The critical period of apple tree growth in May and June, so fertilizing, high yield, high quality and good harvest!

From May to June, it has entered a critical stage of annual nutrient management for apple trees. Fertilization in this period can not only determine the yield and quality of apples in that year, but also have a close relationship and impact on the yield in the second year. According to the fertilizer demand characteristics of apple trees at this stage, providing sufficient nutrients for fruit trees will lay a solid foundation for improving fruit quality and increasing yield.

Don't forget to supplement calcium during the fruit expansion period!

From May to June, Apple's first task is to expand its young fruit. Since May, Apple has entered its first stage of young fruit expansion. At this time, the fruit has changed from nitrogen nutrition to sugar nutrition, which requires a large amount of nutrient water supply. If it is malnourished, it will lead to fruit drop and fruit cracking. Therefore, during the period of fruit expansion, it is necessary to ensure that there are enough water and nutrients to meet the physiological needs of fruit development, so that the fruit expands rapidly, the color is good, and the phenomenon of fruit drop and fruit cracking is reduced.

This stage is the peak of calcium absorption by fruit trees throughout the year, and the supplement of calcium fertilizer with high absorption and utilization rate is one of the key means to determine the quality of apple. There are three peaks of calcium requirement for fruit trees every year, the first at 20-30 days after flowering, the second during the fruit expansion period, and the third at 20-30 days before fruit harvest, during which the calcium absorbed can be used for the growth of fruit trees in the following spring. At this time, calcium fertilizer should be applied every 7 to 10 days. Timely calcium supplementation for fruit trees can effectively prevent young leaves from weakening, leaves losing green and yellowing, fruit sunken spots and pulp discoloration, softening, bitterness and so on, which can significantly improve fruit quality and yield.

Bitter pimples caused by calcium deficiency in apples

It is suggested that Bosheng plasma calcium should be used, especially by using low temperature plasma technology to open the calcium channel of crops, greatly improve the absorption and utilization of calcium, enhance the stress resistance of crops while replenishing calcium, and effectively enhance the resistance of crops to drought, salt injury, freezing injury, sunburn, diseases and insect pests.

Usage and suggestion: the foliar surface was evenly sprayed with water diluted 1500-2000 times, every 7-10 days, continuously sprayed 3-4 times. The concentration of calcium deficiency could be increased appropriately during the period of young fruit and fruit expansion. It is not recommended for extreme drought, heavy rain, frost and crop blooming. Closed orchards should be pruned to open the light path to promote calcium absorption.

Plasma boron fertilizer is indispensable!

The second task is the second peak of root growth. In the three stages of root growth of fruit trees, phosphorus is the key. Secondly, boron and calcium can stimulate the development of root system and promote the increase of root hair. The role of timely supplement of calcium fertilizer has been mentioned, at the same time, the appropriate supplement of adequate water-soluble phosphorus and boron and simultaneous stimulation of a variety of nutrient elements is not only the key to ensure root health, but also the key to determine the high yield of fruit trees.

Boron is a necessary nutrient element for the growth of fruit trees, although the dosage is small, but the effect is remarkable. The experiment shows that spraying boron fertilizer twice in flowering stage and young fruit stage of apple, pear, peach and grape respectively can increase the fruit setting rate by 1 to 4 times, and reduce the fruit shrinkage disease with high yield and good quality.

Bosheng plasma boron uses high-quality water-soluble polymeric sugar alcohol boron raw materials and low-temperature plasma patent technology, the effective ingredient is high, boron content up to 150 grams per liter, fully soluble in water, good mobility, high absorption rate, plants can be fully and effectively absorbed and utilized. Spraying on the leaves before flowering to after harvest can be stored in the branches of fruit trees; when fruit trees bloom, they can be transferred to flowers in time for flowering and fruit sitting.

Usage: it is recommended that the foliar should be evenly sprayed with water diluted 1500-2000 times, every 7-10 days, continuously spraying 3-4 times, and the dosage should be adjusted appropriately according to the growth of crops in each area.

In addition to boron supplementation, the leaf area of the third task of fruit trees increased during this period. In this period, a certain amount of nitrogen and magnesium are needed to ensure the quality of leaves, and a reasonable leaf-fruit ratio can ensure the yield of apples. Therefore, at this stage, it is the key to promote the thickness and reasonable area of leaves and to prevent some leaf diseases.

The fourth task is flower bud differentiation. From the first to the middle of May, the new growth of fruit trees gradually stopped growing, and began to enter the period of flower bud differentiation. At this stage, there must be sufficient nutrient supply and reasonable ratio of nitrogen, phosphorus and potassium in order to ensure the quantity and quality of flower buds of fruit trees. Phosphorus can promote flower formation, water-soluble available phosphorus is the key to promote flower formation; in addition, nitrogen is also an essential element for flower bud differentiation, nitrogen deficiency may increase the proportion of abnormal flowers; potassium can increase the activity of floral enzymes.

In addition, grasping the growth characteristics of fruit trees in this period, combined with Chongshuo high potassium fertilizer and high potassium rich and high potassium water soluble fertilizer will help to stimulate the growth of fruit trees. strengthen the synthesis and operation of enzymes for sugar, starch, protein, fat and various vitamins. It can stimulate the activity of polysaccharidase and convert polysaccharides into soluble monosaccharides so as to improve the sweetness and quality of fruits. Hope that the majority of growers according to the actual situation, scientific fertilization, fine management, I believe that there will be a bumper harvest season!