Pineapple fertilization formula characteristics and fertilization techniques
   　 Pineapple is a perennial evergreen plant. The growth of pineapple requires a lot of nitrogen, more potassium, balanced magnesium and a small amount of phosphorus and calcium. According to the study, in general, 2666 pineapple gardens per acre are planted . When the yield per acre is 3666 kg , the plants need to absorb 13.66 kg of nitrogen (N) , 3.86 kg of phosphorus (P2O5) and 26.6 kg of potassium (K20) from the soil . The ratio of the three is 1 : 0.28 : 1.92 . Wherein the amount of nutrients is entrained with fruit: nitrogen (N) 2.87 kg phosphorus (P205) 1.10 kg potassium (K20) 8.73 kg. The ratio of the three is 1 : 0.38 : 3.0 . It can be seen that the demand for potassium in pineapple is very high. Therefore, the fertilization formula of pineapple is characterized by heavy application of potassium fertilizer. The effect of potassium on pineapple quality is more important than yield.
　
　　 (1) The hillside of pineapple planted with base fertilizer , the soil is arid and poor, and the one-time application of base fertilizer at the time of planting is the basic measure for high yield and quality of pineapple. General base fertilizer can be combined with deep tillage. The people in the fruit area are accustomed to use cow manure, green manure as the base fertilizer, and appropriate quantitative fertilizer for ditch application or acupoint application.
　　 (2) Topdressing pineapple from colonization to heat generation, a growth cycle lasts 23 months. From the time of colonization to flower bud differentiation, it is the vegetative growth stage of pineapple seedling culture. At the seedling stage, there is generally no topdressing. If the seedling stage grows poorly, it can be traced to thin water and fertilizer. In the second year of spring, a small amount of nitrogen fertilizer can be properly applied to promote the growth of seedling leaves. In the long-term, we must focus on 3 times of topdressing.
For the first time, in November , the flower bud differentiation fertilizer was applied, and the phosphorus and potassium were mainly used, and the amount of nitrogen fertilizer was appropriately controlled.
The second flight from December to January Shi Lei reminders fat. Manure per plant 10--15 kilograms and 0.5 kilograms phosphate.
For the third time, the fruit was germinated and fertilized in April-May . In this period, medium-volume nitrogen and high-potassium potassium promote fruit growth and ensure fruit quality.
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