2. Basic fertilizer: the basic fertilizer for pineapple growth and development in one year is the material condition to ensure high yield and high quality in the next year. Therefore, there is a saying that "one base wins three chases" and it is applied after the second harvest. When applying, first open a fertilization ditch at the footing or between rows, put dead leaves, fruit stalks, weeds or green manure at the bottom of the ditch, and then apply farmyard manure and chemical fertilizer mixed with two topsoil.
3 strong fruit fertilizer. Before flower bud differentiation, spray Wang Cuihua No.3 to promote flower bud differentiation, make flower buds bigger, increase the number of florets, enhance the cold resistance of plants, and lay a material foundation for increasing fruits. Spray Zhuangguodiling once before flowering, at the young fruit stage and at the fruit expansion stage, so as to thicken the fruit pedicle and improve the nutrient transport. Prevent falling flowers, falling fruit, cracking fruit, hard fruit and deformed fruit, and make the fruit beautiful in color, shape and taste.
4. Foliar spraying: Because the leaves of pineapple have special water storage structure and absorption function, foliar spraying is particularly effective, especially when the rhizosphere fertilization is inconvenient after the plant is closed, foliar spraying is an important way to supplement fertilizer. Nitrogen fertilizer is mainly used in vegetative growth period, potassium fertilizer is mainly used in reproductive growth period, followed by phosphate fertilizer. At the same time, spraying new high-fat film to improve the utilization rate of effective components in fertilizer can significantly improve the sugar content and flavor of fruit.