Strawberries are hi-fertilizer plants, and the demand for fertilizer varies with the growth period, but it should be mainly based on one-off basal fertilizer. During the growing season, fast-acting chemical fertilizers can be used to ensure the normal growth and development of the plants and to obtain higher yields. The absorption of nitrogen and potassium in strawberry is slightly more than that in phosphate fertilizer, but phosphate fertilizer is easily fixed by the soil and is difficult to absorb. Therefore, the percentage of fertilizer should be higher than that of nitrogen and potassium. Basal fertilizer is dominated by high-quality organic fertilizers and a small amount of fast-acting chemical fertilizers are applied. However, strawberries are chlorine-free crops. Chemical fertilizers containing chlorine cannot be used when fertilizing chemical fertilizers.
The facility's fruiting period lasts up to six months. In order to make the greenhouse strawberry obtain the best nutritional quality during the harvest period, it will not be insane or premature, and it will continue to produce high quality and high yields. The principle of adding nitrogen, phosphorus, and potassium should be mastered in fertilization.
First, base fertilizer
In order to cultivate fertility and ripen the soil, the strawberry should be plowed 25-35 cm deep before planting, combined with ploughing Mushi organic fertilizer 450-500 kg or high quality farmyard fertilizer 3500-4000 kg, urea 5-6 kg, phosphoric acid II Ammonium 15-20 kg, potassium sulfate 5-6 kg.
Second, top dressing
In order to meet the needs of flowering for a variety of nutrition, generally after the start of the growth of strawberries to the flowering period, Mushi 9-10 kg of urea, potassium sulfate 4-6 kg; berry expansion fertilizer: the general application of urea 11-13 kg, Potassium sulfate 7-8 kg. After a large number of fruits in strawberry, the nutrient in the plant is lacking. In order to restore plant growth as soon as possible, more new leaves and new roots are formed, and top dressing may be performed as needed.
Third, outside the top dressing
According to the growing situation of strawberries, the method of applying extra-root fertilizer (foliar spraying fertilizer) can be used for assisted fertilization. Before and after flowering, foliar application of 0.3% potassium dihydrogen phosphate 3-4 times or 0.3% borax can increase fruit setting rate, improve fruit quality and increase fruit weight. At the beginning of flowering and flowering, spraying 0.2% calcium sulfate plus 0.05% manganese sulfate can increase the yield and fruit storage performance. In addition, the spraying of foliar fertilizer should be selected in the cloudy evening or sunny evening, because the evaporation at noon is easy to cause strawberry fertilizer.
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