After the nectarine is shed, the management will catch four points.
The cultivation of nectarine in the greenhouse is generally carried out in the middle of December to the middle of January of the next year. The management of the shed after the shed should focus on the following measures.
First, the temperature and humidity control is closed. 1, temperature. Generally, the temperature before the shed is controlled to 0-28 °C; the germination period is 5-28 °C; the flowering period is maintained at 10-15 °C during the day (not more than 20 °C), and the nighttime is not lower than 7 °C; The nuclear period is 5-25 ° C; the fruit expansion period is 10-25 ° C; the fruit coloring period is 15-28 ° C; the harvesting period is 17-30 ° C. 2, humidity. The relative humidity of the air from the shed to the germination period is maintained at about 80%; the flowering period is controlled at 50-60%; the humidity during flowering to maturity is maintained at 60-70%.
Second, timely watering and fertilization. After the shed, the water should be poured once in time to ensure proper temperature and humidity for germination. In combination with watering, per hole of each seedling is drilled and applied with 0.5-1 kg of ternary compound fertilizer. Later, water is poured once in the fruit setting, hard core period and fruit expansion period, and watering and top dressing are combined twice in the hard core period and the fruit expansion period. After the nectarine leaves are unfolded, spray 0.2% of Hexin liquid fertilizer plus 0.1% rare earth plus 0.2% of the agricultural protection No. 1 or No. 3 liquid fertilizer every 10-15 days.
Third, pay attention to the flower and fruit. During the flowering period, artificial pollination or bee pollination is used to increase the fruit setting rate. After 3-4 weeks of flowering, the fruit will be thinned out in time, and the result will be too much, too dense and deformed, and the fruit will be removed as soon as possible. Generally, long fruit branches (30-60 cm) are reserved for 3-5 fruits, middle fruit branches (15-35 cm) for 2-3, and short fruit branches (5-15 cm) for 1-2.
Fourth, we must guard against pests and diseases. The pests and diseases of nectarine in the greenhouse are mainly anthracnose, black spot, aphids and mites. Control method: After the shed, spray the whole plant 1-2 times with 5 waves of stone sulphur mixture; spray 80% of the big m-45 or 70% thiophanate 600-800 times every 10-15 days after the falling flower The liquid is sprayed 3-5 times; when aphids and mites occur, 10% imidacloprid 2000-2500 times solution and 15% darlonone 1500 times solution can be used respectively.
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