How to increase pollination rate
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The pollination rate of flowers and trees is closely related to the seed setting rate. Only by increasing the rate of pollination and fertilization can more seeds be obtained for reproduction. I. Factors influencing pollination and fertilization The factors influencing flower pollination and fertilization are mainly physiological, nutritional and environmental factors. 1. Physiological factors Some flowers and trees (such as Europe and the United States Li) due to self-incompatibility, resulting in self infertility; some tree species (such as ginkgo) exist dioecious phenomenon; some trees (such as cycad) dichogamous (ie, inconsistent flowering period ), caused by normal pollination; some tree species are triploid or pentaploid, can not form a large amount of pollen itself, leading to abortion. 2. The nutrient conditions, such as drought, soil infertility, etc., flower growth, aging trees, or flowers on weak branches, lack of protein, carbohydrates, minerals, and other nutrients, cause poor pollen germination, slow pollen tube elongation, and embryo sac development. Bad, eventually leading to abortion. 3. Environmental factors Flowering and pollination in the case of low temperature, high winds, drought and rain, not only limit the pollination of insects, but also easily lead to flower development, and even cause pollen and embryo sac dead in the middle. Second, technical measures to increase pollination rate of flowers and trees 1. The pollinating tree is configured to self-infertility in inflorescences, and a pollination tree is to be arranged at the time of cultivation. The pollinating tree must have the characteristics of strong affinity with the main flowers and plants, the same flowering period, and large amounts of pollen. 2. Artificial pollination on dioecious or flowering flowers (especially inconsistent flowering) can be solved by artificial pollination. First of all, the pre-cooked pollen should be collected, and after being dried, it should be wrapped and placed in a desiccator equipped with a hygroscopic agent (such as anhydrous calcium chloride). The desiccator is then stored at a low temperature of 0°C to 5°C (eg, a refrigerator), and artificial pollination is performed when the mature pollen matures. Some flowers have a great variation due to the structure of the flowers. Natural pollination is very difficult and artificial pollination is required to produce results. If the chrysanthemum cannot grow due to its long corolla, it is only after the corolla is cut short and artificial pollination is performed. Flowering insects that do not pollinate when they are cold, can only be solved by artificial pollination. 3. To release bees on a large area of ​​flowers and trees, through the release of bees can greatly speed up the pollination rate, and effectively improve the pollination and fertilization rate. 4. Fertilizer spraying a certain concentration of borax liquid fertilizer before germination and flowering period promotes pollen germination and pollination. For the debilitating trees, 0.3% to 0.5% urea liquid fertilizer or potassium dihydrogen phosphate liquid fertilizer is sprayed at the flowering stage to increase pollination fertilization rate. 5. Improve environmental conditions Strengthen management and protection, improve environmental conditions in a targeted manner, and increase the pollination rate of flowers and trees. It is difficult to pollinate by low temperature, and greenhouses can be increased by means of greenhouses, greenhouses, etc. It is the pollination rate caused by drought. It should be treated with watering, spraying, irrigation, etc.; it is caused by strong winds and low pollination rate. Plant windshield trees, parks, and move to windless places for management and protection.