The autumn climate has gradually turned cooler and the trees have entered the second growing season of the year. Strengthening fertilization management at this stage has a greater effect on its growth, flowering, and safe wintering. Top dressing should be dealt with according to the principle of "thin and thin, diligent, long-term, fixed consumption". Human fecal urine is diluted 20- to 30-fold, and bean cake water, urine water and fish gut water are diluted 10 to 20 times. Fertilizer is applied every 15 days to 20 days. Flowers that bloom before and after the fall should be applied before, after, and before flowering, and do not need to be top-dressed during flowering to avoid falling flowers. Fertilizer topdressing mainly includes urea, superphosphate, potassium dihydrogen phosphate, ammonium bicarbonate and other fertilizers and mature manure, cake fertilizer, rapeseed cake and other farmyard fertilizers. Fertilizer is mainly chemical fertilizer, supplemented by farmyard fertilizer. Unfamiliar human excrement and cake fertilizer can not be used as fertilizers for flowers and trees. Otherwise, flowers and trees are not only difficult to absorb, but also cause burning of roots. Which kind of fertilizer to use in fertilizer application should be treated differently according to the different habits of flowers. Hi acidic azaleas, camellia, gardenia and other flowers and botanicals avoid alkaline fertilizers, should apply potassium nitrate, superphosphate, ammonium sulfate and other acidic fertilizers. In the vegetative growth period, more nitrogen and potassium fertilizers should be applied, and more phosphorus fertilizer should be applied during the flower bud formation period. To chrysanthemum, a string of red, camellia, sweet-scented osmanthus and rhododendron that bloom once a year, it is necessary to chase the fertilizer twice or three times mainly with phosphate fertilizer, otherwise there will be less and less flowers, and there will be buds. phenomenon. For flowers that are blooming multiple times a year, such as rose, jasmine, four-season begonia, Milan, etc., they should be fully supplied with complete fertilizer to make their flowers beautiful and unbeaten. On the foliage of the Podocarpus, bamboo, Cycad and other flowers can be topdressing nitrogen fertilizer, to promote the green leaves. For flowers based on observational fruit, fertilizer and water should be properly controlled during the flowering period, and sufficient fertilizer should be applied during the fruit period to achieve the desired effect. For the bulbous flowers, the proportion of potassium fertilizer, nitrogen, phosphorus, and potassium should be applied in a ratio of 1:1:2, which is beneficial to the enrichment of bulbous roots. For fragrant flowers, after entering the flowering stage, more phosphorus and potassium fertilizers should be applied to promote the fragrance of flowers. In addition to the top dressing, fertilization is also used to supplement the fertility. It has the advantages of less dosage, fast absorption and significant fertilizer effect. Fertilizer is suitable for the morning and evening. It is necessary to spray the leaves on both sides. Fertilizers for foliar fertilization must be water-soluble fertilizers with a low concentration. The application concentration of each fertilizer is: urea 0.2% - 0.3%, calcium superphosphate 1% - 3%, potassium dihydrogen phosphate 0.1% - 0.3%, ammonium sulfate 0.2%-0.3%, boric acid 0.1%-0.2%, ferrous sulfate 0.2%-0.5%. After spraying 1% superphosphate solution on flowers such as chrysanthemum, camellia, sweet-scented osmanthus, and a string of red flowers, the flowers are bright and lush and open in advance. For 0.3% urea liquid fertilizers such as cycads and other foliage plants, the color of green leaves can grow green and grow vigorously. China Agricultural Network Editor
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