In November, the cold air increased southward, and the temperature difference between day and night became more obvious. The fruit citrus tree entered the key period of fruit management and flower bud physiological differentiation. Controlling flowers and improving fruit commerciality was the focus of this period. The management of saplings mainly focuses on promoting winter maturing and inhibiting flower bud differentiation.
　　
Winter shoot management
Hanging fruit tree
1 If the top batch is not mature, the nutritional competition of the fruit is still continuing. Usually the fruit is small and the chance of winter shoots is relatively small. Therefore, the primary purpose is to promote the early maturity and timely supplement nutrition. It can spray 800 times of phosphorus potassium source library + sea elf bio-stimulant (foliar type) 800 times liquid. If the temperature is high in the later stage, spray the paclobutrazol to prevent winter shoots.
2 According to past experience, the rain is sufficient in November. When the temperature rises, the fruit is less, the nutrition is too strong, and the tree is likely to send out the winter shoots.
The germination and growth of winter shoots will affect the accumulation of nutrients in the autumn shoots, breaking the balance of endogenous hormones (such as increased gibberellin content), which is not conducive to flower bud differentiation.
In general, a small amount of winter shoots are taken from the tops of the tree, which is irrelevant, but there are a number of measures that need to be taken. The winter shoots were able to be extracted. The weather conditions at that time were definitely suitable for their growth. The eradication and pruning were not very recommended. Generally, the more the more the more nutritious, the nutrients of the tree would be transferred to the wound and destroy the nutrition. balance.
Sapling
1 If the winter shoots are more and more neat, mainly to enhance nutrition, promote ripening and antifreeze. The water and fertilizer can be increased, and the phosphorus and potassium source pool + sea elf bio-stimulating agent (root type) can be applied, and the leaf surface can be sprayed with 800 times of the phosphorus potassium source library.
2 If the winter shoots are sporadic, you can not process them for a while, and then cut them off when the spring shoots.
Flower bud differentiation
Hanging fruit tree
November is the late stage of physiological differentiation of flower buds. In order to maintain a stable level of nutrition, it is necessary to supplement nutrients in a timely and appropriate manner. Foliar sprayed phosphorus and potassium source library 800 times liquid + boron, zinc fertilizer, etc.
Sapling
This month is a key period to inhibit the flower bud differentiation of young trees. The sapling flowering not only hinders the spring shoots, but also affects the tree potential, which is extremely unfavorable to the expansion of the canopy.
It can spray gibberellin 100~200ppm, forcing young trees to maintain vegetative growth advantage, and ensure that the orchard has sufficient water supply and at the same time add some high-nitrogen fertilizer.
Enhance fruit commodity
The commerciality of the fruit mainly includes the appearance and the inner two parts. Specifically, the focus of this month is coloring and one is sweetening. Whether it is sweetening or coloring, the sugar accumulation of the fruit is the most important.
The main measures include balancing the nutrition of the tree body, spraying the phosphorus and potassium source pool + amino acid foliar fertilizer + medium and trace element fertilizer before and after the color change. For plants with too weak tree fruit, the sea snail biostimulator can be added in an appropriate amount. Type).
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