Pear tree yellowing fertilization

November 11 07:08:28, 2023

In recent years, the occurrence of yellowing disease in pear trees is very common. It can occur from seedlings to adult stages. The symptoms usually start from the new shoots. The leaf color changes from light green to yellow, and only the veins remain green. The leaves are yellowish white, forming a focal necrotic spot on the leaf margin. The new shoots of the disease are weak, the internodes are prolonged, and the axillary buds are not full. The reason for this yellowing is iron deficiency, so it is also called iron deficiency. Sometimes the symptoms of yellowing of pear trees are reduced after the new shoots stop or the rainy season.


Linyi Fertilizer Network Copyright
Generally, the content of iron in the soil is abundant. In the alkaline soil, the active iron is converted into inactive iron due to the action of the salt base, and cannot be absorbed and utilized by the plant to form iron deficiency chlorosis. In neutral soil, large fertilizer water, especially partial nitrogen fertilizer, causes excessive growth of new shoots and insufficient absorption of iron. It also causes new shoots to exhibit different degrees of iron deficiency chlorosis. In this case, balanced fertilization can be achieved. The method of adding organic fertilizer, applying more biological fertilizer, controlling the growth of new shoots and other methods can control the iron deficiency and chlorosis. Linyi Fertilizer Network Copyright

Linyi Fertilizer Network Copyright
Formulated fertilization: 1000 grams of phosphorus and potassium fertilizer + 3000 grams of organic fertilizer + 300 grams of microbial complex bacteria, preferably plus 1000 grams of bean cake, ferrous sulfate, bud fertilizer once, expanded fruit fertilizer once, winter fertilizer once, a total of 3 times a year . Special attention should be paid to the use of nitrogen fertilizer, heavy application of organic fertilizer and biological fertilizer, and normal fruit trees can reduce the amount of ingredients. The phosphorus and potassium fertilizer mentioned above can be used for more than 46% of compound fertilizer, and the organic fertilizer can be replaced by biogas liquid. The composite bacteria are Bacillus subtilis + Bacillus licheniformis, or a new force composite fungicide. In addition, when yellowing diseases occur in fruit trees such as apple trees, kiwi trees, and peach trees, they can also be controlled by this method. Linyi Fertilizer Network Copyright
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