Fertilizer requirement characteristics, high-yield fertilization technology and time of pineapple in China

Pineapple fertilizer characteristics and high-yield fertilization technology, time: pineapple is a tropical perennial herb, high yield, nutrient requirements. According to research, to produce 2000 kg of fruit, it is necessary to absorb 7.5~14.0 kg of nitrogen, 2.1~3.1 kg of phosphorus, 14.7~41.6 kg of potassium, 6.1~14.6 kg of calcium and 0.5~1.6 kg of magnesium. The ratio of N, P and K uptake varied with growth stage, 1: 0.6: 1 in vegetative growth stage and 1: 1.4: 3.9 in flowering stage. It can be seen that pineapple needs higher nitrogen and potassium. Moreover, the proportion of phosphorus and potassium increases significantly with the advancement of the growth period, especially potassium, which is required in large quantities.

The nutrients needed by pineapple are mainly absorbed by roots. Pineapple root system is divided into aerial root and underground root. Aerial root is born in the leaf axil of aboveground stem and various buds, which can absorb nutrients and water. Shallow underground roots, but there are mycorrhizal, conducive to nutrient absorption, these characteristics should be considered in fertilization. Pineapple fertilizer is divided into base fertilizer and top fertilizer. Nitrogen is 15~40 kg, phosphorus is 6.4~10 kg and potassium is 19~30 kg per 667 square meters of newly planted pineapple. When planting, apply enough base fertilizer every 667 square meters. 1.5~2.0 tons of manure can be applied. The topdressing period of the first season is divided into:

① attack seedlings, strengthen plants and fertilize plants. Autumn seedling vegetative growth about 12~14 months, in addition to base fertilizer, but also need 2~3 topdressing;

② Flower bud differentiation fertilizer. Apply it one month before flower bud differentiation to increase floret number and fruit weight.

③ Strong buds and fat. Sowing at the end of the year before budding to the beginning of the spring of the following year to promote bud growth;

④ Fruit attack and germination fertilizer. After flowering, it can promote fruit expansion and bud sprouting.

(5) strong bud fertilizer. The buds selected after fruit picking are the fruit bearing plants of the next year, and fertilization is directly related to the yield of the next year. Therefore, this topdressing is very important, often half of the second season fertilizer application, the other half in its flower bud differentiation, fruit germination period application. Fertilization in the third season is the same as that in the second season. The fertilizer for seedling growth and bud growth was mainly nitrogen, combined with phosphorus and potassium fertilizer. Flower bud differentiation fertilizer, bud strengthening fertilizer and fruit germination fertilizer should be mainly potassium fertilizer, combined with nitrogen and phosphorus fertilizer. Only harvest single-season fruit, can be picked after the fruit, in the big row between the furrow or open holes, every 667 square meters of organic fertilizer 1~1.5 tons, combined with the application of calcium superphosphate 10 kg and potassium sulfate 15 kg, can also be used in the growing season with 1.0% urea and 0.4% potassium dihydrogen phosphate mixed solution for foliar spraying.