What causes lobular disease?

Fruit tree small leaf disease often occurs in recent years, and there is a trend of aggravation year by year. Leaflet disease not only causes short plants, slow growth and development of branches and buds, but also causes branches and leaves to die when severe, fruit trees cannot bloom normally, or small or abnormal fruits appear. So what causes lobular disease?

Plant leaf disease is a symptom of zinc deficiency. In addition to this, there is an important factor that is caused by improper pruning of fruit trees.

Excessive phosphorus fertilizer induces zinc deficiency in soil. There are synergistic effects, antagonistic effects, or one-way antagonistic effects among various nutrient elements such as nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, iron, zinc, copper, manganese, selenium, molybdenum and silicon needed by fruit trees. For example, potassium and nitrogen, calcium, magnesium have mutual antagonism, nitrogen, calcium, magnesium have mutual synergy (The increase of one element will be beneficial to the absorption of the other two elements); there is a one-way antagonism between phosphorus and nitrogen, zinc, potassium, magnesium, calcium, copper and silicon. When phosphorus is excessive in the soil, if nitrogen, zinc, potassium, magnesium, calcium, copper and silicon are not increased, the tree body will reduce the absorption of nitrogen, zinc, potassium, magnesium, calcium, copper and silicon, and show symptoms of deficiency of nitrogen, zinc, potassium, magnesium, calcium, copper and silicon. Zinc deficiency in many orchards is related to excessive phosphorus application.

Excessive application of calcium phosphate in the soil zinc and excessive phosphorus interaction, resulting in zinc phosphate precipitation affect zinc absorption, obvious zinc deficiency symptoms; excessive application of calcium magnesium phosphate and other alkaline phosphorus, soil alkalization, zinc availability reduction will affect zinc absorption.