Big cherries promote economical cultivation and have developed rapidly in recent years. Attention should be paid to the following issues in the practice of shed cultivation.
First, the reason for the high economic efficiency of variety-promoting cultivation depends mainly on the early maturity and high quality of the variety. Similarly, investment in shed construction, the yield of early maturing varieties is 20% to 30% higher than that of medium-maturing varieties, and the quality of the varieties and the appearance and quality of the fruits have a great influence on the price of fruits. Therefore, the key to the cultivation of large cherries is the selection of good varieties. At present, there are mainly red and red cherries, Italian red early fruits, and early big fruits, which are suitable for shed planting.
Second, the temperature control buckle shed after the reasonable control of the temperature, is the key to the success of the shed. If cherry blossoms are shed in early spring, the flowering period is mostly in mid-March, and in case of cold current, cooling down to -1°C or below will freeze flowers, resulting in reduced yields or even outbreaks. Therefore, it is necessary to adopt measures for insulation and temperature increase. Sunny flowering, especially around noon, if the ventilation is not timely, there will be high temperature phenomenon, the greenhouse temperature can often reach more than 30 °C, resulting in reduced or lost pollen viability. The suitable temperature for germination and fertilization of big cherry pollen was 18°C. Too high or too low were not conducive to pollen germination and fertilization. The management standards for flowering temperature are as follows: ground temperature 14-15°C, daytime temperature 18-20°C, no more than 25°C, nighttime 5-7°C.
Third, the pollination of most varieties of cherry without self-fruiting ability, pollination, fertility is good or bad is the key to affecting the number of fruit. In large cherry sheds, the proportion of pollinated varieties is too low (the ratio of the main cultivars to the pollination cultivars is less than 5:1), and artificial pollination is not carried out during the flowering period, resulting in poor pollination and fertilization, resulting in different degrees of reduced yield. The solution is: When the big cherry is planted, the proportion of the main cultivars and pollination cultivars should be 1:1 to 3:1, and the pollination cultivars in the same shed should be no less than 2. In addition, artificial pollination or pollination with bees and wall bees should be carried out at flowering even when pollination trees are deployed.
Four, watering and rooting outside the fertilizer shed watering should grasp a small number of times, keep the principle of soil moisture, especially after the flower to the hard core after the thank you, the most sensitive to the water requirements, this period if the lack of water, it will cause young There was a lot of wilting and serious reductions in production. Extra-root fertilizer is an effective measure to timely recoinize trees in the greenhouse. From flowering to fruit development, the leaves can be sprayed once every 10 days for 2 or 3 times. However, the type and quality of the leaves should be considered for juice. Spray fertilizer should be carried out after 5pm to late afternoon. Spraying should be sprayed on the back of the blade to facilitate absorption.
Fifth, the appropriate fertilization Shed cherries should be applied before the shed to apply a sufficient amount of organic fertilizer, fertilization for the summer after the fertilization of fruit picking, the shed is generally not carried out or less ground fertilization.
Sixth, the withdrawal of sheds should be followed by the gradual withdrawal of sheds after fruit harvesting.
VII. Insect pest control: Immediately after spraying, apply 3 to 5 Baume degrees of lime sulfur, and spray 1 to 2 times 600 times 70% mancozeb or 700 times 50% carbendazim etc. 7-August, spray 2 times 3 times 200 times the equivalent of Bordeaux mixture, control of leaf, branch diseases and leaf pests.
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