Rainfall is a critical period for vegetable seedlings in spring and early vegetable planting in greenhouses. During this period, temperatures in Beijing gradually increase, and the light gradually increases. The number of sunshine hours per day gradually increases, but cold waves still occur. Therefore, it is necessary to focus on facilities protection. Land management and nursery and organic fertilizer composting and preparation work. Early spring Colonization of vegetables The greenhouse vegetables such as tomatoes, cucumbers, eggplants, and peppers are suitable for planting in mid-to late-mid-February, and management measures in the following areas must be grasped. â– The best time to keep the minimum temperature in the greenhouse stable at 10°C for more than 5°C for 5 consecutive days and 12°C above 10cm. Select the timing of cold head warming, that is, the cold air will soon pass and the warm air will come soon. . â– Fertilization in advance of site preparation should be completed in 15 days in advance. To improve the quality of soil preparation and planting, apply organic fertilizer as base fertilizer. Each mus of crushed fine organic fertilizer over 5,000 kilograms or 3,000 kilograms of bio-organic fertilizer, made of sorghum 20 centimeters higher than the ground, according to different crops to determine the spacing between the pods, the general tomato and cucumber in accordance with the spacing of 1.4-1.5 meters to do a畦 畦 畦 畦 畦 畦 畦 畦 畦 å¤§å° ç•¦ å¤§å° ç•¦ 畦 畦 畦 畦 畦 畦 畦 畦 畦 畦 畦 畦 畦 畦 畦. After making a rake, drip tape is applied to cover the mulch. â– Density of planting Density of planting depends on different crops and varieties. Ordinary tomato and cucumber varieties range from 3,000 to 3500 per acre with an average spacing of 70-75 cm and a plant spacing of 30-35 cm; cherry tomatoes, imported tomatoes and fruit-type cucumber varieties The density is about 2200 per acre, with an average spacing of 75 cm and a spacing of 40 cm. â– The quality of planting should be the same as the size of the strong seedling colonization. Each row of two rows should be planted on the same level, and rooting should be minimized. Tomatoes, eggplants and other solanaceous fruit crops should be properly planted, cover soil 2 cm higher than seedlings; cucumbers, wax gourd and other melons should be planted in shallow, cover soil and seedlings are suitable. Watering in time after planting, if the ground temperature is low when planting, water method can be used. After 5-7 days, planting water should be poured. In addition, when planting, plant more than 4-5 plants per row in each row to prepare for seedlings. Greenhouse spring radish and cabbage Sowing seedlings In mid-to late-February, it is appropriate to sow cabbage, white radish and other radishes in the greenhouse in early spring. If Chinese cabbage is transplanted by nursery, it can be planted in mid-January and planted in late February. Cabbage should choose good quality, short growing period, strong cold resistance of the "King Chun Huang No. 2" varieties; white radish should choose more stringent vernal requirements, pumping late, not hollow hollow "Spring Jade Root" and other varieties. Note that the night temperature after emergence is not lower than 13°C to prevent vernalization convulsions. About 10 days in advance of fertilization, about 5 mu of quality organic fertilizer and 2500 kg of bio-organic fertilizer are used per acre. The radish is made of sorghum 20 cm above the ground. The row spacing is 55-60 cm and the spacing is 20 cm. About 5500 acres; cabbage made of double rows of small sorghum, the average spacing of 55-60 cm, spacing 30-33 cm, about 3,000 per acre. After covering the mulch with pods, the sensation should be appropriate when sowing. Winter vegetables fine management At present, it is the critical period for wintering and hoeing vegetables in greenhouses. The first is to keep warm and cold, and pay attention to changes in weather at any time to prevent cold currents and even cloudy weather from harming the crops. If necessary, it is necessary to adopt Yuba or warming combustion blocks or Heating blast furnace and other temporary heating measures. Diligently scrub the film and increase the light transmittance. The second is to timely pruning and falling vines tip to assist in pollination, sparse excess buds and fruits. The third method is to scientifically apply water and topdressing fertilizers. Top dressing should be performed with drip irrigation and nutrient solution with reasonable nutrients such as “Xinshuâ€, which is suitable for fast-dissolving fertilizers. It is also possible to apply nitrogen, phosphorus, and potassium to algae acids or humic acid organic liquid fertilizers. In the greenhouse, set the reservoir, storage tank or barrel, until the water temperature rises about 18 °C and then water, but also pay attention to the ground water, to avoid flood irrigation, to prevent the sudden drop in ground temperature and affect the root growth And absorb moisture and nutrients. The fourth is to harvest in the best commodity period, and the appearance should be beautiful and tidy. Therefore, we must improve the quality of refurbishment and increase the value of commodities. Cultivate strong seedlings â— Spring sheds melon seedlings Cucumbers, zucchini, pumpkins, wax