1. Uneven fertilization
Some fruit farmers have no suitable nutrient ratio for fertilizers, such as long-term use of urea, potassium sulfate and other fertilizers. It causes the soil to become dry and hard, reduces soil permeability, affects the roots' breathing, and weakens the nutrient absorption capacity. Moreover, in order to increase the yield and promote early maturity, a large amount of nitrogen fertilizer is applied, which leads to the apple tree being long, and only the flowering is not fruitful, which aggravates the rotten root of the apple tree. Pay attention to the combination of elements, not a single fertilization, especially trace elements, the lack of trace elements can cause fruit trees to easily produce physiological diseases.
2. Improper use of farmyard manure
Fruit farmers like to use farmyard manure, which has low cost and good results, but many people do not have the correct method of application. Farmyard manure should be fully fermented before it can be applied to the orchard. If there is no decomposed farmyard manure, a large amount of heat will be generated, and the roots cannot withstand high temperatures, resulting in rotten roots. Moreover, the heat generated by the farmyard manure during the decomposing process will kill the bacteria that are lurking in it, so if it is not decomposed, it will cause a large number of germs and other harmful substances in the soil. It has a more serious impact on the growth and development of the roots.
3, fertilization time
Many fruit farmers fertilize their time according to their own mood and want to apply it. In fact, this seriously hindered the growth of fruit trees. The roots lacked nutrients and could not provide enough nutrients for growth. In fact, there are requirements for topdressing during the planting process, especially during the period after harvesting. The harvest is generally in the autumn, and the base fertilizer should be applied after harvesting, because the nutrition of the fruit trees is concentrated in the fruit, and the fruit trees are in an extremely weak state. If the fruit trees are not supplemented in time, the fruit trees are prone to freezing damage when they are wintering.
4, the soil is not suitable
When farmers grow, they usually ignore the management of the orchard soil. There is no cultivating work on the soil, and weeding is also the use of pesticides. There is no soft soil, which enhances the permeability of the soil, and the soil is in a closed and dry state for a long time. The roots of the fruit trees can only gradually extend to the upper part of the soil, resulting in a slight lack of water or water, which will damage the roots. The roots are unable to breathe, the fruit trees lack nutrient supply, the tree is gradually weakened and a large number of leaves are roots.
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