The greenhouse nectarine shed is the key period for its management. The following points should be grasped in management:
Decreasing warming time greenhouse nectarine covered the plastic film in mid-November and covered the straw curtain. Cover during the day, pull up at night, and open the air outlet, artificial cooling, so that the temperature dropped to 7.2 degrees below early, prompting to enter early dormancy. After 40 days, it can meet the demand for 800 hours of cold. By December 10th, it will begin to heat up.
Temperature and humidity control
The temperature is turned on at about 8:00 AM during the day and the temperature rises. The straw curtain is kept warm at around 4 pm. From the beginning of warming to budding, the maximum temperature during the day is controlled at 14°C～16°C, and at night at -2°C; during the bud to flowering stage, the temperature is controlled at 18°C～22°C, the minimum temperature is not lower than 5°C; the highest flowering temperature Can not be higher than 25 °C, the minimum temperature can not be lower than 7 °C; fruit development period is controlled at 25 °C, the maximum does not exceed 28 °C, the minimum temperature is not less than 10 °C, generally during the day when more than 25 °C, timely opening vent outlet Ventilation cooling .
Humidity from the buckle shed to the budding period, air humidity maintained at 70% to 80%, flowering period to maintain 50%, after flowering to harvest period, maintain about 60%.
Plastic pruning The nectarine cultivation of trees suitable for the spindle-shaped, generally 30 cm high trunk height, tree height control between 1.5 to 1.8 meters, each plant retains 6 to 8 main branches, the lower main branch open angle 90, length 80 ~ 90 cm, the main branch of the upper open angle of 60 to 70, length 40 to 50 cm, forming a small tree on the next large, in order to facilitate ventilation. During winter cutting, branches and partial dense branches less than 30 cm from the ground shall be removed; long and short branches with a length of 50 cm or more shall be cut short and light, and the remaining branches shall be thrown away.
After the soil, fertilizer, and water management sheds were immediately watered and 1000 kg of decomposed chicken manure was applied, 50 kg of NPK fertilizer was applied. After the hard core, 0.3% potassium dihydrogen phosphate solution was sprayed twice, and the fruit was watered once when the thumb was in size, and no longer watered. The fruit should not be watered during the near mature period to prevent cracking.
Flower and fruit management artificial pollination, artificial pollination in the flowering period 2 times, in the different varieties of flowers on the point grant. In order to improve the fruit quality and promote the development of the fruit, the tree with high fruit setting rate should be thinned, generally 2 weeks after flowering, fruit peeling, 2~3 long fruit sticks, 1 to 2 middle fruit sticks, short fruit sticks. 1 is appropriate, the extension of the branches without leaving fruit. Pay attention to the location and development status of selected fruits, without leaving small fruit, malformed fruit, fruit, fruit and pests. In addition, after removing the flowers, the unrecovered remains are promptly removed to avoid contaminating the fruit surface and causing fruit diseases.
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