The symptoms of iron deficiency in pears began with shoots. The leaf color changed from pale green to yellow, and only the veins remained green. When the disease was severe, the entire leaf was yellow-white, forming coke-eaten necrotic spots on the leaf margins. Onset branches are thin, internodes are prolonged, and axillary buds are not abundant. Pear trees may occur from seedlings to mature trees. The cause of this yellowing is iron deficiency, which is also known as iron deficiency. It is also known as iron deficiency yellow leaf disease. In some cases, the symptoms may be relieved after the stoppage of new shoots or the arrival of the rainy season. In general, the content of iron in the soil is abundant. In alkaline soils, the active iron is converted into inactive iron due to the action of salt, and cannot be absorbed and utilized by plants. The formation of iron deficiency chlorosis, iron deficiency yellow disease occurs in saline areas. In neutral soils, excess fertilizer and water, especially nitrogen fertilizers, cause new shoots to grow too prosperous. Inadequate absorption of iron can also cause new shoots to show different degrees of iron deficiency chlorosis, which can be increased by balanced fertilization. Applying organic fertilizer and applying biological fertilizer, controlling the growth of new shoots, etc., can control iron deficiency and loss of green. Formula fertilization: Phosphorus and potassium fertilizer 2 kg + organic fertilizer 6 kg + 300 g of microbial complex bacteria, it is best to add 2 pounds of bean cake ferrous sulfate appropriate amount, bud fertilizer once, swelling fruit fertilizer once, overwintering fertilizer once a year, a total of three times. Special attention should be paid to the application of nitrogen fertilizer fertilizer, re-application of organic fertilizer and biological fertilizer, normal fruit trees may be appropriate to reduce the ingredients. The above-mentioned P and K fertilizers can use more than 46% of the compound fertilizers. The organic fertilizers can be replaced by biogas liquids. The compound bacteria are Bacillus subtilis+Bacillus mucilaginosus, or new force compound bacteria. The nursing pad is a kind of disposable sanitary articles made of PE film, non-woven cloth, nap pulp, macromolecule and other materials, which is mainly used for hospital operation, gynecological examination, maternity care, infant care, paralyzed people urinate incontinence, and women during menstruation. Under Pad,Disposable Pads,Reusable Underpad,Disposable Underpad For Incontinence Shandong Kangshun Daily Products Co., Ltd , https://www.centurybenifit.com
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