The person lacks calcium easy osteoporosis, what symptom does that vegetable lack calcium have? How do you add it?

Calcium is a metal element, a large amount of calcium in bones and teeth, is the main component of the body tissue, plays a role in supporting the body. That person lacks calcium easy osteoporosis, what symptom does that vegetable lack calcium have? How do you add it?

The person lacks calcium easy osteoporosis, what symptom does that vegetable lack calcium have?

Acid soil is easy to lack calcium, which is mainly due to the physiological imbalance in crops. when calcium is deficient, the meristem such as terminal bud, lateral bud and root tip first appears deficiency, plant growth is blocked, Internode is short, plant is short, soft, young leaves are curly and fragile, leaf margin yellowing, gradually withering, leaf tip sticking. Not strong or rarely strong. Calcium deficiency causes leaf scorch disease in cabbage, Chinese cabbage and lettuce, navel rot in tomato, pepper and watermelon. The symptoms of calcium deficiency in several vegetables are as follows:

1, Chinese cabbage calcium deficiency leaf edge rot, inner leaf edge water immersion, to brown necrosis, dry like tofu skin, also known as dry heartburn, dry edge, internal top burn.

2. The tip of young leaves of tomato with calcium deficiency turned yellow, the plant was thin and wilted, the stalk curled, the terminal bud died, necrotic tissue appeared around the terminal bud, the root system was underdeveloped, the root was short, branched and brown. The fruit is prone to heart rot or hollow fruit.

3. There are white transparent rot spots on the edge of calcium-deficient leaves and veins of cucumbers, chlorosis between veins in severe cases, plant dwarfing, tender leaves rolled up, melons small and tasteless, and flowers small in yellow and white.

4. The growth of lettuce was inhibited by calcium deficiency, the young leaves were curled and deformed, and the leaf margin was brown to gray. In severe cases, the young leaves die from the top to the inside, and the dead tissue is grayish green.

5. Cabbage is calcium deficient with curly leaf margin, discoloration, white stripes and death of growing point.

6. the young leaves of celery with calcium deficiency died in the early stage, the growth was weak, the leaf color was gray-green, the growing point died, and the leaf edge of the leaflet tip twisted and blackened.

How to supplement calcium deficiency in vegetables?

1. Reasons for calcium deficiency:

One is the soil. For example, the content of available calcium in the soil is low, which can not meet the calcium demand of vegetables; the high salt content in the soil inhibits the absorption of water and calcium by roots; the acidity of the soil is strong, which affects the availability of calcium, which is not conducive to the absorption of calcium by roots; the soil is dry, which makes the concentration of soil solution high, which reduces the water absorption of roots, thus inhibiting the absorption of calcium. The soil tillage layer is shallow and too sandy, which leads to its poor ability of water and fertilizer conservation, resulting in the loss of calcium; the soil is too sticky and the activity of calcium is poor, which is not conducive to root absorption. The second is the partial application of nitrogen fertilizer. Because of the interaction between nitrogen and calcium, excessive application of nitrogen fertilizer will reduce the availability of calcium in soil and affect the absorption of calcium by vegetables, resulting in calcium deficiency. In addition, the imbalance of water supply and root injury can also lead to calcium deficiency in vegetables.

2. Calcium supplement measures:

One is to apply mature organic fertilizer to supplement calcium. Organic fertilizer is rich in nutrients, which can improve the physical structure and chemical properties of soil, enhance the ability of soil water and fertilizer conservation, reduce drought damage, and promote the absorption of calcium and other nutrient elements by vegetables. At the same time, the application of mature organic fertilizer can avoid damage to the root system. Generally, 2000-3000 kg of mature organic fertilizer is applied per mu, and then 30-50 kg of superphosphate is added. The second is to apply lime reasonably and improve the soil. Lime is a commonly used calcium fertilizer. The application of lime in acid soil can not only increase soil pH value, improve soil aggregate structure, but also reduce diseases, increase yield and improve quality. The application amount of lime is related to soil type, pH and vegetable species. Generally, it is suitable to use 40-80 kg lime per mu, lime in sandy soil should be reduced appropriately, and 105-250 kg per mu should be applied when improving soil. Third, deep ploughing and cultivation with plastic film mulching. Deep tillage can fully mature the soil, improve the physical structure and chemical properties of the soil, and enhance its ability of water and fertilizer conservation: plastic film mulching cultivation can maintain the relative stability of soil moisture and reduce the loss of calcium.