1. Fertilization amount and application period Due to different ecological environment, soil conditions and cultivation management, the fertilization amount and fertilization period also vary with conditions, and the soil nutrient levels and soil nutrient supply intensity are related to the local citrus in Miaoqing. After the utilization of the fertilizer and the fertilizer, the soil nutrient content is determined by the soil collection, and is calculated according to the calculation formula of the balanced fertilization. In places where the above conditions are not available, soil testing can be carried out according to the soil nutrient content and tree potential, and the fertilization levels of the following crops can be referred to.
(1) Fertilization period of juvenile tree (1~4 age) Fertilization period: 10-15 days before sprouting of new shoots and new shoots after self-cutting, fertilization not less than 6-8 times throughout the year. After September, stop the rhizosphere fertilizer to prevent germination of late autumn shoots. 2 Fertilization amount: As the age of the tree increases, the amount of fertilizer is increased year by year. Before the sprouting of new shoots: 0.1-0.2 kg of urea applied to the plant or 0.1-0.2 kg of mixed (mixed) fertilizer in medium and high concentration plus septic mature manure or 20-30% of bran cake water. After the new shoots are self-cutting: 0.1-0.15 kg of high-concentration compound (mixed) fertilizer in the plant.
(2) Fertilization of adult trees (5 years old or older) 1. The initial results of fertilization of the first fruit trees are mainly focused on picking fruit fertilizer, pre-flowering fertilizer and strong fruit-promoting fertilizer.
Fruit harvesting: that is, fertilization after harvesting from December to January, for spring shoots, with slow-acting fertilizers such as organic fertilizer, supplemented by quick-acting fertilizer. Generally, each plant applies 0.15-0.3 kg of urea, 0.1-0.3 kg of high-concentration compound (mixed) fertilizer, and 10-20 kg of farmyard manure.
Pre-flowering fertilizer: Apply fertilizer before the first 2-3 months to promote the spring shoots and improve the flower quality. Generally, 0.1-0.25 kg of urea is applied per plant, 0.1-0.3 kg of high-concentration compound (mixed) fertilizer, and 10-20 kg of farmyard manure.
Strong fruit attack autumn shoot fertilizer: In mid-July, the strong fruit promotes the shoot fertilizer, in order to promote the autumn shoots, strong shoots and strong fruit to increase the fruit, the fertilizer dosage accounts for about 50% of the whole year, laying the foundation for the second year of high yield. Generally, 0.2-0.3 kg of urea is applied per plant, 1-2 kg of bran cake, 0.5-1.0 kg of calcium magnesium phosphate, and 0.25-0.3 kg of potassium sulfate.
2, the results of the fertile years of the tree of the prime year, the tree is fertilized 4-5 times a year, focusing on the before and after fruit picking, before the spring shoots and before the fall.
Fruit-harvesting: Late-maturing species, more mature mid-maturing species and weaker fruit trees should be applied before fruit picking, and medium-maturing varieties with few neutralization results should be applied after fruit picking. Before the application, the rain should be less early, and the quick-acting fertilizer should be used to restore the tree potential and protect the leaves for the winter. Generally, each plant applies 0.1-0.2 kg of urea, 0.5--1 kg of calcium, magnesium and phosphorus, 40-50 kg of farmyard manure and 1-2 kg of bran cake. Add 0.5 kg of lime to acid soil.
Pre-flowering fertilizer: 15 days before the spring shoots to promote the growth of spring shoots. Generally, each plant applies 0.3-0.5 kg of urea, high-concentration compound (mixed) fertilizer: 0.3-0.5 kg, and bio-organic fertilizer 2-3 kg.
Stable fruit fertilizer: look at the tree and apply. Generally, 0.2-0.3 kg of urea per plant or 0.4-0.5 kg of high-concentration compound (mixed) fertilizer.
Strong fruit promotes the tip fertilizer: 15 days before the germination of the autumn shoots before and after the heat, to promote the growth of the autumn shoots. Generally, each plant applies 2-3 kg of bran, high-concentration compound (mixed) fertilizer: 0.5-0.6 kg, potassium sulfate 0.3-0.5 kg, calcium magnesium phosphate 0.5--1 kg.
2. Method of fertilization
The main method is the annular groove and the groove. 1 Ring groove fertilization: dig a circular or semi-annular groove on the outside of the canopy drip line, with a width of 15-20 cm, apply the fertilizer into the ditch and immediately cover the soil. 2, groove-like fertilization: annual rotation in the outer side of the canopy drip symmetrical two dig trenches, width 20-30cm, when the expansion of the hole to change the soil depth of 60cm or more, the fertilizer into the ditch and immediately cover the soil.
3. Foliar fertilization of citrus trees, spraying borax and urea mixture 1-2 times outside the flowering stage, can increase the quality of flowers, increase the fruit setting rate from the surface; spray 2-3 during the flowering period The mixture of potassium dihydrogen phosphate and urea can reduce physiological fruit drop and promote the rapid expansion of young fruit; spraying the potassium dihydrogen phosphate solution after harvesting can better restore the tree potential and protect the green leaves for winter, laying a foundation for the next year's high yield. Foliar fertilization should strictly control the concentration of use to prevent fat damage. Commonly used foliar fertilizer use concentration: urea 0.1-0.2%; potassium dihydrogen phosphate 0.1-0.2%; borax 0.1-0.2%; magnesium sulfate 0.3-0.5%, zinc sulfate 0.1-0.3%. Spray once every other week.
