Every winter season, warm winter shed cultivation of cucumbers, eggplants, melons and other melons and fruits is affected by snow and rain, often resulting in poor lighting, low shed temperature, low ground temperature, and insufficient supply of carbon dioxide in the shed, which directly affects plant growth. Fruit production and appearance quality. In addition to strengthening the conventional measures in management, it is also a good technique to cover wheatgrass scientifically in greenhouses, which will greatly improve the photosynthetic efficiency of plants. Its scientific basis and management measures are as follows: 1. Everyone knows that the growth of any plant cannot be separated from sunlight, temperature, moisture, and carbon dioxide. Sunlight and temperature are external factors, and water and carbon dioxide can be supplemented by artificial means. Carbohydrates are The basic composition of organic matter accounts for more than 96% of the entire green plant body. Therefore, the carbon source (organic carbon source) is artificially added to the greenhouse, which is very beneficial to the growth and development of melon plants. According to reliable data, 4 kg of carbon dioxide can be released per kg of straw (straw). It can effectively supplement the shortage of carbon dioxide in the greenhouse and promote the growth of fruit and fruit quality in the deep winter season. Second, the specific management measures 1, first in the shed in the front side of the tunnel to dig things east and deep, 15 to 20 cm deep, 10 to 15 cm wide ditch, fill in 10 to 15 cm of crushed straw (or straw), such as Zaisa Into the amount of urea better. Then cover the earth about 5 centimeters and fill with water after compaction. This will not only help protect the shed front temperature, but also help to supplement the carbon dioxide in the shed. Some rapeseed and coriander leaf vegetables can also be cultivated at this site. 2, cultivation of cucumber, eggplant, cantaloupe melons and other fruits need to be ridge cultivation, large ridges should be deep, small ditch should be shallow, we must compact the ridge soil, it is best to use ditch irrigation dark cast, full shed film cover. Every 5 to 5 furrows in Dagou is lined with 5 cm thick wheat straw. After appropriate amount of biological bacterial fertilizer is applied, it is covered with plastic film. However, it is necessary to leave gaps so that the carbon dioxide produced by biological fermentation can be discharged into the shed. 3, disease prevention and pest control: vegetable pollution-free cultivation requirements in recent years more and more stringent, can be applied before transplanting planting bio-organic fertilizer after planting water, reducing the short-term seedling period, timely and appropriate amount of potassium sulfate in the small ditch Water fertilization, chasing sulfur and potassium fertilizers on the inside of the furrow covered with wheat straw, can effectively reduce the root rot, burning roots and other diseases, and promote the root more than seedlings. In the 7-10 days of seedling stage, spraying Tianda 2116 plus bulloxin once every 2 to 3 times to prevent seedling disease. During the entire period of growth of fruits and vegetables, the healthy plants were cultivated, and the Guaida Fruit Tianda 2116 plus Tiandaaceticin was used to prevent the whitefly and aphids in the greenhouse. For other pests, avermectin, diflubenzuron and tebufenac were selected. Biochemical pesticides were sprayed alternately. In addition, we must control the temperature and humidity, not only to prevent the temperature of the greenhouse from affecting the ground temperature too low, but also to prevent the greenhouse temperature caused by too high. Ditching wheatgrass to maintain the ground temperature, to prevent cold root damage has a good effect.
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