At the same time, the application of medium and trace elements is not paid enough attention, and the lack of medium and trace elements often becomes a short board in the "barrel effect", including calcium, which is called the fourth largest nutrient element in plant growth. As the Spring Festival approaches, the price of agricultural products in greenhouses is close to the peak, but it is also the period that is most prone to calcium deficiency due to low temperature and low sunshine.
What role does calcium play in crop growth? What are the symptoms of calcium deficiency in crops? What measures can be taken to ensure the adequate supply of calcium fertilizer?
This paper will answer the above questions in combination with production practice. While providing reference for producers, it is hoped that producers will pay more attention to medium and trace elements in the process of cultivation management to ensure high yield.
1. What important role does calcium play in crop growth and development? Calcium is an essential element for plants, and it is also an important carrier for plant growth and development to transmit information. It plays an important role in enhancing the adaptability of crops under adverse environmental conditions, improving the inherent quality of crops, prolonging shelf life and improving disease resistance.
1, enhance the adaptability to adversity such as drought and flood.
Adjust the opening and closing of stomata more quickly under drought conditions.
Under drought conditions, calcium ion, as the transmitter of external environmental information, will timely transmit the information of water shortage to substances (enzymes) that regulate plant physiological activities, and plants will issue instructions to deal with this adversity, that is, reduce the intensity of transpiration and the evaporation of water in plants by wilting and reducing leaf area, thus minimizing the impact of drought on normal physiological activities.
Aquatic crops transport oxygen more smoothly.
Oxygen is a necessary raw material for plants to breathe. Plants can only decompose the substances produced by photosynthesis through respiration and convert them into energy for their own growth. Only under the condition of sufficient oxygen supply can the roots of plants grow well and establish the root community of healthy growth of crops.
But for aquatic crops such as rice and lotus root, under the condition of flooding, the roots can't absorb oxygen from the soil like tomatoes and cucumbers, but transport it to the roots through leaves, stems and other organs. Therefore, the efficiency of the transport catheter directly determines the development of its roots, and calcium can enhance the toughness and transport strength of the catheter, thus ensuring the adequate supply of oxygen at the roots.
Step 2 improve resistance
Improve disease resistance
The leaves, fruits and other organs of plants are the same as those of humans. Cells are constantly undergoing metabolism, and apoptotic cells will temporarily cover the surface of organs, forming a protective layer (similar to the outermost layer of human skin) and forming the stratum corneum. Cell walls are calcium-rich areas. After apoptosis, the calcium in the cell wall remains in the cell wall, which increases the strength of the cell wall. Thus, the protective ability of the stratum corneum, a protective wall, to internal living cells is enhanced, and the ability to resist the invasion of germs is stronger.