How to fertilize pineapple?

How to fertilize pineapple? Please give guidance on pineapple fertilization can refer to the following methods: 1. Base fertilizer: it is the material basis to ensure good plant growth after planting, requiring large amount of fertilizer, complete elements, high concentration and coordinated proportion. Barnyard manure, compost, soil manure, retting garbage manure, green manure and cake manure can be used, and appropriate amount of chemical phosphorus, potassium and magnesium fertilizer can be added. Red soil and latosol with low nitrogen, less calcium and low available phosphorus, 3.5-4 tons of barnyard manure, 150-200 kg of calcium superphosphate, 15-20 kg of potassium sulfate and 0.8-1 kg of magnesium sulfate were applied to the red soil and latosol, mixed well with two portions of topsoil and applied into the ditch before planting seedlings. 2. Base fertilizer: the basic fertilizer for the growth and development of pineapple in one year is the material condition to ensure high yield and high quality in the following year, so it is said that "one base wins three pursuits", which is applied after the second stubble fruit is harvested. When applying fertilizer, first open a fertilizer ditch on the footing or between rows, put withered leaves, fruit stalks, weeds or green manure at the bottom of the ditch, and then apply farm manure and chemical fertilizer mixed with two portions of topsoil. Generally, 2-2.5 tons of soil miscellaneous fertilizer, 20-25 kg of nitrogen, phosphorus and potassium ternary compound fertilizer and 25-30 kg of cake fertilizer are applied per mu. Cultivate the soil immediately after application. 3. Topdressing: 1) strong bud fertilizer. After harvesting and making fruit, apply it to the soil of the stem foot or the base of the petiole with Dole mixed with water to promote the growth of sucking buds. 2) pre-flowering fertilizer. Before flower bud differentiation, 2-2.5 kg barnyard manure, 20-30 g urea and 40-50 g superphosphate were applied to each plant to promote flower bud differentiation, increase the number of floret layers and enhance plant cold resistance. 3) promoting buds and fertilizing. In January, it was applied in the trench on the stem base, mainly phosphorus and potassium fertilizer, mixed with half of farm manure, 0.8-1 kg per plant, in order to promote the hypertrophy of flower buds and lay the material foundation for increasing fruit: 4) strong fruit to accelerate budding. In the period from April to May after flowering and small fruit expansion period, potassium and phosphorus fertilizers were mainly applied, combined with a small amount of nitrogen fertilizer, the amount of fertilizer accounted for 5% of the total amount of fertilizer applied in the whole year, trenching dry application in the stem and foot or doule application. 4. foliar fertilizer spraying: because the leaves of pineapple have special water storage structure and absorption function, the effect of foliar fertilizer spraying is especially good, especially when it is inconvenient to apply fertilizer in the rhizosphere after the plant is closed. Nitrogen fertilizer is the main fertilizer in the vegetative growth period, potassium is the main fertilizer in the reproductive period, phosphorus is the second, and the famous Dafeibao, Duole and calcium fertilizer can be sprayed on the leaves. Spraying Dole on each leaf 1-2 times a month in May, June and July could significantly improve the sugar content and flavor of the fruit. Click to get more pineapple planting techniques click to get more fruit planting techniques