At present, it is the greenhouse vegetable production season. We now provide some concrete measures on how to improve its economic benefits for reference by farmers. First, planting high-efficiency varieties should be used in the absence of greenhouse protection facilities can not produce or can not grow normally, but also is the market efficiency, high yield, good quality, high economic efficiency of the vegetable species, such as citron, cucumber, zucchini, watermelon, Tomato, pepper, eggplant, oyster mushroom and so on. And some cold-resistant vegetables or vegetables that have been easily covered and stored in the winter and spring. Second, increase the cropping index The economic benefits of greenhouse vegetables are mainly from before and after the Spring Festival to the year before May. In order to improve the planting efficiency of greenhouses, we should actively promote the three-dimensional and three-dimensional efficient cultivation mode, according to the different growth characteristics of different vegetables, select suitable varieties, arrange the cornices rationally, adopt multi-planting, intercropping, three-dimensional cultivation and other forms. Increase the multiple cropping index of shed vegetables. Third, close planting promotes early production. Take cucumber as an example. The density per 1/15 hectares can be increased to 6,000. The main and deputy rows are used for cultivation. When cucumbers grow up to 12 leaves, the heart is picked and 4 melons are left. After cultivation, the main plant grows to 25 leaves and then removes and adds to maintain 3000-3300 strains per 1/15 hectare. This method can generally increase production and increase value by more than 20%. Fourth, the garden soil disinfection greenhouse vegetables due to the number of consecutive crops, the general disease is more serious, with garden soil disinfection chemical pesticides can kill pathogens to spread the disease through the soil, reduce the incidence rate. 3 to 5 grams of carbendazim or 300 grams of brominated methanol was injected into each bed of soil to sterilize. Fifth, the double-layer insulation adopts double-layer insulation measures, that is, to cover the plastic film or set a small arch shed in the greenhouse. According to the relevant test, covering the film in the shed can increase the ground temperature by 2°C. Setting a small shed in the shed can keep the temperature in the small arch shed above 15°C. Sixth, look at the city under the cultivation of vegetables in greenhouses under the market conditions to be determined, targeting the market gap, Shibu replacement, and more development of fine, high-grade vegetables. As long as we take a good grasp of the listing season, we can achieve greater benefits in the time difference. Seven, the use of growth regulators shed vegetables application paclobutrazol, anti-dropping agent, tomato spirit, naphthalene acetate, ethephon and other growth regulators, can control the growth, prevent falling flowers, promote early maturing and high yield. 8. Spraying rare earth liquid Spraying 0.2% to 0.5% rare earth nitrate solution at the seedling and initial flowering stages of solanaceous vegetables can significantly increase vegetable yield and improve quality. 9. Grafting cucumbers in greenhouses. If grafted with black-skinned squash or Nan-an No.1, it can prevent and cure various diseases of cucumbers and increase production by more than 25%. Ten, prevent ammonia damage According to the determination, the concentration of ammonia in the air exceeds 510-6 that will cause the vegetable stems and leaves to be necrotic, so in the greenhouse cultivation of vegetables, first of all should control the use of nitrogen fertilizer, in the timely use of nitrogen fertilizer watering Fertilizer deep application and cover soil, pay attention to window ventilation, prevent ammonia hazards. 11. Set a light curtain to set a light curtain in the low light on the north side of the vegetable greenhouse, which can significantly enhance the light on the north side of the vegetable greenhouse and increase the ground temperature by 1.5 to 3°C. + Second, the release of biogas This method can not only warm the shed, but also to supplement the carbon dioxide gas for vegetables, the "four in one" greenhouse cucumber, green peppers, cauliflower and other vegetables test, in the growing season of vegetables, the release of biogas Greenhouse vegetables generally increase production by 20% to 40%. 13. Use of drip-irrigated greenhouse vegetables for drip irrigation and water saving technology under the plastic film can reduce the relative humidity of the air in the shed by 10%, reduce the mixed disease index by 8%, and increase production by 10%-15%. 14. Using plant ash to evenly apply ash to the ground can increase the ground temperature and reduce soil moisture. If grass ash is applied to the soil layer, it can loosen the soil, increase fertility, and improve the stress resistance of the seedlings. Fifteen, switch to the use of non-drop film using PVC no drip film, greenhouse water vapor will not condense into water droplets in the film on the greenhouse, the greenhouse structure of the shed does not affect the shading, light transmittance remained at about 90%, Photosynthesis of vegetables can be guaranteed.
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