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钙是蔬菜作物生长发育不可缺少的一种重要元素,由于钙是非活动性元素,韧皮部中极少有钙的移动,根系中钙的下移有限,一般幼叶及幼嫩组织上、果实中极易缺钙。表现为植株新生部位如顶芽、根毛生育停滞,萎缩死亡,新叶粘连,不能正常展开,展开的新叶常焦边,残缺不全;植株矮小柔软,节间较短;果实顶端易出现凹陷,黑褐化坏死;严重缺钙时生长点坏死。
Calcium is an essential element in the growth and development of vegetable crops. Since calcium is an inactive element, there is very little movement of calcium in the phloem, and the downward movement of calcium in the root is limited. Generally, young leaves and young tissues, Easy to calcium deficiency. The performance of new parts of plants such as the top buds, root hair stagnation, shrinkage of death, new leaf adhesions, can not be normal, unfold new leaves often coke edge, incomplete; plant short and soft, internodes shorter; Black brown necrosis; severe calcium deficiency growth necrosis.