Relationship between fertilization and vegetable quality

The quality of vegetables is closely related to fertilization, and the quality of vegetables can be improved by means of regulation. Insufficient or excessive nutrients will affect the quality of vegetables, such as insufficient nitrogen supply will lead to insufficient growth of vegetables, small, yellow leaves; lack of calcium and boron will lead to fruit deformities and so on. Balanced supply of nutrients also directly affects the formation of vegetable flavor, for example, excessive nitrogen application will make cucumber bitter; nitrogen will also affect the synthesis of capsaicin and dihydrocapsaicin; insufficient potassium supply will lead to poor palatability of melons; balanced supply of nitrogen, potassium, sulfur and other elements can promote the formation of special flavor substances in vegetables such as bulb cabbage. The formation of the special flavor of onion, onion and garlic is closely related to the supply of vegetables.

The nutritional quality of vegetables is closely related to the supply of nitrogen, phosphorus, potassium and medium and trace elements. For example, nitrogen can increase the content of protein, amino acid and carotene in vegetable plants; under salt stress, calcium application can increase the yield of cucumber and increase the content of soluble sugar. The supply of potassium plays an important role in the growth and development of some vegetables and can increase the content of vitamin C. The application of mineral elements can increase the content of trace elements which play an important role in human body.

The increase of nitrate content in leafy vegetables is mainly related to the excessive application of nitrogen. Proper selection of nitrogen fertilizer and proper application of nitrogen can produce vegetables with almost no nitrate. Other nutrient elements also play an important role in nitrate metabolism of vegetable plants.

Thus it can be seen that soil testing and formula fertilization is an important measure to improve the quality, yield and income of vegetables.