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What are the fertilizer requirements of apple trees?

Published: 2024-11-09 Author: mysheen
Last Updated: 2024/11/09, What are the fertilizer requirements of apple trees? Please introduce that for apple trees, there are usually two peaks in nitrogen absorption in a year. The first peak is synchronized with fruit development and branch and leaf growth, that is, with the rapid growth of young fruits and shoots, the demand for nitrogen fertilizer is increasing.

What are the characteristics of apple trees? For apple trees, nitrogen uptake usually peaks twice a year. The first peak is synchronous with fruit development and branch growth, that is, with the rapid growth of young fruits and new shoots, the demand for nitrogen is increasing. When the shoots are formed in July and August, the whole leaf area reaches the maximum, and the nitrogen demand reaches the highest peak. At present, it is considered that 0.075~0.25 kg of pure nitrogen should be applied to young apple trees without fruit every year. The optimum amount of fertilizer application is 0.63~0.54 kg urea, 0.25~0.5 kg urea for early fruiting trees, 0.5~1 kg urea for trees in full fruiting stage, 1~1.5 kg urea for trees in full fruiting stage, 2.2~3.2 kg urea. But it must be combined with phosphorus and potassium fertilizer to have the best effect. The application amount of phosphorus fertilizer can reach half of the amount of nitrogen fertilizer according to the effective composition than the annual application amount of nitrogen fertilizer. For example, nitrogen fertilizer application rate is 0.5 kg pure nitrogen per plant per year, equivalent to 1.1 kg urea; phosphorus fertilizer application requires 0.25 kg pure phosphorus (calculated by phosphorus pentoxide). If the available phosphorus of calcium superphosphate is 11%, each plant needs 2.3 kg of calcium superphosphate. The results of multi-point test of national apple fertilizer test network show that. 2∶1∶2 was the best ratio of N, P and K application in mature trees and 2∶2∶1 in young trees. The results showed that young trees needed less potassium and more phosphorus, and the older the fruiting trees were, the greater the demand for potassium, at least not lower than the application level of nitrogen. Orchards should also apply organic fertilizer once a year. Application amount according to the principle of catty fruit fertilizer, in late September or early October each year combined with deep ploughing and hole expansion once applied. The garden has been deeply turned over and applied below the outer edge of the canopy. Organic fertilizer must be decomposed beforehand. Click for more apple tree growing techniques Click for more fruit growing techniques

 
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