Fruit trees have many fertilization methods, each with its own advantages and disadvantages. The deep pit is covered by the fertilization method, that is, the deep pit is dug in the tree tray, the soil is not filled, the lid is added, and the organic fertilizer and fertilizer are applied in the pit. This method has many advantages and works well.
1. The advantages of deep pit cover fertilization method: First, less damage to the roots of fruit trees. According to the survey, this method reduces the root loss by more than 50% compared with the application. Second, the utilization rate is high. Deep pit fertilization, fertilizer in the deep layer and can penetrate into the surrounding soil, not only meet the needs of fruit tree growth, but also avoid fertilizer loss caused by shallow fertilization. The third is water storage and water conservation. There is no filling in the pit, the space is large, and the water and rainwater that can be poured in the ground can be accumulated in a large amount, which can play the role of water conservation and drought resistance, and is particularly effective for mountain orchards. In the dry water shortage, 50 kg of water is added to each deep pit to meet the growth needs of fruit trees. The fourth is to promote roots and strengthen the tree. The deep roots of the deep pits extend downwards, increasing the absorption area of ​​the roots and the firmness of the trees, strengthening the tree potential and enhancing the resistance of the trees. The fifth is to save labor and time, easy to use. It is not necessary to dig a pit every time. Sixth is a long time of action. A deep pit is generally fertilized for 2 to 3 years.
2. The specific practice of deep pit fertilization method: firstly digging four deep pits each 30~40cm long and 60~80cm deep on the ground perpendicular to the outer edge of the fruit tree, in order to avoid the time to slide the soil into the pit First, the organic fertilizer mixed with chemical fertilizer, such as chicken manure, cow dung, pig manure, etc., is filled in the bottom of the pit, and then the deep pit is filled with organic leaves, weeds, straw, etc., and then filled with water, and finally Add a lid to the upper mouth, for example, a weed with a cement bag is a lid. After 2~3 years, just re-dig a new pit in different directions according to the above method.
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