After the fruit trees are harvested, they are re-applied to "monthly sub-fertilizers"

After fruit trees are swollen during the later period, the tree nutrient consumption is empty after harvest. Especially late-maturing apples, if the base fertilizer is not applied in sufficient time after harvesting, the tree's storage and nutrition are seriously deficient, not only the winter and spring rot diseases multiply, but also have serious effects on the flowering, fruit setting and young fruit cell formation in the next year. Cause inflorescence is not strong, fruit set rate is low, young fruit head is small, thin and thin new shoots, extended nutrient conversion period.

The fruit growers vividly called autumn basal fat “monthly child fat”. Just like a woman’s pregnancy in October, once she had a childbirth, she was diligent, and her nutrient was depleted. She had to supplement her nutrition in a timely manner to ensure her mother’s health.

Autumn basal fertilization is related to the supply of nutrients in the fruit tree cycle, and should be time-sensitive, rational, and scientific.

The fertilization time is usually from September to October. The demand of N, P, and K nutrients for different fruit trees is proportional to the demand. Organic fertilizers should also be added to supplement the appropriate trace elements. The fertilization method should be fertilization or hole application. The site is on the inside of the outer edge of the canopy; the depth of fertilization is usually concentrated in the root distribution of 20-40 cm. The root project requires the outer projection of the tree crown to dig a shallow ditch, generally 1.5 to 2 meters long, 0.4 meters wide and 0.4 meters deep. Fertilization in autumn can increase fruit setting rate by 8% to 10% compared with spring and winter fertilization and increase yield.

10% to 15%.

Not only that, there are other benefits of fertilizing in the fall.

First of all, the nutrients consumed during fruit sprouting from early spring to flowering and fruit setting are mainly nutrients stored in the tree in the previous year. The best period for accumulating nutrients is the period from fruit harvesting to defoliation. Autumn base fertilizer can increase the nutrient reserve of the tree body.

Secondly, autumn is the last peak of growth in the root system in one year. It has a strong vitality and strong ability to absorb nutrients. It is also conducive to delaying leaf senescence, enhancing the photosynthetic capacity of autumn leaves and increasing the nutrient reserve of the tree.

In addition, the soil temperature in autumn is higher and the soil moisture is better, which is conducive to soil microbial activity. The applied organic fertilizer is quickly cooked and easily absorbed and utilized by the root system. Studies have shown that fertilization in autumn can increase the nitrogen, phosphorus, potassium, calcium, and magnesium fertility by 1x, 5x, 3x, 2x, and 2x, respectively.

Finally, autumn fertilization can improve the root growth environment and improve the stress resistance of the tree. Combined with autumn fertilization and deep-turning soil, the soil structure can be optimized, and the soil permeability conditions can be improved, which will facilitate the growth of roots and respiration, and increase the ability of the soil to retain water and fertilizer and prevent overwintering.

The use of basal fertilisers in autumn, basal fertilization in winter, and basal fertilization in spring are all the same costs of money and labor from purchasing fertilizer to fertilizing, but the effects of fertilization received are quite different. Therefore, many experts and professors call for the use of basal fertilisers for fruit trees in the autumn as "gold", winter basal fertilization as "silver", and spring basal fertilization as "broken iron and iron."

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