gourds, watermelons, melons and other melons grown in greenhouses in early spring, Daxing, Shunyi and other plains are sown in mid-February and planted in late March; Miyun, Huairou and Yanqing The northern mountainous areas are sown in late February and planted in early April. Use 32-hole or 50-hole trays or 88-cm-size seedlings for nutrition, using peat and vermiculite as the substrate. If the ground temperature is lower than 15°C, a geothermal heating line and a temperature controller should be installed to increase the ground temperature. Melons should be selected from the early maturity, good quality, "a string of Ling 4", and the use of the "custard 36" and other fine varieties. The method of grafting seedlings enhances the cold resistance and disease resistance of plants. â— Solanum lycopersicum planting crops in spring exposed areas Covered with mulching cultivars Pepper, tomato, eggplant and other eggplant fruits are planted in late February and planted in late April. The use of lighting, good insulation properties of greenhouse nursery, tomatoes, etc. using 50 or 72-hole plastic plug or 66 cm specifications of the nutrition seedlings nursery, use of soilless nursery special substrate, can also be used peat, vermiculite own preparation of the substrate, the ratio is 2 to 1 added 30 kg of bio-organic fertilizer per cubic meter of substrate. If the ground temperature is lower than 15°C, a geothermal heating line and a temperature controller should be installed to increase the ground temperature. Eggplant should use good varieties such as "Jingejing No. 1" with early maturity, good quality, and strong disease resistance. Do seed soaking in warm soup and soaking in pesticides. Select sowing in sunny days, sow one seed per hole, and sow 2 seeds at 5-6 points of each edge of the plug to make up for seedlings. â— Managed seedlings Seedlings such as eggplants, melons, and leaves that have been bred have to be strengthened with seedbed management. The first is that the seedlings raised from common seedbeds should be seeded in a timely manner, and nutrition pods should be used to protect the seedlings. Secondly, special attention should be paid to adjusting the appropriate temperature in time to prevent cold and heat insulation. Especially in extreme cold weather, the ground temperature is particularly important. Install the Yuba, the ground heating line, the air heating line, the electric heater, and the use of warming combustion blocks. Warm measures to ensure the seedlings are not frozen. The third must be tomatoes, cucumbers and other thermophilic crops and lettuce, celery and other cold-resistant crops separately coded in different temperature zones, and every other week about the exchange of seedling plate position, so that seedlings grow evenly; keep the night temperature not lower At 13°C, the seedlings of tomato and cabbage are particularly important. The fourth is to ensure seedlings have stronger light after emergence, and make it more visible light, install fill light to artificial fill light, open on cloudy days for about 12 hours, open the grass after the sunny open 4-5 hours. The fifth is to do a good job of watering, top dressing and foliar spray fertilizer management. At this time, the temperature is still low, and buckets should be placed in the shed. After 3 days, the water temperature rises above 18°C ​​and then poured, every 7 days. The left and right leaves are sprayed once and can use Rayleigh alginate or potassium dihydrogen phosphate. Storage and Management of Storage Vegetables, radishes, carrots, celery, etc., must be stockpiled and sold in advance. The cabbages stored in live cellars can be listed after refurbishment, and the stored cabbage, celery, spinach, etc. must be gradually warmed up after the storage. The method, do not immediately put into the high temperature environment after the pit immediately warmed up to prevent the reduction of commercial property. Regularly check the storage temperature is appropriate, insulation measures are appropriate, such as the temperature is too low or too high, timely increase or decrease the thickness of the soil cover or insulation material; live storage cellar cabbage regularly to pour vegetables, timely removal of yellow leaves and rotten leaves . Organic fertilizer composting and purchase Do a good job of organic manure composting. Prepare chicken manure, pig manure, sheep manure, etc. without composting organic fertilizer. Add 5 kg to 10 kg of accelerating and decomposing bacteria to each side and turn it over once every 15 days. In the application, it should reach the standard of full maturity and crushing. Do not use unripe organic fertilizer directly so as to avoid severe adverse effects caused by rooting, burning seedlings and underground pests. The source of organic fertilizer is insufficient to purchase good quality organic fertilizer in advance. In order to improve the quality of vegetables, fully apply sheep manure that is fully rotted and added with biological bacteria. Tomatoes, cucumbers, and other melons and fruit crops in the amount of 3,000 kg per mu; rape, lettuce and other leaf crops in the amount of 1500 kg -2000 kg per mu. 720P 1080P Baby Monitor,1080P Baby Monitor,720P Baby Monitor,Wireless Baby Monitor Shenzhen Zuomi Technology Co., Ltd. , https://www.leftriceptz.com