First, the symptoms of calcium deficiency in cucumber show that the mobility of calcium in the plant is poor, so calcium deficiency symptoms often appear in the new tissue, and the young leaves generally contain less calcium than the old leaves. Calcium deficiency is likely to cause lesions in the heart and leaves, impede the growth of the apex, yellowing and curling of the leaves, the top leaves become smaller, dwarfing symptoms appear, and leaf vines become brown and dead. In the case of continuous low temperature, low light, and then suddenly sunny, high temperature, the leaves near the growing point of the leaf curl, dead, was parachute-like, the upper leaf veins yellow, the leaves become smaller, the root withered. Second, the main reasons for the lack of calcium in cucumber 1. The content of calcium in the soil is insufficient The calcium carbonate and calcium phosphate in the soil are the main source of calcium, but the sandy soil, the old vegetable garden, the heavy vegetable garden, and the vegetable garden with low organic matter content often contain calcium. Insufficient problem. 2. Low content of available calcium in the soil Generally, calcium does not exist in the soil, but ammonium ions, potassium ions, sodium ions, and magnesium ions dissolved in the soil solution can produce an antagonistic effect with calcium ions and inhibit the absorption and utilization of calcium ions by vegetables. , and the performance of calcium deficiency. 3. Absorption capacity of calcium in roots is poor. The absorption of calcium by vegetables is mainly accomplished by root tips, and the absorption capacity is poor. 4. Mobility of calcium in plants is poor The main driving force of calcium transport in plants is the transpiration of liquid flow. Calcium is transported through the catheter to vigorously growing organs, and it is basically no longer used for secondary distribution. Therefore, organs with large transpiration intensity and longer growth time transport more calcium, resulting in less calcium in the upper leaves. Calcium in the leaves is difficult to transfer to the fruit, resulting in calcium deficiency in the fruit. Third, the role of cucumber calcium supplement 1, prevention and treatment of physiological diseases increase calcium nutrition, can effectively prevent the calcium deficiency caused by a variety of physiological diseases. 2. Increase production and promote quality calcium can promote root absorption, cell division, and promote the synthesis of carbohydrates and proteins. 3, improve the storage and transportation of calcium can reduce the activity of ethylene synthase; reduce the respiratory rate, delay the respiratory phase, inhibit cell aging. In addition, calcium is an important constituent of the cell wall, which increases the rigidity of cells and organs and increases the hardness of the fruit. Four, cucumber calcium supplement technology points 1, base fertilizer in Pu Shi decomposed organic fertilizer, phosphorus, potassium fertilizer, sandy soil should increase calcium magnesium phosphate fertilizer, calcium superphosphate, calcium nitrate and other calcium-containing fertilizers; old vegetable garden and the most important Appropriate lime should be added. The amount of calcium fertilizer applied per mu is 1.67-3.33 kg per year. 2, foliar fertilizer per 100 kg of water plus 1 ~ 2 kg of superphosphate, stirring for half an hour, then soak for a period of time, the above supernatant can be sprayed, can also choose amino acid calcium, calcium humate, biological calcium fertilizer Etc., sprayed during the peak period of calcium absorption in vegetables. 3, scientific application of nitrogen and potassium fertilizer ammonium ions and potassium ions and calcium ions between the antagonistic effect, the soil ammonium, potassium content is too high, and nitrogen and calcium ratio is too high, can inhibit the absorption of calcium. The use of nitrogen and potassium fertilizers should be properly controlled and scientific fertilization should be conducted to avoid the phenomenon of excessive nitrogen and potassium fertilizers. 4. Addition of Organic Fertilizer Organic fertilizer is rich in organic matter and various nutrients required by crops. It is a complete fertilizer and has a unique effect on improving soil and fertility. 5. Appropriate amount of boron for proper application of boron fertilizer can promote the transportation of carbohydrates from the leaves to roots, promote new roots, and facilitate the absorption of calcium. In the case of calcium supplementation on the soil and foliar spray, appropriate amount of borax can be incorporated. . Mortuary Refrigerator Mortuary Refrigerator Medton Medical , https://www.medtonmedical.com