Cultivation Techniques of Radish in Greenhouse in Early Spring

In early spring, it is cultivated in plastic greenhouses. The method is simple, requires less labor, and is lighter in pests and diseases. It is the best variety for agricultural structure adjustment and large-scale planting. In the spring of 1999, we introduced more than 20 acres of planting, produced more than 2500 kg of radish per mu, and earned an income of more than 4,000 yuan per mu. The economic benefits are very significant. Now we introduce the main cultivation techniques as follows:

1. Variety selection. In early spring, due to the low temperature, it is easy for bolting of radish. Therefore, it is advisable to choose varieties with strong winter characteristics and strict requirements for vernalization, such as Chunbai No. 2, greenhouse roots, and Bai Yuchun.

2. Land selection, deep ploughing and applying base fertilizer. The sandy loam soil with a deep soil layer is selected as *. Ploughing should be done in the greenhouse as early as possible. When the time is sufficient, the soil can be frozen for 7-10 days to facilitate loosening. Apply sufficient base fertilizer, apply 3500 kg of rotted organic fertilizer per mu, 40 kg of high-efficiency compound fertilizer, 2 kg of biological potash fertilizer, and 100 kg of grass ash. Make 2 borders in the shed, and it is required to prepare the soil to be loose soil, flat border, and evenly crushed soil.

3. Sowing and fixing seedlings. According to market conditions, it can be planted in stages from mid-December to late February. Our country is suitable for the middle and late January. 6 rows per border, plant spacing 30 cm, sow 2 grains per hole. After the emergence of seedlings, one seedling is left, leaving one sturdy seedling per hole. Sowing volume is 100 grams per mu. Before sowing, the border should be poured thoroughly to facilitate seedling emergence.

4. Field management. The seedling stage is in the local coldest January, watering should be as little as possible, and a small arch shed inside the shed should be used for heat insulation to reduce the time when the temperature below 10 ℃ occurs in the shed, to prevent the occurrence of low temperatures below 0 ℃, to ensure that it does not pass the vernalization and Frost damage promotes the growth of rosette leaves. After the victory, the manure and urine should be applied one time after watering, and the border must be kept moist at all times in the future. Avoid excessive alternation of dry and wet, causing cracking of the fleshy root. The weather temperature has gradually increased during this period, and attention should be paid to ventilation and cooling. The temperature during the day should be maintained at 20-25 ° C and the temperature at night 15 ° C, to facilitate the accumulation and expansion of nutrients of fleshy roots.

5. Prevention of diseases and insect pests. The diseases of radishes in greenhouses are mainly in the period of fleshy root enlargement. The black rot caused by high temperature and high humidity can be prevented by strengthening ventilation and cooling. Insect pests are mainly aphids, you can choose 10% imidacloprid wettable powder 2500 times liquid spray control.

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