1. Essential elements refer to plant nutrient elements that are necessary for the normal growth and development of plants and cannot be replaced by other elements. According to the needs of plants, essential elements are divided into essential macro elements and essential trace elements.
2. The essential macroelements are carbon, hydrogen, oxygen, nitrogen, phosphorus, sulfur, potassium, magnesium, calcium and silicon;
3. The essential trace elements are iron, manganese, zinc, copper, boron, molybdenum, chlorine, sodium and nickel.
Amino acids can also be used as complexing agents. Macroelements such as nitrogen, phosphorus and potassium and trace elements such as zinc, iron, copper, manganese, boron and molybdenum are essential substances for crops. Crops often have symptoms of lack of some elements, because the content of effective parts that crops can absorb is too small, and amino acids can chelate with insoluble elements to protect the elements needed by crops and generate chelates with good solubility and easy absorption by crops, which is beneficial to plant absorption.
First of all, five conditions for plant growth.
1, lighting
Light is one of the most indispensable conditions for plant growth. Generally, plants need scattered light to maintain normal life activities, promote photosynthesis, accelerate the synthesis of chlorophyll in chloroplasts, and give appropriate illumination time to ensure the full growth of plant leaves.
Step 2: Moisture
Water is an indispensable condition for maintaining plant growth. Plants mainly absorb water in the air through leaves and water in the soil through roots, so as to ensure that plants can grow in an environment with sufficient water and avoid the phenomenon of dry, withered and aging of plant branches and leaves.
3. Temperature
Temperature will affect the differentiation of plant buds and branches and the growth rate of the whole plant. In the case of high temperature, plants will go into dormancy and the growth rate will become slow. At low temperature, the leaves of plants will be frostbitten, resulting in withering, rot and necrosis.
4. Air
Air is one of the indispensable conditions for plant growth, which contains a lot of gases such as oxygen, nitrogen and carbon dioxide. It is a necessary substance for photosynthesis and respiration of plants. Humid air environment is usually conducive to the growth and development of plants.
5, all kinds of minerals
Soil will contain a lot of minerals and trace elements, which can provide sufficient nutrients for the growth of plants. When the plant stems grow, the absorption of nitrogen and phosphorus can accelerate the growth, and when the plant leaves grow, the absorption of potassium can ensure that the leaves grow more vigorously.