Results The principle of fertilization of lemon trees is to reapply deep autumn and fruit-fertilizers, and to observe the effects of fertilizers and ear fruit fertilizers before the trees are applied. It is light in the first half and heavier in the second half.
When the spring shoots are sprouting from February to March, the first fertilization is performed. According to the vigor and strength of the tree, some quick-acting nitrogen fertilizers are supplemented. Weak and thick flowers have more trees and more trees; trees with less trees and less flowers use less or less. The amount of nitrogen fertilizer accounted for 10 to 15% of the total amount of the year, promoting spring shoots robust growth.
The second fertilization, after fetching the flowers and before the fruit enlargement, combined with fruit preservation and pest control, sprayed 0.3% urea solution several times to supplement the loss of tree nutrients after flowering, and increased the amount of fruit.
The third fertilization started in July-August, and it was the autumn shoot extraction, fruit expansion period. This fertilizer has a large amount of fertilizer. Nitrogen fertilizer accounts for 40% of the annual dosage. Phosphorus and potassium fertilizers each account for 50%. Two fertilization pits, 30 to 40 centimeters deep, are established at each drip line to ensure that the autumn shoots are robust and spring flowers. Well-differentiated.
After the fourth fertilization was harvested in November and before the temperature dropped, it was reapplied. Digging deep in the other two sides of the fertilization in autumn, the amount of nitrogen fertilizer accounted for 40% of annual consumption, phosphorus and potassium accounted for 40% each, mainly organic fertilizers such as green manure and slag.
The amount of fertilizer is determined according to the yield of each tree in the past two years. To produce 30 kg per year, 0.3 kg of pure nitrogen, 0.2 kg of pure phosphorus, 0.2 kg of pure potassium, approximately 0.6 kg of urea equivalent, and 1.0 kg of superphosphate should be applied. , Potassium chloride 0.5 kg. According to experiments, for a 15-year-old lemon tree, cow dung 4 times a year, each 150 kilograms per plant, with an average yield of 48 kilograms; each plant applied 50O kilograms, plant yield up to 73 kilograms.
In addition, when the spring fruit suffers a loss, immediate fertilizer should be added immediately to promote the results of May and June flowers and increase the current year's output.
When the spring shoots are sprouting from February to March, the first fertilization is performed. According to the vigor and strength of the tree, some quick-acting nitrogen fertilizers are supplemented. Weak and thick flowers have more trees and more trees; trees with less trees and less flowers use less or less. The amount of nitrogen fertilizer accounted for 10 to 15% of the total amount of the year, promoting spring shoots robust growth.
The second fertilization, after fetching the flowers and before the fruit enlargement, combined with fruit preservation and pest control, sprayed 0.3% urea solution several times to supplement the loss of tree nutrients after flowering, and increased the amount of fruit.
The third fertilization started in July-August, and it was the autumn shoot extraction, fruit expansion period. This fertilizer has a large amount of fertilizer. Nitrogen fertilizer accounts for 40% of the annual dosage. Phosphorus and potassium fertilizers each account for 50%. Two fertilization pits, 30 to 40 centimeters deep, are established at each drip line to ensure that the autumn shoots are robust and spring flowers. Well-differentiated.
After the fourth fertilization was harvested in November and before the temperature dropped, it was reapplied. Digging deep in the other two sides of the fertilization in autumn, the amount of nitrogen fertilizer accounted for 40% of annual consumption, phosphorus and potassium accounted for 40% each, mainly organic fertilizers such as green manure and slag.
The amount of fertilizer is determined according to the yield of each tree in the past two years. To produce 30 kg per year, 0.3 kg of pure nitrogen, 0.2 kg of pure phosphorus, 0.2 kg of pure potassium, approximately 0.6 kg of urea equivalent, and 1.0 kg of superphosphate should be applied. , Potassium chloride 0.5 kg. According to experiments, for a 15-year-old lemon tree, cow dung 4 times a year, each 150 kilograms per plant, with an average yield of 48 kilograms; each plant applied 50O kilograms, plant yield up to 73 kilograms.
In addition, when the spring fruit suffers a loss, immediate fertilizer should be added immediately to promote the results of May and June flowers and increase the current year's output.
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