Author: Huangshao Fu
Source: Guangxi Soil and Fertilizer Information Network
(1) Fertilization period of juvenile tree (1~4 age) Fertilization period: 10-15 days before sprouting of new shoots and new shoots after self-cutting, fertilization not less than 6-8 times throughout the year. After September, stop the rhizosphere fertilizer to prevent germination of late autumn shoots. 2 Fertilization amount: As the age of the tree increases, the amount of fertilizer is increased year by year. Before the sprouting of new shoots: 0.1-0.2 kg of urea applied to the plant or 0.1-0.2 kg of mixed (mixed) fertilizer in medium and high concentration plus septic mature manure or 20-30% of bran cake water. After the new shoots are self-cutting: 0.1-0.15 kg of high-concentration compound (mixed) fertilizer in the plant.
(2) Fertilization of adult trees (5 years old or older) 1. The initial results of fertilization of the first fruit trees are mainly focused on picking fruit fertilizer, pre-flowering fertilizer and strong fruit-promoting fertilizer.
Fruit harvesting: that is, fertilization after harvesting from December to January, for spring shoots, with slow-acting fertilizers such as organic fertilizer, supplemented by quick-acting fertilizer. Generally, each plant applies 0.15-0.3 kg of urea, 0.1-0.3 kg of high-concentration compound (mixed) fertilizer, and 10-20 kg of farmyard manure.
Pre-flowering fertilizer: Apply fertilizer before the first 2-3 months to promote the spring shoots and improve the flower quality. Generally, 0.1-0.25 kg of urea is applied per plant, 0.1-0.3 kg of high-concentration compound (mixed) fertilizer, and 10-20 kg of farmyard manure.
Strong fruit attack autumn shoot fertilizer: In mid-July, the strong fruit promotes the shoot fertilizer, in order to promote the autumn shoots, strong shoots and strong fruit to increase the fruit, the fertilizer dosage accounts for about 50% of the whole year, laying the foundation for the second year of high yield. Generally, 0.2-0.3 kg of urea is applied per plant, 1-2 kg of bran cake, 0.5-1.0 kg of calcium magnesium phosphate, and 0.25-0.3 kg of potassium sulfate.
2, the results of the fertile years of the tree of the prime year, the tree is fertilized 4-5 times a year, focusing on the before and after fruit picking, before the spring shoots and before the fall.
Fruit-harvesting: Late-maturing species, more mature mid-maturing species and weaker fruit trees should be applied before fruit picking, and medium-maturing varieties with few neutralization results should be applied after fruit picking. Before the application, the rain should be less early, and the quick-acting fertilizer should be used to restore the tree potential and protect the leaves for the winter. Generally, each plant applies 0.1-0.2 kg of urea, 0.5--1 kg of calcium, magnesium and phosphorus, 40-50 kg of farmyard manure and 1-2 kg of bran cake. Add 0.5 kg of lime to acid soil.
Pre-flowering fertilizer: 15 days before the spring shoots to promote the growth of spring shoots. Generally, each plant applies 0.3-0.5 kg of urea, high-concentration compound (mixed) fertilizer: 0.3-0.5 kg, and bio-organic fertilizer 2-3 kg.
Stable fruit fertilizer: look at the tree and apply. Generally, 0.2-0.3 kg of urea per plant or 0.4-0.5 kg of high-concentration compound (mixed) fertilizer.
Strong fruit promotes the tip fertilizer: 15 days before the germination of the autumn shoots before and after the heat, to promote the growth of the autumn shoots. Generally, each plant applies 2-3 kg of bran, high-concentration compound (mixed) fertilizer: 0.5-0.6 kg, potassium sulfate 0.3-0.5 kg, calcium magnesium phosphate 0.5--1 kg.
2. Method of fertilization
The main method is the annular groove and the groove. 1 Ring groove fertilization: dig a circular or semi-annular groove on the outside of the canopy drip line, with a width of 15-20 cm, apply the fertilizer into the ditch and immediately cover the soil. 2, groove-like fertilization: annual rotation in the outer side of the canopy drip symmetrical two dig trenches, width 20-30cm, when the expansion of the hole to change the soil depth of 60cm or more, the fertilizer into the ditch and immediately cover the soil.
3. Foliar fertilization of citrus trees, spraying borax and urea mixture 1-2 times outside the flowering stage, can increase the quality of flowers, increase the fruit setting rate from the surface; spray 2-3 during the flowering period The mixture of potassium dihydrogen phosphate and urea can reduce physiological fruit drop and promote the rapid expansion of young fruit; spraying the potassium dihydrogen phosphate solution after harvesting can better restore the tree potential and protect the green leaves for winter, laying a foundation for the next year's high yield. Foliar fertilization should strictly control the concentration of use to prevent fat damage. Commonly used foliar fertilizer use concentration: urea 0.1-0.2%; potassium dihydrogen phosphate 0.1-0.2%; borax 0.1-0.2%; magnesium sulfate 0.3-0.5%, zinc sulfate 0.1-0.3%. Spray once every other week.
Author: Huangshao Fu
Source: Guangxi Soil and Fertilizer Information Network
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
UVC Disinfection Portable UV Lamp
Uvc Lamp,Uv Germicidal Bulb,Uv Germicidal Lamp,Uvc Tube
Changxing leboom lighting product CO.Ltd. , https://www.leboomuv.com