Why is the Anthurium flower bud black?
Anthurium is a highly ornamental tropical plant, and its bright red buds often turn black due to improper maintenance. This article will systematically analyze the causes of Anthurium's blackening and corresponding solution strategies from the three dimensions of physiological metabolism, water management, and nutritional regulation. 1. Metabolism affects the status of flower buds 1. Characteristics of natural metabolic cycle The flowering period of a single Anthurium andraeanum can last for 2-3 months. When it enters the end of the flowering period, melanin precipitation will naturally occur at the base of the bud. This phenomenon is like the color change of autumn leaves, which is a normal physiological process for plants to recycle energy. 2. Key points for metabolic maintenance during this stage, it is necessary to keep the ambient temperature stable at 18-25℃ to avoid sudden changes in cold and heat to accelerate the aging of flower buds. It is recommended to supplement water-soluble fertilizers containing phosphorus and potassium every 10 days to extend the viewing period of flower buds. 2. Key control points for water management 1. The substrate humidity is accurately controlled. When the water content of peatsoil exceeds 60%, the root system will produce harmful substances such as acetic acid due to hypoxia, which is manifested by yellowing of new leaves and blackening of flower buds. It can be detected by the bamboo stick insertion method: water is suspended when the bamboo stick is brought out of the wet soil. 2. The intelligent water replenishment plan adopts version 2.0 of "See Dry, See Wet": After the surface layer is dried for 2 cm, use warm water at 25℃ to slowly pour it through along the edge of the basin. In summer, cooperate with the tray water accumulation method to maintain the air humidity above 65%. 3. Nutritional imbalance repair plan 1. Emergency treatment of fertilizer hazards When leaf tips appear to be scorched and withered accompanied by black spots on flower buds, immediately use the dipping basin method to wash the substrate. Pour the basin soil with clear water for three consecutive times to dilute the EC value to below 1.2ms/cm. 2. Scientific fertilization cycle Apply fertilizer every 15 days at the ratio of "3:1:2"(nitrogen, phosphorus and potassium) during the growth period, and use the formula of "1:3:2" during the bud period. It is recommended to use chelated trace fertilizers to avoid salt accumulation. 4. Comprehensive control of environmental factors and control the light intensity to 10,000 - 15,000 lux, and use sunshade nets to adjust direct light. Keep the temperature difference between day and night ≤5℃, and regularly wipe the pores of the leaves with a damp cloth to ensure photosynthetic efficiency.
By establishing a dynamic maintenance log and recording data such as temperature, humidity, fertilizer amount, etc., the flower bud status can be predicted 15 days in advance. Combined with phased pruning, Anthurium can maintain a bud replacement cycle of 5-7 times a year.