How to plant plum trees in greenhouse?

How to plant plum trees in greenhouse? How to manage planting plum trees in greenhouse? Please give guidance for greenhouse planting plum trees can be managed with reference to the following methods: first, greenhouse construction and production regulations greenhouse is made from ordinary winter warm vegetable greenhouse, and the varieties are 3-year-old early Beauty plum and Moltney plum. The row spacing is 1.8 × 2.5 meters, east-west. After taking the natural happy shape of multi-main branches and improved trunk shape for reasonable pruning, the buckle shed was heated up on January 12. The flower bud of plum tree began to sprout on January 30, began to bloom on February 13, and entered the full flowering stage on February 17. During this period, the bees should be released in the shed and artificial pollination should be carried out. The flowers will fall on February 27 and the fruit will mature on April 26. Second, after the greenhouse is covered with indoor temperature and humidity, different growth periods need different temperatures. In the flowering stage, covered with plastic film on the ground, the night temperature was not lower than O ℃, the day temperature was not more than 20 ℃, and the heat preservation was 18-20 days, the flower buds began to germinate. The most suitable temperature for fruit trees at flowering stage is 18-22 ℃, and it is generally maintained at 7-8 ℃ at night. But at this time, the external temperature is the lowest, so the night heat preservation is the key. The temperature is higher in the fruit expansion period, which can be maintained at about 25 ℃, and can be raised to 28 ℃ in the later stage. The suitable night temperature is 10-15 ℃. In the fruit coloring and ripening period, the temperature difference between day and night is generally large, which should be 25-28 ℃ in the daytime, not more than 30 ℃ in the daytime, and 13 ℃ at night. Pay attention to ventilation here, otherwise it is easy to cause high temperature injury. After covering, the temperature in the shed will rise obviously, and the relative humidity can reach about 80%. The humidity in the shed can be controlled by plastic film mulching. In the shed, except for watering during the fruit expansion period, there is generally no watering in other periods. If the humidity is too high, it can be combined with ventilation and dehumidification. Third, fertilizer, water and flower and fruit management should apply base fertilizer in autumn before withholding the shed, applying 3000-6000 kg organic fertilizer, 5 kg phosphate fertilizer and 50 kg potassium sulfate compound fertilizer per mu. After anthesis and young fruit expansion period, topdressing should be carried out twice, and the plant should apply 1-1.5 kg special fertilizer for fruit trees. From 1 week after anthesis, 0.3% urea + 0.3% potassium dihydrogen phosphate was sprayed every 2 weeks or so, and 3 Mel was sprayed 4 times in a row. The self-flowering seed-setting rate of plum trees is low, and there is a lack of pollination opportunities for open-field cultivation in greenhouse, so measures such as releasing bees in the greenhouse, spraying gibberellin at flowering stage and artificial pollination should be taken to improve the fruit setting rate. Fourth, the greenhouse for pest control is isolated from the outside world, and the diseases and insect pests are relatively light. However, it is easy to induce Botrytis cinerea because of the high humidity and relative stability in the shed. The prevention and control measures are as follows: timely ventilation and dehumidification, removal of diseased leaves and fruits, and at the same time, 35% metalaxyl 2000 000 times liquid or 50% carbendazim 1000 times solution, spraying once every 15-20 days, twice in a row, can effectively control Botrytis cinerea. Click to get more plum tree planting techniques click to get more fruit planting techniques