Before the grapes are harvested into the fallen leaves, it is a key management period that is easily overlooked by people. At this stage, there will be a second peak in photosynthesis of the leaves (the first time in the second half after germination to the growth stage of the leaves), and it will decline rapidly in the period close to the deciduous period. Therefore, we must pay attention to this critical period after harvest, strengthen management, protect leaves and protect leaves, and increase the storage of photosynthetic products. If the management of the late tree is neglected, it will lead to premature leaf damage, reduced photosynthesis, and tree nutrient deficit, which will make the early spring lack of nutrients, germination will be late but not neat, even the inflorescence will degenerate, the flowering result will be reduced, and the result will be less Or not result, but also easily lead to the second year of foliage, poor flower bud differentiation, thus affecting the results of the third year.
Protecting the leaves after harvesting and harvesting leaves and enhancing the photosynthetic capacity of the leaves play an important role in increasing the storage nutrients of the tree. In the late stage of growth, pesticides used for the withdrawal of bacteriocin and sulfur are strictly controlled to prevent premature leaf aging and reduce photosynthetic intensity. Under normal circumstances, in addition to the giant peaks, the fruit should be used as little as possible after harvesting, or no old leaves should be used. When harvesting the fruits, pay attention to reduce damage to the leaves.
After the fruit is harvested, the fertilization method applies the basal fertilizer as early as possible after the fruit is harvested. When the results are numerous and the tree vigor is weak, the available nitrogen fertilizer can be applied to enhance the photosynthesis of the later leaves and restore the tree vigor.
Basal fertilizer is suitable for autumn, because at this time the peak of root growth, root healing, cutting off all the fine roots, can play a role in root pruning, can promote many new roots in the year, early next spring can absorb large amounts of soil Nutrient substances. In the autumn, the growth organs of the above-ground shoots have gradually ceased growth. The nutrient substances absorbed are mainly storage and accumulation, which can increase the nutrient level of the tree. It is conducive to flower bud differentiation and enhancement of overwintering ability in the year, which is conducive to budding in the coming year, further formation of flower buds and new shoots after flowering. Early growth. Due to the high nutrient level of the tree and the good quality of flower buds, it can increase fruit setting rate and promote cell division of young fruit. The number of cells in a single fruit is more. To lay the foundation for high yields for the coming year.
Basal time of basal application combined with the weather conditions in Hubei, September is the most appropriate. The temperature dropped late in the middle of October or late in the evening was not conducive to root absorption. Basal fertilizer is mainly composed of basal fertilizer, with phosphate fertilizer applied, Mushi organic fertilizer (farm fertilizer) is about 3,000 kg, and phosphate fertilizer is 50 kg.
Pest control is very important for pest control after harvesting. In particular, downy mildew, powdery mildew, and insect dust fly dust can cause premature defoliation of whole trees, forcing winter buds to germinate in late autumn, severely affecting tree nutrient accumulation and the results of growth in the coming year. Post-disease control. In general, spraying 300 times of aluminum alginate or 1,000 times of thaloxins every 10 days before harvest to fall leaves can effectively prevent the occurrence of downy mildew. Use 1,000 times omethoate to prevent floating dust.
Strengthening post-management centered on photosynthesis is very important for ensuring the production and quality of grapes for consecutive years.
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