Multiple female flowers of litchi and longan regulate anther fertilizer

In the early stage of flower bud differentiation and development, litchi and longan differentiate and develop together in the same flower, and the sex of each flower is not determined until 20-25 days before flowering. The female-to-male ratio of flower panicle is affected by ambient temperature, nutritional status and hormone level. After years of observation and experiment, the author found that the following measures can increase the proportion of female flowers. 1. Spraying Yuhualing No. 2 when there are red spots in longan is rich in plant protein needed for flowering of fruit trees, which can timely supplement biological small molecular organic nutrition and start the expression of flowering factors of fruit trees. it can effectively promote the vegetative growth of fruit trees to transform into reproductive growth, provide sufficient nutrient accumulation for flower bud differentiation after spraying, promote female flower differentiation, increase the number of female flowers, and increase the proportion of female flowers. Usage of Yuhualing: 15-20 kg of water per bottle (80ml), sprayed on sunny days, wet to the back of leaves, not dripping. Second, control fertilizer and flowers, cultivate a strong and appropriate amount of flowers, increase the proportion of female flowers, control fertilizer and reduce flowers in the early stage, and increase fat and strong flowers in the later stage of ①. When awakening flower buds, the amount of fertilizer should be less, generally only 150 grams of fertilizer per meter crown diameter, can wake up the heading, with a small amount of fertilizer to control the number of flowers, generally 500 flowers per ear can be 1000. When the flower spike differentiates to the flower bud stage and the length of the flower ear has been decided, the organic fertilizer is applied to strengthen the flower. In the case of no greed, the application of nitrogen fertilizer can increase the proportion of female flowers, such as peanut bran retting liquid or chicken-duck manure liquid, 0.25 kg peanut bran per meter crown diameter can increase photosynthesis. In this way, there are more photosynthates per flower, which promotes the differentiation of female flowers and increases the number of female flowers. ② timely flower thinning to reduce the number of flowers to ensure that the photosynthate of each flower is sufficient. Due to the long time of growth and differentiation, the early flowering spike is particularly large, and the number of flowers is too large, which leads to excessive consumption of nutrients during flowering and increase the amount of fruit drop in the small fruit stage. What is more important is that there are many flowers, each flower gets very little from the only photosynthate, the organic nutrition is insufficient, the female flower is hypoplastic, and the female flower is less. Therefore, it is necessary to sparse the spike of large flowers into small ones, and keep 500 or 600 flowers per spike. When thinning flowers, remove the top of long branches, and remove too dense, too long, and too weak flowers. However, neither litchi nor longan can adopt the method of ear thinning, otherwise promoting summer buds will aggravate fruit drop.