Trace elements are indispensable elements for crop growth and are crucial to plant growth and development. Lack of nutrients in soil the lack of different elements will produce different pathological symptoms for plant growth: various nutrients in soil play a vital role in plant growth.
1. Nitrogen:
The concentration required by normal plants is between 1%-5%. Its function is to increase chlorophyll and promote protein synthesis. The plants will grow slowly, obviously short, and their leaves will turn yellow when they are short of nitrogen; The leaves became brown and died in severe nitrogen deficiency.
2. Phosphorus:
The required concentration of normal plants is between 0.1%-0.4%. Its important role is to store and transport energy, obtain energy from photosynthesis and carbohydrate metabolism and store energy in phosphate compounds for future growth, breeding and utilization. Phosphorus deficiency will restrict the growth of the whole plant, and it is rare to see the obvious leaf symptoms like that of other elements.
3. Potassium:
The concentration required by normal plants is between 1%-5%. Potassium exists as an active ion under normal conditions. Its main function is catalysis: 1. Enzyme activation 2. Balancing water 3. Participating in energy formation 4. Participating in the process of assimilates (improving crop sugar content) 5. Participating in nitrogen absorption and protein synthesis.
4. Calcium:
The concentration required for normal plants is between 0.2% and 1.0%, and calcium plays an important role in cell elongation and division. When the plant is short of calcium, the top bud and root tip of the plant do not develop, and the growth point stops growing. Calcium deficiency often causes tomato to suffer from navel rot, apple to suffer from pitching, and the fruit lacks hardness.
