Balanced fertilization of fruit trees with formulas for soil testing is important for satisfying the demand of fruit trees for various elements of fertilizers. It is an important fertilization method for reducing the occurrence of fruit tree deficiency syndromes and ensuring the complete nutrition of fruit trees.
On March 12th, an agronomist at the soil testing and fertilizer application station in Baoji City, Shaanxi Province, told reporters in an interview that the broad masses of fruit growers should pay attention to the following six points when carrying out balanced soil fertigation for fruit trees:
1. Fruit trees absorb nutrients from relatively fixed soil. Therefore, it is necessary to quantitatively replenish nutrients due to trees. The type of supplemental nutrients and the amount of supplements should be based on the current nutrient content in the soil, the lack of nutrients in the soil, and the nutrient elements and planned production of the tree.
2. Antagonism exists between nutrient elements, so the ratio between nutrient elements has an effect on the growth of fruit trees. If the amount of nutrient elements is relatively large and the ratio is imbalanced, the nutrient elements are often not fully utilized, resulting in the waste of a certain nutrient element or the occurrence of a deficiency syndrome. When fertilizing, attention should be paid to the proportion of various nutrient elements.
3. Pay attention to the effect of soil factors on the use of nutrient elements. Soil environmental factors include organic matter, pH, etc. Organic matter can play a role in improving the soil, balancing elements, and increasing fertility. PH value is the main factor affecting the effectiveness of mineral nutrients.
4. Pay attention to the input of organic fertilizer. Every gram of orchard base fertilizer should be applied at least 5,000 kg of high-quality farmyard fertilizer, and it should be mixed with phosphate fertilizer after fermentation. Can also be taken to shred straw, wheat straw and other objects to cover, or a kind of clover and other green manure plants, through the measures of mowing and pressing, increase soil organic matter content, and enhance the soil to maintain fertilizer and water storage capacity.
5. Fertilize according to the soil nutrient value and according to the growth potential of the tree. For excessive growth of trees, control the amount of nitrogen fertilizer; for the trees with weaker growth, the amount of nitrogen fertilizer should be increased; for orchards with low potassium, the proportion of potassium fertilizer should be increased; for orchards with low phosphorus content, the amount of phosphate fertilizer should be increased appropriately. .
6. Pay attention to the fertilization area and fertilization depth. The soil fertilization should not be too close to the trunk. The absorption roots of the trees around the trunk are less. The applied fertilizer is not easy to be absorbed by the tree and it is easy to burn roots and cause fertilizer damage. The depth of fertilization should be 30-40 cm deep in autumn and not more than 20 cm in summer.
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