Strawberry is relatively sensitive to water and fertilizer regulation, and can be used as irrigation water only after soft water treatment in areas with poor water quality. The irrigation frequency and irrigation EC value of different growth stages should be adjusted in time, the PH value should be basically kept 5.5-6.5 unchanged, and the weak acid environment can ensure the balanced absorption and absorption efficiency of each nutrient element.
In the early stage of planting, slow seedling is the main method, adequate irrigation is maintained, EC is controlled between 0.5 and 0.8ms/cm, and the liquid return is controlled at about 30%.
After slow seedling to the first spike of flowers, to balance vegetative growth and reproductive growth, irrigation EC control 0.8--1.0ms/cm, the amount of liquid return is controlled at 10%--15%.
After the first panicle flower set fruit, to stabilize plant growth, promote fruit expansion mainly, irrigation EC gradually increased to 1.2-1.5ms /cm, maintain about 20% of the liquid return.
In the stable fruit setting period, the main purpose is to ensure the yield and improve the quality, the irrigation EC is controlled at 1.2-1.5ms /cm, and the liquid return is adjusted to 10%-15%.
Pre-flowering fertilizer - to promote budding and flowering, mainly nitrogen fertilizer, the amount of fertilizer accounts for about 10% to 20% of the annual dosage.
Post-flowering fertilizer - to promote the growth of young fruits, mainly nitrogen fertilizer, the amount of fertilizer accounts for about 10% of the annual dosage.
Fruit expansion period - fruit-strengthening and shoot-stimulating fertilizers, nitrogen, phosphorus and potassium are used together to improve photosynthetic efficiency, increase nutrient accumulation, promote fruit enlargement and flower bud differentiation, and the amount of fertilizer accounts for 20% of the annual nitrogen, phosphate and potassium fertilizer dosage respectively.
Excellent fruit fertilizer---in the late growth period of the fruit (6 to 7 weeks before the maturity period),phosphate fertilizer and potassium fertilizer are mainly used to facilitate the accumulation of nutrient transport and promote quality improvement. The amount of fertilizer accounts for 20% of the annual phosphate fertilizer and potassium fertilizer consumption respectively.
Foliar fertilizer---low concentration, quick-acting fertilizer, small amount and multiple times, 7 to 8 times a year. In addition, trace elements such as manganese, boron, molybdenum, and zinc need to be supplemented after fruit thinning, which can increase the photosynthetic rate, enhance leaf respiration,increase nutrient accumulation, and promote fruit hypertrophy and flower bud differentiation.
