What are the fertilization principles for pollution-free cultivation of Ponkan mandarin
Fertilization principles for pollution-free Ponkan mandarin cultivation
"Crops bloom like flowers, all thanks to fertilizer." For Ponkan mandarin trees to be high-quality, bear fruit early, and produce high and stable yields, fertilization must be scientific. Pollution-free cultivation of Ponkan mandarin should be carried out in accordance with NY/T496-2002. Fully meet the Ponkan mandarin tree's demand for various nutrient elements, advocate applying more organic fertilizer, apply chemical fertilizer reasonably, and advocate formula fertilization based on leaf nutrient diagnosis. Fertilizers used for Ponkan mandarin trees should be those registered by the administrative department of agriculture or exempt from registration, and the use of chlorine-containing fertilizers should be restricted. Fertilization of Ponkan mandarin trees should be based on variety (strain), rootstock, soil, climate, fertilizer type, and planting density, so as to achieve economical and scientific fertilization.
1. Fertilize according to the tree
Apply fertilizer scientifically and reasonably according to different varieties (strains), rootstocks, tree ages, growth stages, tree vigor, and different nutrient deficiency symptoms.
2. Fertilize according to climate
Because climate factors such as temperature and rainfall not only directly affect the ability of the Ponkan mandarin root system to absorb nutrients, but also have a major impact on the decomposition of soil organic matter, the transformation of nutrient forms, and the activity of soil microorganisms, fertilization should therefore be reasonably carried out in combination with climate (watching the sky).
3. Fertilize according to soil
That is, based on the soil type, texture, structure, moisture conditions, soil organic matter content, soil pH, and soil maturity degree of the Ponkan mandarin cultivation site, adapt measures to the soil and fertilize reasonably.
4. Economical fertilization
Economical fertilization means obtaining the best economic benefit at the lowest fertilizer cost. At present, the most effective method is formula fertilization based mainly on leaf nutrient diagnosis, combined with the results of soil nutrient diagnosis.
5. Combine fertilization with other cultivation measures
The high quality and high yield of Ponkan mandarin are the result of comprehensive cultivation measures. Therefore, fertilization should be combined with measures such as maturing, improving, and enriching the soil, tillage, irrigation, pruning and shaping, flower and fruit preservation, and pest and disease control.
1. Fertilize according to the tree
Apply fertilizer scientifically and reasonably according to different varieties (strains), rootstocks, tree ages, growth stages, tree vigor, and different nutrient deficiency symptoms.
2. Fertilize according to climate
Because climate factors such as temperature and rainfall not only directly affect the ability of the Ponkan mandarin root system to absorb nutrients, but also have a major impact on the decomposition of soil organic matter, the transformation of nutrient forms, and the activity of soil microorganisms, fertilization should therefore be reasonably carried out in combination with climate (watching the sky).
3. Fertilize according to soil
That is, based on the soil type, texture, structure, moisture conditions, soil organic matter content, soil pH, and soil maturity degree of the Ponkan mandarin cultivation site, adapt measures to the soil and fertilize reasonably.
4. Economical fertilization
Economical fertilization means obtaining the best economic benefit at the lowest fertilizer cost. At present, the most effective method is formula fertilization based mainly on leaf nutrient diagnosis, combined with the results of soil nutrient diagnosis.
5. Combine fertilization with other cultivation measures
The high quality and high yield of Ponkan mandarin are the result of comprehensive cultivation measures. Therefore, fertilization should be combined with measures such as maturing, improving, and enriching the soil, tillage, irrigation, pruning and shaping, flower and fruit preservation, and pest and disease control.