Fertilization according to the characteristics of citrus growth and development, changed to 4 times in the past four times, that is, fertilization in spring and autumn, called simplified fertilization, and achieved good results. The main technical briefs are as follows.
1. Fertilization period: Spring is a key period for citrus germination, flowering and young fruit growth and development. Applying spring fertilizer before germination in spring, that is, putting the stable fruit fertilizer into the spring in advance, and applying it together with the anterior fertilizer, can promote nutrient spring shoots and ensure nutrient in time before the second physiological fruit drop. Supplement, to achieve stable fruit, improve production purposes, but also save labor, reduce the cost of work, especially orange can change the autumn shoots as the mother shoots, the reduction of ulcer infection.
Autumn is a crucial period for fruit growth and autumn shoots. Applying fertilizer at this time is conducive to improving the quality of the fruit, promoting the autumn shoots, ensuring a healthy mother branch in the next year, enhancing nutrient accumulation and improving cold resistance. Autumn fertilizer should generally be carried out from late September to early October. If it is too late, it will affect the coloration and maturity of early-maturing varieties. The fertilizer varieties are mainly mixed with fertilizer and farmyard manure.
2, the determination of the amount of fertilization: generally calculated from the theory: citrus per 1000 kg of fruit need to take away from the soil 1.18-1.86 kg, phosphorus pentoxide 0.17-0.27 kg, oxidation Potassium 1.7-2.61 kg, calcium oxide 0.36-1.04 kg, magnesium oxide 0.17-1.19 kg.
Reasonable fertilization amount = (absorption amount - soil supply amount) / fertilizer absorption utilization rate. Absorption: The fruit yield × contains the NPK components, which are calculated separately. Soil supply: Nitrogen is 1/3 of the absorption, and phosphorus and potassium are 1/2 of the swelling. Fertilizer absorption and utilization rate: nitrogen is 50%, phosphorus is 30%, and potassium is 40%. Calculate the theoretical amount of fertilizer, and then adjust it according to the variety, rootstock, tree potential and yield to make it suitable for local conditions to obtain high quality and high yield.
Based on empirical fertilization combined with yield, a reasonable amount of NPK application is recommended. For example, the yield per plant is 20 kg, and 3 kg of cake fertilizer is needed in a year, 0.95 kg of urea, 0.76 superphosphate, 0.41 kg of potassium chloride; 40 kg of plant yield per plant. 5 kg, urea 1.63 kg, 1.25 kg of superphosphate, 0.68 kg of potassium chloride, and so on. Generally, the amount of fertilization in spring should account for 40% of the total fertilization amount in the year. Among them, organic fertilizer should account for 60% of the amount of spring fertilization; autumn fertilization should account for 60% of total fertilization in the whole year, of which organic fertilizer should account for autumn fertilization. 80% of the amount.
3, need to pay attention to the problem: after harvesting fruit must be timely with 0.3% potassium dihydrogen phosphate + 0.5% urea root top dressing once, to promote the tree as soon as possible to restore. To avoid single fertilization, gradually implement leaf nutrition diagnosis and guide fertilization, apply organic fertilizer to ensure the full supply of nutrients, and give full play to fertilizer efficiency and economic fertilizer. Potassium nutrients can significantly increase fruiting rate, increase fruit and improve quality. Therefore, we must pay attention to the application of potassium fertilizer. Potassium sulphate is preferred. If potassium chloride is applied, it must be noted that the application rate should not be too much, and it should not be applied for several years. Generally, after applying 2-3 years of potassium chloride, potassium sulphate should be used instead. At the same time, it should be used in conjunction with organic fertilizers to prevent the accumulation of chloride ions and affect the quality of the fruit.
1. Fertilization period: Spring is a key period for citrus germination, flowering and young fruit growth and development. Applying spring fertilizer before germination in spring, that is, putting the stable fruit fertilizer into the spring in advance, and applying it together with the anterior fertilizer, can promote nutrient spring shoots and ensure nutrient in time before the second physiological fruit drop. Supplement, to achieve stable fruit, improve production purposes, but also save labor, reduce the cost of work, especially orange can change the autumn shoots as the mother shoots, the reduction of ulcer infection.
Autumn is a crucial period for fruit growth and autumn shoots. Applying fertilizer at this time is conducive to improving the quality of the fruit, promoting the autumn shoots, ensuring a healthy mother branch in the next year, enhancing nutrient accumulation and improving cold resistance. Autumn fertilizer should generally be carried out from late September to early October. If it is too late, it will affect the coloration and maturity of early-maturing varieties. The fertilizer varieties are mainly mixed with fertilizer and farmyard manure.
2, the determination of the amount of fertilization: generally calculated from the theory: citrus per 1000 kg of fruit need to take away from the soil 1.18-1.86 kg, phosphorus pentoxide 0.17-0.27 kg, oxidation Potassium 1.7-2.61 kg, calcium oxide 0.36-1.04 kg, magnesium oxide 0.17-1.19 kg.
Reasonable fertilization amount = (absorption amount - soil supply amount) / fertilizer absorption utilization rate. Absorption: The fruit yield × contains the NPK components, which are calculated separately. Soil supply: Nitrogen is 1/3 of the absorption, and phosphorus and potassium are 1/2 of the swelling. Fertilizer absorption and utilization rate: nitrogen is 50%, phosphorus is 30%, and potassium is 40%. Calculate the theoretical amount of fertilizer, and then adjust it according to the variety, rootstock, tree potential and yield to make it suitable for local conditions to obtain high quality and high yield.
Based on empirical fertilization combined with yield, a reasonable amount of NPK application is recommended. For example, the yield per plant is 20 kg, and 3 kg of cake fertilizer is needed in a year, 0.95 kg of urea, 0.76 superphosphate, 0.41 kg of potassium chloride; 40 kg of plant yield per plant. 5 kg, urea 1.63 kg, 1.25 kg of superphosphate, 0.68 kg of potassium chloride, and so on. Generally, the amount of fertilization in spring should account for 40% of the total fertilization amount in the year. Among them, organic fertilizer should account for 60% of the amount of spring fertilization; autumn fertilization should account for 60% of total fertilization in the whole year, of which organic fertilizer should account for autumn fertilization. 80% of the amount.
3, need to pay attention to the problem: after harvesting fruit must be timely with 0.3% potassium dihydrogen phosphate + 0.5% urea root top dressing once, to promote the tree as soon as possible to restore. To avoid single fertilization, gradually implement leaf nutrition diagnosis and guide fertilization, apply organic fertilizer to ensure the full supply of nutrients, and give full play to fertilizer efficiency and economic fertilizer. Potassium nutrients can significantly increase fruiting rate, increase fruit and improve quality. Therefore, we must pay attention to the application of potassium fertilizer. Potassium sulphate is preferred. If potassium chloride is applied, it must be noted that the application rate should not be too much, and it should not be applied for several years. Generally, after applying 2-3 years of potassium chloride, potassium sulphate should be used instead. At the same time, it should be used in conjunction with organic fertilizers to prevent the accumulation of chloride ions and affect the quality of the fruit.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Ed Strip Patch,Led Uv Lamp Beads,Smd Led 0802 Light,Smdled 0802 Lamp Beads
Dongguan XINYUDA Technology Co., Ltd. , https://www.gdxige.com