Nutritional effects of phosphorus (P) and boron (B): (1)P is a component of nucleus and nucleic acid, which plays a special role in plant life and genetic process; Phospholipids contain phosphorus, which is an important component of biofilm. There is phosphorus in adenosine triphosphate, which is a transfer station of energy in plants and actively participates in energy metabolism. Phosphorus is a participant in various metabolic processes of plants, such as the transport of phosphorus compounds, the synthesis of sucrose, starch and polysaccharide.

(2) The nutritional functions of B are: promoting the transport and metabolism of carbohydrates in plants; Participate in the synthesis of hemicellulose and related cell wall substances; Promote cell elongation and cell division; Promote the establishment and development of reproductive organs; Regulating phenol metabolism and lignification; Boron can also improve the nitrogen fixation ability of rhizobia in leguminous crops.