Fertilizing methods for osmanthus
As one of the top ten famous flowers in traditional China, osmanthus is very popular for its rich aroma. Scientific fertilization is the key link to make osmanthus blossom every year. This paper systematically analyzes the key points of nutritional management of osmanthus osmanthus from fertilization timing, fertilizer ratio and operating skills. 1. Golden time for fertilization of osmanthus flowers 1.1 Growth cycle requirements March to October is the vegetative growth period of osmanthus flowers, and topdressing is needed every 15 days; fertilization should be stopped when entering the dormant period from November to February of the following year. The shoot germination period (March-April) and the flower bud differentiation period (July-August) are particularly critical. 1.2 Basic fertilizer is needed when transplanting at special time points, phosphorus and potassium fertilizers are added 30 days before flowering, and total element fertilizer is added after flowering to restore tree vitality. Avoid applying fertilizer during the high temperature period at noon. The best time is early morning or evening. 2. Scientific ratio of osmanthus fertilizer 2.1 Base fertilizer Select standard decomposed sheep manure (N-P-K=2-1-2) or soybean cake fertilizer (N-P-K=6-1-2) as base fertilizer, and the amount per plant is controlled at 500-800 grams, fully mixed with the soil and planted. 2.2 The nutritional plan for the growth period applies high-phosphorus fertilizer (N-P-K=20-5-5) during spring germination period, high-phosphorus potassium fertilizer (N-P-K=5-15-15) during flower bud differentiation period, and balanced fertilizer (N-P-K=15-15-15) after flowering period. 3. Correct application operation specifications 3.1 Liquid fertilizer application skills Organic liquid fertilizers need to be diluted 10-15 times, and chemical fertilizers need to be diluted 800- 1,000 times. The circular ditch application method is used, and a 10-cm deep trench is opened 30cm away from the main stem. After fertilization, the soil is covered and watered. 3.2 In the treatment of potted sweet-scented osmanthus under special conditions, the principle of "applying thin fertilizer and frequently" was adopted, and the concentration was reduced by 30%. Ferrous sulfate (0.2% solution) is added when yellow leaves appear, and humic acid fertilizer is added to improve the soil after falling leaves. 4. Fertilization taboos and misunderstandings 4.1 Absolute prohibitions strictly prohibit the use of undecomposed raw fertilizers (which can easily cause root rot), and avoid excessive single elements (excessive nitrogen leads to excessive growth, and excessive phosphorus leads to iron deficiency). 4.2 Common mistakes should be corrected to correct buds falling due to fertilization during flowering period, which requires immediate rinsing with clear water; when symptoms of fertilizer damage (scorched leaf margins) appear, rinse the roots and replace the surface soil.
Scientific fertilization is the guarantee for the healthy growth of osmanthus fragrans. By mastering the "three-period fertilization method"(base fertilizer period, growth period, and recovery period) and cooperating with the "four factor management"(time, ratio, method, and taboos), the osmanthus leaves can be made dark green and the fragrance of flowers lasts for a long time. It is recommended to establish a fertilization log to record the time, type and plant response of each fertilization, and gradually optimize personalized maintenance plans.