In early spring, there are more rains, lower temperatures and less sunshine. These unfavorable factors often lead to failure of nursery. Here's a melon early spring greenhouse nursery technology, the author combines years of experience in production from the experience, introduced to everyone for reference. Varieties should be dominated by early-maturing, medium-mature and high-quality varieties, and they should be suitable for moderate-late-maturing varieties. At present, the light skin melons produced and used in greenhouses mainly include Yujinxiang, Longtang No.1, Elizabeth, etc. The reticulated melons have Tianmi and Xiangmi. Shed melons must be nursed in the greenhouse, and the cultivation of strong seedlings is the main part of the melon planting. The criteria for strong seedlings are complete hypertrophy of cotyledon, thick embryonic axis, deeper leaf color, and short internodes. The seedling age is 28 to 32 days. Nursery must have certain equipment, can use electric hotbeds, hot stuffing hotbeds, firebed hotbeds, etc. Nowadays, electric hotbeds are commonly used. When the greenhouse temperature is stable above 12°C, planting can be achieved. The melon seedling period is roughly 1 month or so, so pushing forward for another month or so is the sowing date. Sowing and nursery are often conducted in a warming greenhouse. It is advisable to plant in the southern part of the province in early February. If the insulation conditions are good, the seedlings can be raised as early as January. Pre-seeding seeds are processed. Seeds sown after sowing, miscellaneous, debriding, drying and then seed treatment, thiophanate-methyl or carbendazim 500 ~ 600 times liquid soaking sterilization for 15 minutes, remove and put into the clean water, The virus was inactivated by soaking in a solution of 15% trisodium phosphate for 30 minutes. Then soak in hot water of 55°C for 10 minutes, continue stirring until 30°C and then soak for 2 hours. Remove the moisture from the seed coat and clean the seeds with a clean cloth and place it under a constant temperature of 28°C to 30°C. Germination (different germination methods can be performed in a constant temperature box, or using electric blankets, fermented manure piles, etc.). The author proposes to soak germination at noon and sow the seeds the next morning, otherwise the seed buds will be easily broken when planting for too long. Nutritional preparation and sowing. Nutrition can be made on its own or you can buy different specifications of plastic nutrition. The size of the nutritional bowl may be 10 cm 10 cm or 8 cm 8 cm or 8 cm 10 cm, and the minimum is not less than 6 cm 6 cm. Nutrient soils are prepared from field soil, river mud, various livestock manures, and human dung, which have not been planted with melon crops. All manure must be fully decomposed. The proportion of the preparation was 5 for Daejeon, 4 for decomposed manure, 1 for river mud, 0.5 kg for urea, 1.5 kg for superphosphate, and 0.5 kg for potassium sulfate per cubic meter of nutrient soil. In order to improve disease resistance at the seedling stage and reduce dead seedlings, it is advisable to add an appropriate amount of microbiological fertilizer, such as soil Yijia, Yiwei, and heavy mash 100. The nutrient soil is sifted before mixing, and then mixed uniformly. Disinfection of bed soil is the key part of the seedling raising technology. The treatment can be carried out in a fundamental way to prevent the occurrence of soil-borne diseases such as damping-off, root rot and blight in the seedling stage. Treatment methods: first soaked bed soil or nutrients, disinfection before sowing the following methods: every 10 to 15 square meters of seedbed with sea gold or Haitian force 25 ml, plus transplanting 10 ml of water evenly sprayed 15 kg. The nutrient bowl of the seedbed is sprayed once with a watering can and can be sown after drying for 4 to 6 hours. Place 1 seed in each nutrient bowl and cover the soil 1 to 1.5 cm thick after sowing. Then cover the mulch to keep the bed moist and increase the temperature of the nutrient pods. When the seedlings emerge, remove the mulch immediately to allow the seedlings to emerge. Seedbed management to control the temperature as the center, closed before emergence, no ventilation, the bed temperature during the day to maintain 30 °C ~ 35 °C, night 17 °C ~ 20 °C. Once the young shoots begin to unearth, they should pay due attention to ventilation, because from the seedlings unearthed to the cotyledon flat, the hypocotyls grow fastest during this period, which is the most vulnerable stage of seedlings, so pay special attention to control the length of the melon seedlings, its measures There are three: First, the bed temperature is reduced to 15 °C ~ 22 °C; Second, as long as possible to extend the lighting time, to ensure the normal development of seedlings; Third, reduce the bed air and soil moisture, air relative humidity during the day 50% ~ 60%, at night 70% to 80%. When the true leaves appear, the seedlings are not easy to grow, and the bed temperature should be raised to 25°C to 30°C again. After two true leaves of the seedlings, the bed temperature should be lowered, watering should be controlled, and exercise before colonization should be performed. Components Of Infusion Set
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