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1缺钙的原因果树缺钙的原因主要表现在:①由于土壤贫瘠,或由于长期大量使用化肥和不合理施肥造成土壤板结,或土壤呈酸性有效钙含量降低,及土壤中钾的含量过高,都可能导致钙素的缺乏。②由于树体枝叶量大,生长旺盛,夏季高温,叶片的蒸腾作用比果实强, 枝梢对钙的竞争力大于果实,造成果实因钙的外流而缺钙。③果实膨大期,对养分的需求增加,如果这时土壤不能为果实生长提供全面均衡的养分,就会导致果实因某种元素缺乏或过量而出现生理失调,出现各种病害。
1 Calcium deficiency causes Calcium deficiency causes mainly as follows: ① due to poor soil, or due to long-term heavy use of fertilizers and irrational fertilization caused by soil compaction, or soil acidic and effective calcium content decreased, and the soil potassium content is too high , May lead to the lack of calcium. ② Because of the large quantity of tree branches and leaves, strong growth and high temperature in summer, the transpiration of the leaves is stronger than that of the fruits and the shoots are more competitive with calcium than the fruits, resulting in calcium deficiency due to calcium outflow. If the soil does not provide a balanced and balanced nutrition for the growth of the fruit at this time, it will lead to physiological disorders due to lack of or excessive quantity of certain elements and various diseases.