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一、果树缺钙(Ca)表现及防治钙(Ca)是果树生长的必需元素。果树缺钙(Ca)的表现:(1)叶片。叶片较小、幼叶出现褪绿与坏死斑点,严重时枝梢先端嫩叶、叶脉、顶叶和叶茎枯死。(2)花。营养不良、萎缩。(3)根。新根停止生长、粗、短、扭曲、褐变枯死。
First, the fruit of calcium deficiency (Ca) performance and prevention of calcium (Ca) is an essential element of fruit trees. Fruit tree calcium deficiency (Ca) performance: (1) leaves. Leaves smaller, young leaves appear chlorotic and necrotic spots, severe tip twig leaves, veins, parietal and leaf stems dead. (2) Flowers. Malnutrition, atrophy. (3) root. New roots stop growing, thick, short, twisted, brown dead.