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Calcium deficiency in the orchard can weaken the growth of peach roots, mainly in the growth of the root tip of the young roots, while the cortex continues to thicken, and many new roots are produced at the proximal root tip; when the calcium is severely deficient, the young roots gradually die, in the dead roots. A lot of new roots grow in the vicinity, forming a group of thick and short branches.
(2) Conditions of occurrence When the soil acidity is high, calcium can be quickly lost. If the soil contains a large amount of calcium and is good for absorption, if there are many nitrogen, potassium, and magnesium, calcium deficiency is likely to occur.
(3) Correction method 0.1% calcium sulfate was sprayed on the foliage at the beginning of growth.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
Peach tree calcium deficiency and treatment technology
(1) Symptoms Peach trees are very sensitive to calcium deficiency. The peach seedlings are planted in calcium deficiency nutrient solution, and the initial symptom is a decrease in apical growth. The size of the old leaves is comparable to that of normal leaves, but the young leaves are smaller than normal. The leaves are dark green without any chlorosis. Later, the central part of the young leaves showed large chlorotic and necrotic areas, and the lateral short branches and new shoots were particularly obvious. There are large characteristic necrotic spots on both sides of the main vein. The old leaves then appear to be chlorotic and broken. Finally, the blade falls off from the tip end, and the tip end is withered. Under the control of nutrient conditions, peach leaves first appeared calcium deficiency symptoms, while potassium and magnesium content was relatively high.
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