The production base of Luzao jujube in Kongdian Village, Huangdian City, has tested the early promotion of cultivation of winter jujube plastic greenhouses. The results show that the mature period can be advanced by 30 days. The cultivation techniques are now described as follows: The plastic shed for the construction of plastic greenhouses is a wood-and-wood ditch. The skeleton consists of columns, tie rods, arches, and pressure bars. The column is made of round wood material with a length of 1.8 to 3.8 meters and a diameter of 5 to 8 centimeters. 6 to 7 rows of columns per row, one for every 2 meters; one for every 3 meters in the longitudinal direction. A small hole is drilled 8 to 10 centimeters from the stigma and the arch is placed on the stigma. The thin wire is fastened through the hole to form a curved arch. The base of the column is buried about 50 centimeters underground. The base is made of bricks, stones, etc., and it is also used as a columnar pillar on the ground to connect the outer columns of the greenhouse to prevent the greenhouse from sinking or being pulled up. The rods and arches are made of bamboo material about 5 meters long and 5 to 6 centimeters wide. The rods are longitudinally connected to the columns with high axial height and low sides so that the skeletons of the greenhouses can be integrated. Both ends of the arch rod are inserted into the ground and horizontally connected with columns and tie rods to form a naturally arched shed with a distance of 1 meter. Compression rods are made of 8th iron wire. After being covered with film, they are laterally pressed at a certain distance and pressed on the outside. Both ends are fixed on the ground to prevent the film from being blown by the wind. The plastic film covers 2 to 3 cm thick straw curtains. The management of the shed during the shed period will be shed on January 20 every year. The daytime temperature will rise above 7°C after more than 10 days, and the temperature will be above 0°C for most of the night. In early March, the average temperature is stable above 13°C, which is 39 days earlier than when exposed to this temperature. When the greenhouse temperature exceeds 26°C during the flowering period, open the skylight to cool the air, and control the air humidity to 50% to 60%. Spray 5 Baume degrees lime sulfur before budding. The budding period has a temperature of 15°C to 25°C during the day, 8°C at night, and a relative humidity of about 60%. During budding period, the temperature during the day is 15°C～28°C, nighttime is around I0°C, relative humidity is 60%. The initial flowering daytime temperature is 15°C～30°C, nighttime is 15°C, and relative humidity is 50%-60%. Flowering temperature during the day 30 °C, night l0 °C ~ 15 °C, relative humidity 60% ~ 70%. After the flower falls, the temperature in the shed during the daytime is controlled below 28°C, and the nighttime temperature is controlled above 3°C. The relative humidity of the air is controlled below 60%. Be careful to choose a material with high light transmittance. In the cultivation and management, the pruning should be reasonable, the transparency of the canopy should be improved, and the reflective film should be laid to increase the utilization of light. An incandescent lamp is placed in the shade ceiling to supplement the light. Fertilization is mainly based on farmyard manure, which can increase soil nutrients and increase carbon dioxide content in the shed. Timely cultivating loose soil, increasing soil porosity to increase soil oxygen content. 0.3 kg of Sanyuan compound fertilizer was applied before flowering, and a small amount of water was applied after fertilization. Flowering artificially assisted pollination to increase seed setting rate. After jujube fruit set, the fruit was thinned before the physiological fruit drop. The pests and fruits and poorly growing fruits were removed firstly. The fruit was set before the physiological fruit drop, and the amount of fruit left was larger than that of the exposed land. Each hanging crane had 2 good fruits in the upper middle. When the average daily temperature in the shed has exceeded 20°C in mid-May, the shed film can be removed or rolled around. After the release of the greenhouse film, the management of Lubei Dongzao was completed. After the mulching of the greenhouse film was covered, the young fruit period was covered. At this time, the fruit should be pruned in summer. The air and light transmission conditions in the canopy should be improved by removing the dense branches and leggy shoots, and the toppings and branching should be used. , Take softening and other methods to balance the tree potential, control vegetative growth, and promote reproductive growth. Jujube fruit growth period should pay attention to topdressing potassium fertilizer, interval 5-7 days, continuous spraying 3 to 4 times 0.3% potassium dihydrogen phosphate. Timely replenishment of moisture, so that the soil moisture is often maintained at 50% to 60% of the field capacity, and continue to use the summer scissors to control the growth of Wang branch. In early November, the winter jujube tree is dormant after applying dormant basal fertilizers. Generally, 2000-3000 kilograms of high quality manure fertilizer or 1,000 kilograms of marsh fertilizer and 1000 kilograms of high-quality manure fertilizer are used to apply water. After jujube deciduous, it is cut into winter before shearing shed. Long-term, short-cut and retraction are adopted. The methods such as thinning and falling head control the height of the tree and open the light path.
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Winter jujube greenhouse cultivation matures in January
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