Perfume lily yellow leaf causes and treatment methods
As a favorite ornamental flower, perfume lily often appears yellowing in the process of conservation. This paper systematically analyzes the three causes of yellow leaves, combined with the real diagnosis atlas, to provide scientific solutions and daily maintenance suggestions for flower friends. 1. Water management imbalance leads to yellow leaves 1.1 Waterlogging formation mechanism Although perfume lily likes wet environment, its bulb is extremely sensitive to accumulated water. When the soil moisture content is greater than 65%, root respiration is blocked, resulting in browning. At the beginning, the bottom leaves are yellowed, and in severe cases, the entire plant wilts. 1.2 The emergency response plan immediately stopped the water and took three steps to rescue: ① Tilt the flowerpot to drain the stagnant water ② loosen the soil and place it in a ventilated and scattered light place ③ Use bamboo sticks to make vent holes in the wall of the pot to accelerate evaporation. Wait until the soil moisture returns to about 40%, before maintaining it normally. 2. Nutritional imbalance causes yellowing 2.1 Identification of characteristics of fertilizer damage When excessive fertilization, the leaves show focal edge spots, and the new leaves are deformed and curled. Soil environments with EC values>2.0ms/cm will cause osmotic pressure imbalance and cause "root burning" phenomenon. 2.2 Scientific remedial measures: For mild cases, the dipping basin method is used to wash it 3-5 times. For severe cases, the basin needs to be changed: ① Cut off the black rot roots; ② Use vermiculite + peat (1:3) to mix new soil; ③ Spray 0.1% brassinolide at the seedling stage to promote rooting. 3. Abnormal physical and chemical properties of soil 3.1 Diagnosis of acid-base imbalance When the pH value is>7.5, iron in the soil is fixed, showing chlorosis and yellowing between new veins. It can be tested with pH paper, and the ideal range should be maintained between 5.5 and 6.8. 3.2 The soil improvement plan applies acidic nutrient solution every month: citric acid (2 g/L) is mixed with EDTA-Fe (1 g/L), and pine needles are used to cover topsoil. When severely alkalized, use sulfur powder (5 g/liter soil) for substrate improvement.
Through scientific diagnosis and precise intervention, combined with regular testing of soil EC value and pH value, and establishing a watering system that allows both dry and wet, the problem of yellow leaves of perfume lily can be effectively prevented and the plant can maintain an oily green and strong growth state.