Techniques of promoting flowering of strawberries in greenhouse
The purpose of strawberry cultivation is to produce early and appear on the market early, and the key measure is to promote flower bud differentiation and flowering. The measures to promote flower bud differentiation were carried out at the seedling stage, and flowering should be promoted after transplanting. The methods of promoting flowering are as follows: 1. Temperature and humidity management in the greenhouse. The temperature in the shed is 30 degrees during the day and more than 10 degrees at night. Raise the ground temperature as much as possible and promote the activity of root system. Air humidity 50% Murray 60%, low humidity is not only conducive to flowering and pollination, but also conducive to the prevention of diseases. Covering with black plastic film can not only reduce the humidity in the shed, but also increase the ground temperature. 2. Replenish the light. About 20 watts of energy-saving lamps are hung 1 meter above the plant, one lamp every 4 meters. Turn on the lights after sunset and turn them off at 10:00 in the evening. Or, lighting for 10 minutes per hour until sunrise, intermittent lighting has the same effect as continuous lighting, which can save electricity. 3. Hormone supplementation. If the plant becomes dwarf dormancy due to low temperature, the dormancy is broken with gibberellin, 10ppm gibberellin is sprayed once before budding, and again after a week. If the plant is not dormant and the growth is still normal, gibberellin is not sprayed to avoid excessive vegetative growth and counterproductive. 4. Arrange the plants. The finishing plant can concentrate nutrients to promote flowering, leaving only one terminal bud before the apical inflorescence is drawn, and then two axillary buds are selected to remove the extra axillary buds at any time. Plants with three buds generally have 3 to 5 inflorescences, retaining about 15 leaves and removing redundant old leaf disease leaves at any time.
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Scientific control of strawberry diseases and insect pests
Under the condition that the growth management of strawberries planted in greenhouse is normal, the special-shaped fruit is 10% Murray 20%. When the selection of seeds is improper or the ecological environment does not meet the growth needs of strawberries, the proportion of heteromorphic fruits often increases, some as high as about 50%, resulting in reduced yield and low efficiency. Common heteromorphic fruits are crooked flat fruit, fat fruit, aggregate fruit, protruding fruit.
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Virus-free cultivation techniques of Strawberry
After years of asexual reproduction, strawberry virus disease is becoming more and more serious, the species character of strawberry varieties began to degenerate, and the yield and quality also decreased year by year. Virus-carrying plants are generally characterized by individual dwarfing, smaller leaves, serrated and acute periphery of leaflets, yellowing of heart leaves, early flowering, small fruit, reduced yield.
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