Fertilization technology of radish

Radish and carrot are root vegetables. They are eaten by people with fat fleshy roots. For every 1000 kg of radish, it is necessary to absorb 2.1 kg of nitrogen (N), 0.8 kg of phosphorus (P2O5) and 3.8 kg of potassium (K2O) 5.6 kg from the soil. The ratio of the three is 1-0. 2-0. 8, which shows that radish is a potassium-loving crop.

The absorption of nitrogen, phosphorus and potassium by radish varies greatly in different growth stages. Generally, the absorption of nitrogen in seedling stage is more than that of phosphorus and potassium. In the early stage of fleshy root expansion, the potassium uptake of plants increased significantly, followed by nitrogen and phosphorus, and the peak of nutrient absorption was in the peak period of fleshy root expansion, which accounted for 77.3% of the total nitrogen uptake in the whole growth period. the amount of phosphorus uptake accounted for 82.9% of the total phosphorus absorption, and potassium absorption accounted for 76.6% of the total potassium absorption. Therefore, ensuring adequate nutrition in this period is the key to the high yield of radish.

Key points of fertilization techniques:

The main results are as follows: (1) there are generally more than 2000 kg of rotten fertilizer per mu, combined with phosphorus and potassium fertilizer.

(2) topdressing, on the basis of proper topdressing in the early stage, when radish belly was broken, combined with irrigation, urea was applied to 10 kg per mu. The application of nitrogen fertilizer should not be too much or too late, and should be applied before the peak period of radish expansion as far as possible. if applied too much or too late, it will easily break the fleshy root or produce bitterness and affect the quality of radish. In the peak period of radish expansion, more potash fertilizer is needed. In addition, attention should be paid to nutrient balance. It is reported that the application of ternary compound fertilizer can increase the yield and improve the quality of radish compared with urea alone.