After Shouguang in early autumn, can spinach be planted in the high-temperature greenhouse here?

After Shouguang in early autumn, spinach can be planted in the high-temperature greenhouse here. The cultivation characteristics of autumn spinach in greenhouse are that it can grow in the greenhouse without plastic film in the early growth stage (that is, in the open field) and in the greenhouse with plastic film before frost. The harvesting time is165438+1early October. At the same time, it can also be cultivated with plastic film. Planting autumn spinach in greenhouse has considerable economic benefits and simple management methods.

Cultivation techniques of spinach in autumn

Autumn spinach refers to spinach 5438+00 sown in August and marketed in September-June. After "beginning of autumn" (early August), the temperature gradually decreased, the sunshine time gradually shortened, and the climatic conditions were conducive to vegetative growth, which was not conducive to reproductive growth, making it easier to achieve the goal of high yield and high quality.

1, culture time. Sow in August, harvest in batches 30-60 days after sowing, and go on the market from the middle and late September to165438+1October.

2. Choose the right variety. After sowing autumn spinach, the temperature was high in the early stage and gradually decreased in the later stage. Adequate sunshine is suitable for spinach growth, and the sunshine is gradually shortened, making it difficult to develop the duration. Autumn spinach is generally not bolting, so the variety selection is not very strict. Sow early, because the temperature is still relatively high, you can choose a more heat-resistant round-leaf spinach variety; When the sowing date is late, you can choose round leaf spinach varieties or sharp leaf spinach varieties.

3. Seed treatment. When sowing in August, the average daily temperature still affects the germination of spinach seeds, especially when sowing in early August, the average daily temperature often reaches 24-29℃. If seeds are not soaked before sowing to accelerate germination, the emergence of seedlings will be slow and the growth period of leaves will be shortened, which will further affect the yield. The method of soaking seeds and accelerating germination is the same as that of spinach in summer.

4. Choose the land for planting. In the base that meets the production conditions of pollution-free vegetables, choose the soil with abundant sunshine, good drainage and irrigation conditions, loose and fertile soil and neutral acidity. After the previous harvest, dig deep into the soil, remove the residual roots and fully bake and blanch. During soil preparation, 3000 ~ 4000 kg of decomposed organic fertilizer and 0/00 kg of lime/kloc are applied every 666.7 square meters, and then the surface layer of the soil is leveled to make a flat border or a high border. The boundary width is about1.2 ~1.5m. ..

5. Sow at the right time. Spinach is usually broadcast live, and it is mainly broadcast live. Generally from August to September, but also in advance to July or postponed to the beginning of June 10, sowing in stages and batches. You can dry the seeds in the sun, or soak them in well water for 12 hours, then put them in a well or an air-raid shelter to accelerate germination, or put them in a low-temperature refrigerator or freezer at about 4℃ for 24 hours, then accelerate germination at 20℃ ~ 25℃, and sow after germination for 3 ~ 5 days. Before sowing, the bottom water should be poured, and after sowing, the topsoil should be raked lightly to make the seeds fall into the soil gap, and the sunshade net should be covered with straw or small arch shed or flat shed to keep the soil moist, facilitate excavation and prevent high temperature and heavy rain from washing away. Keep the soil moist often, and the seedlings can grow completely in about 6-7 days. Due to the hot and dry climate in autumn, there are sometimes heavy rains, and the growth is poor. The seedlings often die, so it is necessary to sow more, and sow 5 ~ 6 kilograms per 666.7 square meters. In the later period, the temperature gradually decreased, the emergence rate was high, and the sowing amount could be reduced to 3.0-3.5 kg.

6. Cultivation management. In autumn, the temperature and ground temperature of spinach seedlings are high, so it is necessary to water them frequently and lightly to keep the soil moist and reduce the ground temperature, so as to provide good environmental conditions for seedling growth. Autumn spinach is in high temperature and dry weather in the early growth stage. After the real leaves grow, light fertilizer should be poured in time, and then the concentration of topdressing should be gradually increased with the growth of plants and the decrease of temperature. But it should be applied when the soil surface is dry. If the soil is wet, spinach will grow slowly and easily breed diseases. After two real leaves, combine to pull dense seedlings, pull weeds and pay attention to topdressing. Pay attention to the principles of light application, diligent application, light application first and then concentration. Apply more organic manure in the early stage, that is, decomposed manure, especially stop applying manure on 15 days before harvest, and enter the peak period of growth in the later stage. Apply quick-acting nitrogen fertilizer 2 ~ 3 times in stages, and apply urea 5 ~ 10 kg per 666.7 square meters to promote leaf growth, increase production and improve quality.

7. harvest. Autumn spinach has a short growth period, so it should be harvested in time according to the growth and market demand. Generally, when the seedling height is 10 cm, it is pulled out in batches and listed one after another. Pay attention to the spinach with dense harvest and ball bearing before it goes on the market. Generally, after the first pulling, topdressing once and clearing the garden for the second time. When harvesting, the yellow leaves should be removed, washed with clear water and tied into 250 ~ 500 grams. Autumn spinach generally produces 3000-4000 kilograms per mu, and the high yield can reach 5000 kilograms.