The normal pumping of mango trees is in the middle or late February. However, if the winter temperatures are high and drought occurs for a long time, the spikes will be pumped earlier in the middle of January, and flowering will also advance accordingly. Basically, they will be easily affected before and after Qingming. Affected by low temperature and rainy weather, poor pollination and fertilization, poor fruit setting, and even fruitlessness. Therefore, for mango trees that have long drawn flower spikes, measures should be taken to delay flowering, promote flower spikes, increase resistance to low temperature and rain, and increase fruit setting rate. Specific management measures are as follows:
First, the removal of early flower spikes All flower spikes that are drawn before the beginning of spring, belong to early flowering spikes, flowering period will be before and after Qingming, in its withdrawal of about 5 to 10 cm, has not yet extended branches, it should be promptly from the base Its removal, prompting it to re-acquisition flower spikes, can achieve the purpose of delaying flowering. Generally, about 15 to 20 days after the flowering head is removed, the panicles can be re-extracted, and the panicles are short, the branches are numerous, the females are more, the flowering period is before and after the rain, the temperature rises, the sunshine is bright, the pollination is good, and the fruit set rate is high .
Second, early flowering before the early flowering flower ear consumption consumption of nutrients, in order to remove early flowering spikes can be timely and healthy spikes, must be early before the beginning of spring flowering fertilizer, with high quality organic fertilizer and high-efficiency phosphorus and potash fertilizer For trees above 10 years of age, 25 to 30 kilograms of livestock and poultry excrement are prepared for each plant, and superphosphate or calcium magnesium phosphate fertilizer is 3 to 4 kg, and potassium chloride or potassium sulfate is 1 to 2 kg. Dig 6 to 8 lengths of 80 to 100 cm in length, 15 to 20 cm in width, and 25 to 30 cm in depth. After spreading the various fertilizers evenly and uniformly, sprinkle them in the radiation channel and cover the fertilizer. .
3. Prevention and control of pests and diseases Mango trees are harvested early and are susceptible to pests such as anthracnose, aphids, scale insects, white moth, and red spiders. In particular, after the early flower spikes have been removed, wounds appear and are more susceptible to disease. Insect hazards. Must be sprayed with 1000-fold dichlorvos, 800-fold dipterex, 800-fold thiophanate-methyl, or 1,000-fold Lobsburn, 800-fold Radium-milder blends, or 1,000-fold farmland every 7 to 10 days. , 800 times the Schneider mixture, continuous spraying 2 to 3 times, evenly wet all the leaves and spikes, to start dropping drops of water is appropriate.
4. Spray foliar fertilizers to promote hair growth and promote flower buds, and spray foliar fertilizers on the basis of applying fertilizer before flowering. It is necessary to spray 0.1% magnesium sulfate once every 10 to 15 days. , 0.2% urea, 0.3% potassium dihydrogen phosphate, 1000 times triacontanol, 1500 times Shennongsu chelating fertilizer mixture, or 800 times fruit tree-specific high US organic humic acid active liquid fertilizer, continuous spray 3 ~ 5 Times, evenly spray all the leaves and spikes to start dropping.
Fifth, to protect the root system in order to make the roots have vigorous vitality in the early spring when the temperature is low and rainy, we must pay attention to the protection of the root system, after the application of fertilizer before the fertilizer, should be used in a timely manner with the decomposed garbage fertilizer, pond mud, fire soil or other soil Fertilizer applied to the top soil under the canopy, 25 cm to 30 cm from the canopy drip line inward to 40 to 50 cm away from the trunk, 80 to 100 kg per tree plant, about 8 to 10 cm thick, and then The dry and dry straw or other weeds are used to cover the tree tray, and the grass thickness is 5-6 cm to reduce the evaporation of water, fertilize the soil, raise the soil temperature, make the underground root system have a good living environment, and produce multiple new roots early. The future will be high-yield and high-quality.
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