First, timely sowing
According to the characteristics of each variety, environmental conditions and market demand, determine the appropriate sowing date. For example, winter radish is the most suitable sowing date in the Yangtze River valley from mid-August to early September. Premature sowing not only has low yield, but also has poor quality, which affects the quality of processed products. Sowing is slow, leaf clusters grow small and yield is low. Another example is the carrot in Hangzhou, which is sown in late September to early October of 10. Early sowing is easy to be hollow, which is not conducive to extending the supply time, while late sowing will result in small plants and low production.
Second, reasonable close planting
Before sowing radish, deep ploughing and sufficient base fertilizer should be applied, and the reasonable planting density should be determined according to the seed size and local soil, fertilizer and water conditions. Can be used on demand, broadcast, broadcast respectively. The row spacing of large radish is 40-50 cm, 2,500-3,000 plants are planted per mu, and the sowing amount is 400-500 grams; Small radishes are sowed, the sowing amount per mu is1000 ~ 2000g, and the distance of the last seedlings is 15~20 days.
Third, fertilization
Radish fertilization should be based on base fertilizer, supplemented by topdressing, that is, 70% of the total fertilization should be used as base fertilizer. In addition to human excrement and urine, the base fertilizer should also be applied in combination with decomposed manure containing complete nitrogen, phosphorus and potassium. For example, farmers in Hangzhou poured human excrement and urine on the border before sowing, and then spread manure on the border after sowing1000 ~15000kg. This can not only prevent heavy rain and drought, but also provide seedlings with sufficient nutrients. During the period from breaking white to bare shoulders, apply human excrement and urine twice, each time per mu 1000~ 1500 kg, and then generally stop chasing the moon to prevent excessive growth and affect the growth of dynamic roots. When topdressing, avoid excessive concentration and pouring near the roots to avoid burning the roots and rotting or hardening the fleshy roots.
Fourth, water
Radish has shallow root system, few lateral roots and weak drought resistance after emergence. In case of drought, water should be done in time to keep enough water in the soil. With the growth of the plant, the water content gradually increases, especially during the vigorous and hypertrophy period of fleshy roots, more attention should be paid to the supply of water. Insufficient water or uneven water supply will affect the normal growth of succulent roots, reduce yield and quality, and are prone to cracking or hollowing. However, too much water will also cause the leaves to grow in vain and even get sick. Drainage should be paid attention to in rainy season, which is beneficial to the deep development of root system.
Five, timely thinning
? Proper shallow tillage, weed removal and pest control are all essential field management work.