Calcium is an indispensable element in the growth and development of vegetable crops, and most vegetables are calcium-loving. In the case of insufficient calcium, it may cause crop physiological disorders, plant growth is blocked, fruit and vegetables are not strong, or other physiological diseases occur. In recent years, not only the lack of calcium in the cultivation of exposed vegetables, but also the deficiency of calcium in protected vegetables is more serious.
So, how should the calcium deficiency of vegetables be “filled up� The following methods are mainly used:
First, the application of decomposed organic fertilizer, bottom fertilizer, calcium,
Organic fertilizers are rich in nutrients, can improve soil physical structure and chemical properties, improve soil water and fertilizer retention capacity, reduce drought damage, and promote the absorption of calcium and other nutrients. At the same time, the decomposed organic fertilizer can avoid damage to the root system. Generally, 2000-3000 kg of decomposed organic fertilizer is applied per mu in combination with cultivated land, and then 30 to 50 kg of superphosphate is added.
The second is to rationally apply lime, change soil and soil,
Lime is a commonly used calcium fertilizer. Applying lime on acidic soil is beneficial to increase soil pH, improve soil structure, and also reduce disease, increase crop yield and improve quality. The amount of lime applied is related to soil type, pH, and crop type. Generally, 40 to 80 kg of quicklime or slaked lime per acre is suitable. The amount of lime in sandy soil should be appropriately reduced. When used for soil improvement, 150-250 kg should be applied per mu.
The third is deep ploughing, plastic film mulching cultivation
Deep ploughing can fully mature the soil, improve the physical and chemical properties of the soil, enhance the ability of water retention and fertilizer conservation; use mulching to maintain the relative stability of soil moisture and reduce the loss of calcium.
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