How to apply fertilizer reasonably to treat pear chlorosis skillfully
The symptom of iron deficiency of pear tree starts from the new shoot, the leaf color changes from light green to yellow, only the leaf vein remains green, the whole leaf is yellow-white when it occurs seriously, and scorched dead spots are formed at the leaf edge. The new shoots of the disease are thin and weak, the internodes are prolonged, and the axillary buds are not full, which may occur in all stages of pear trees from seedling to adult. The cause of this yellowing is iron deficiency, so it is also known as iron deficiency, also known as iron deficiency yellow leaf disease. Sometimes the symptoms are alleviated after the new shoots stop growing or after the arrival of the rainy season, the content of iron in the general soil is rich, and in alkaline soil, active iron is transformed into inactive iron, which can not be absorbed and utilized by plants, resulting in iron deficiency chlorosis. Iron deficiency chlorosis mostly occurs in saline-alkali areas. In neutral soil, excessive fertilizer and water, especially partial application of nitrogen fertilizer, result in overgrowth of new shoots and insufficient absorption of iron, which will also make new shoots show varying degrees of iron deficiency and chlorosis. In this case, iron deficiency and chlorosis can be controlled by balanced fertilization, organic fertilizer and biological fertilizer. Control of new shoot growth and other methods. Formula fertilization: 2 jin of phosphorus and potassium fertilizer + 6 jin of organic fertilizer + 300 grams of microbial compound bacteria, it is best to add 2 jin of ferrous sulfate from bean cake, bud fertilizer once, fruit expansion fertilizer once, overwintering fertilizer once, three times a year. Pay special attention to bud fertilizer must be less nitrogen fertilizer, re-application of organic fertilizer and biological fertilizer, normal fruit trees can appropriately reduce ingredients. The above-mentioned phosphorus and potassium fertilizer can use more than 46% compound fertilizer, organic fertilizer can be replaced by biogas liquid, and the compound bacteria are Bacillus subtilis + glial bacillus, or new force compound bacteria. In addition, when chlorosis occurs in apple trees, kiwifruit trees, peach trees and other fruit trees, it can also be prevented by this method.
- Prev
Which kinds of aphids are harmful to pear trees?
The main aphids harming pear trees are pear bifurcation aphid, pear yellow powder aphid and pear original tail aphid. These three kinds of aphids only harm pear trees, the occurrence of two aphids and yellow powder aphids are common and serious, and the original tail aphids rarely occur and the damage is mild. The morphological differences are as follows: (1) pear aphid: ① wingless female aphid 2 mm long, green.
- Next
How to prevent and control potassium deficiency in pear trees
When the villagers reflected the pear orchard in a mountain village, they found that the branches of some pear trees were shortened, their leaves became smaller and yellowish green, and their leaf edges curled, browned and scorched. In serious cases, the whole leaves were like this, like a fire, especially in the trees with barren land and bare roots, which affected the tree potential and yield. Many fruit growers do it.
Related
- Moge, come on! The staff of the peasant association in the producing area of cantaloupe were frightened when the crowd gathered.
- Causes and Solutions of low Fruit setting rate of Apple
- Symptoms and control measures of passion fruit virus disease
- Fruit growing lesson: how do apple orchards keep high yields?
- Can you build orchards in the mountains? What are the pros and cons?
- How to manage the coloring period of Crisson grape?
- This paper introduces the processing technology of two kinds of fig products.
- How much is a month for retired teachers in rural areas by 2020?
- How can strawberry planting increase sugar content? We should pay attention to management in many aspects.
- What are the cultivation techniques on how to improve the yield of golden fruit?