added Plastic Solutions Xingbang High Molecular Materials Co., Ltd. , https://www.chemicaladditive.com
