Litchi should apply flower-promoting fertilizer before and after "Lesser Cold"
As far as the annual phenological period of litchi is concerned, bud differentiation is generally from November to January of the following year, at this time, it is necessary to promote flower fertilization of litchi. It is mainly to enhance the nutrition of trees before flowering, promote flower bud differentiation, form healthy flower ears and improve fruit setting. The fertilization period of flower promotion fertilizer is generally 10-20 days before flower bud differentiation. The flower bud differentiation of litchi "Nuomici" in Dongguan County, Guangdong Province occurred from December 15 to January 5. Therefore, the flower promotion fertilizer should be applied from November 25 to December 25; the flower bud differentiation of "Zhuangyuanhong" litchi in Fuzhou City of Fujian Province began from October 11 to November 20, and the flower promotion fertilizer should be applied from October 22 to November 10; the flower bud differentiation time of "Lanzhu" litchi in Zhangzhou City was from the middle of October to the middle of February of the next year. Because it is difficult to master the flower bud differentiation period of different varieties and different regions, it is generally suitable for early maturing varieties to apply fertilizer around the early cold in January, and late maturing varieties should apply fertilizer around the late cold in January. The type of fertilizer Late-acting fertilizer and quick-acting fertilizer, farm manure and chemical fertilizer are combined, usually 50~100 kg of decomposed human manure is applied to each plant, and 0.25-0.5 kg of nitrogen fertilizer is applied.
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Technical measures for flower and fruit protection of litchi
1. Strong flowers and flower protection. (1) Timely application of strong flower fertilizer. Strong flower fertilizer is generally applied when flower buds are seen (also known as flower fertilization). Fertilization depends on the amount of flowers and tree vigor, generally 50 kg per fruit tree surface, apply 1 kg compound fertilizer plus urea 0.2~0.5 kg, or urea, calcium superphosphate, potassium chloride each 0...
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There is a good way to control litchi fruit borer.
There are several kinds of litchi fruit borer pests, such as litchi special-shaped small roll moth, litchi gray moth, Spodoptera litchi and litchi stem borer, etc. The damage of litchi begins to occur at the beginning of flowering every year, and the damage is the most serious from the end of April to the beginning of June. The larvae first bite through the shell of the young fruit, then eat into the fruit and feed on the core, resulting in a large number of fruit drop, resulting in reduced yield and fruit quality.
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