Types of nitrogen fertilizer
Nitrogen fertilizer can be divided into animal nitrogen fertilizer and plant nitrogen fertilizer. Animal nitrogen fertilizer such as human excretion, horses, sheep, pigs, etc., fish fertilizer, horses, etc., plant nitrogen fertilizer such as bean cakes, rapeseed cakes, cottonseed cakes, sesame residues, etc. These two are organic fertilizer; inorganic fertilizer is like Urea, ammonia, ammonium nitrate, ammonium sulfate, etc. are all fast nitrogen fertilizers, which are generally used as topdressing, but often use it to cause soil plates.
Nitrogen fertilizer can promote lush trees, increase chlorophyll, and supplement the nutrition of plant growth. Too much nitrogen fertilizer can lead to soft plant tissue, long stems and leaves, and are susceptible to diseases and insects, reducing the cold resistance of plants; excessive nitrogen fertilizer can make the plant short, yellow and green leaves, slow growth, and cannot bloom.
Types of phosphorus fertilizer
Bone powder, rice bran, fish scales, poultry feces are organic fertilizer containing more phosphorus, calcium phosphate, phosphate powder, and calcium and magnesium phosphate fertilizer are inorganic phosphorus fertilizers.
Phosphorus fertilizer can promote the toughness of the plant’s stems, the formation of flower buds and flowering, and premature fruit, and improve the cold resistance of plants. Plants lack phosphorus fertilizer slowly, small flowers and fruits, and small fruits, and late fruits.
Types of potassium fertilizer
Herbal ash is a type of organic potassium fertilizer, which can be used as basic fertilizer and topdressing; potassium nitrate and potassium dihydrogen phosphate can be used for spraying of potted plants.
Potassium fertilizer can promote the strong stems of the plant, improve the ability of plant resistance to disease, insect resistance, drought, resistance, and anti -falling capacity, make its root system developed, and improve the quality of fruits. Too much potassium fertilizer will shorten the plant interview, dwarf the plant body, and yellowish leaf color, which will cause death. When the lack of potassium fertilizer, the plant’s leaf margin will appear necrotic spots, and then the burnt necrosis will occur.