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1 缺钙的症状表现及原因分析1.1 症状表现:表现在新生组织、幼叶、幼果生长缓慢。1.2 原因分析:(1)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,或土壤呈现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)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,枝稍对钙的竞争力大于果实,造成果实因钙的外流而缺钙。
1 calcium deficiency symptoms and causes analysis 1.1 Symptoms: performance in new tissue, young leaves, young fruit growth is slow. 1.2 Analysis of causes: (1) Lack of calcium may result from poor soil or soil compaction due to long-term heavy use of fertilizers and irrational fertilization, or the reduction of acidic and effective calcium content in soil and the high content of potassium in soil. (2) The amount of branches and leaves of the tree is big, the growth is vigorous, the summer is hot, the transpiration of the leaves is stronger than the fruit, the branch is slightly more competitive with calcium than the fruit, resulting in calcium deficiency due to calcium outflow.