Characteristics of Strawberry Fertilization in Late Spring and Early Summer
First, need fertilizer characteristics Shallow strawberry roots, strong fertility requirements, large nutrient requirements, very sensitive to nutrients, excessive or insufficient fertilization all have negative effects on growth, yield and quality. Nitrogen fertilizer can promote the formation of a large number of leaves and stolons, strengthen vegetative growth, increase fruit, increase yield; nitrogen deficiency leaves will turn yellow, partially coke and slightly smaller than normal leaves. Phosphorus fertilizer can promote flower bud differentiation and increase fruit setting rate; the appearance of phosphorus-deficient upper leaves presents purple-red spots with small flowers and fruit. Potash fertilizer mainly promotes fruit ripening, increases sugar content of fruits, and improves fruit quality. The leaves of potassium deficiency often appear black, brown and dry, and become severely burned. Old leaves suffer severe damage, and the color of the fruit is light and the taste is poor. In addition, strawberries are very sensitive to chlorine and the use of chlorinated fertilizers should be controlled. Second, rational fertilization 1. Fertilizer application The rational fertilization of basal strawberry should ensure that the plant grows robustly during the whole growth period, and has more flowering, more fruit set, large fruit and high yield. Prior to planting, combined with deep ploughing and site-planting, basal fertilization is usually conducted with 2000-3,000 kg of organic fertilizer per acre and 50-60 kg of potassium sulfate compound fertilizer. 2, reasonable fertilizer to meet the flowering period of the demand for a variety of nutrients, generally after the start of the strawberry growth to flowering, per acre topdressing compound fertilizer 10 to 15 kg, base fertilizer can be sufficient dosage. Berry enlargement can be applied to high-nitrogen-potassium compound fertilizer about 15 kilograms; after a large number of fruits in strawberry, the plant nutrient deficiency is lacking. In order to restore plant growth as soon as possible, more new leaves and new roots should be formed. The specific fertilization amount should be determined according to the amount of fruit picking, more fruits and more fertilizer, less fruit and less fertilizer. 3, the root can be sprayed according to the growth situation of strawberry in the late period, using extra-root fertilizer (ie, foliar spray fertilizer) method of assisted fertilization. According to the need, spraying potassium dihydrogen phosphate or other foliar fertilizers for 3 to 4 times in the late growth stage can increase fruit setting rate, improve fruit quality, increase single fruit weight and prolong result period. In addition, the spraying of foliar fertilizers should be conducted in the evening or on a sunny day, because evaporation at noon is easy to cause strawberry damage. Electric Eyebrow Remover,Electric Eyebrow Trimmer,Automatic Eyebrow Trimmer,Best Electric Eyebrow Trimmer Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.meizons.com