植物缺钙（酮戊二酸钙Calcium Ketoglutarate、大米螯合钙Calcium Rice Chelate）症状及矫治方法

苹果果树对于钙素的需求非常旺盛,钙素营养作为一种决定果实品质的元素，在果园生产中往往被忽略。如果因为钙素供应不足导致苹果果实缺钙，果实会出现苦痘病、水心病等病害，极大地降低了果实的商品率；对于桃树缺钙会产生顶腐病、流胶病等；以及鸭梨的黑心病等都与钙素营养有着密切的关系。在渭北旱塬苹果主产区中，土壤成土母质中钙含量较高，但是由于石灰性土壤本身pH较高,加之不合理的施肥方式，影响了钙的有效性。针对于果园钙素营养不足导致的生理性病害，在田间生产中采取诸多不同的补钙措施,比如传统的土壤追施、果面喷施和采后浸钙的方式。传统的土壤施钙应采取少量多次的原则，前人研究表明,三次分施钙肥比一次性施入能够显著降低苦痘病的发病比例同时显著提高单果重、总糖含量和可溶性固形物的含量。比如在果树膨大期，此时根系活动较为旺盛，对养分吸收能力较强，有利于果实钙素的积累。果实喷钙技术目前是补钙效果最为显著的一种追肥措施，主要原因是钙素在植物体内迁移速度较慢,难以向果实等营养部位转运。

植物缺钙（酮戊二酸钙Calcium Ketoglutarate、大米螯合钙Calcium Rice Chelate）症状及矫治方法

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Plant calcium deficiency (Calcium Ketoglutarate, Calcium Rice Chelate) symptoms and treatment methods

Apple trees have a very strong demand for calcium. Calcium nutrition, as an element that determines fruit quality, is often ignored in orchard production. If apple fruits are deficient in calcium due to insufficient calcium supply, diseases such as bitter pox and water core will appear on the fruit, greatly reducing the commercial rate of the fruit; calcium deficiency in peach trees will cause top rot, gummosis, etc.; and The black heart disease of Yali is closely related to calcium nutrition. In the main apple-producing areas of the Weibei Dry Plateau, the calcium content in the soil parent material is relatively high. However, the high pH of the calcareous soil itself and unreasonable fertilization methods affect the effectiveness of calcium. In view of the physiological diseases caused by insufficient calcium nutrition in orchards, many different calcium supplementation measures are adopted in field production, such as traditional soil topdressing, fruit surface spraying and post-harvest calcium leaching. Traditional soil calcium application should adopt the principle of small amounts and multiple times. Previous studies have shown that applying calcium fertilizer three times can significantly reduce the incidence of bitter pox disease and significantly increase single fruit weight, total sugar content and soluble calcium fertilizer compared with one-time application. Solid content. For example, during the expansion period of fruit trees, root activity is relatively strong and the ability to absorb nutrients is strong, which is conducive to the accumulation of calcium in the fruit. The fruit calcium spraying technology is currently the most effective top-dressing measure for calcium supplementation. The main reason is that calcium migrates slowly within the plant and is difficult to transport to nutritional parts such as fruits.

Plant calcium deficiency (Calcium Ketoglutarate, Calcium Rice Chelate) symptoms and treatment methods

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