Causes and treatment methods for yellow leaves of white palm
As a popular indoor leaf-viewing plant, Baizhane's elegant white Buddha spaths and emerald green leaves complement each other. However, many flower lovers often encounter yellowing of their leaves during the maintenance process, which not only affects the ornamental value, but also serves as a distress signal from the plants. This article will deeply analyze the three common inducements and provide professional solutions to help you regain your vitality. A typical manifestation of strong light burns on yellow leaves caused by improper light management is the bottom layer of a tropical rainforest. The cuticle of its leaves is thin and its tolerance to ultraviolet light is only 2,000 - 3,000 Lux. When exposed to direct light for more than 3 hours, yellow-brown sunspots will appear on the leaves, and the yellowing areas are mostly concentrated on the leaf tips and leaf margins. Scientific light regulation solutions recommend using the "three-meter rule": place the plants 3 meters away from the south-facing window, or use a gauze curtain with a light transmittance of 40-50%. If artificial light source is used, the LED plant lamp needs to maintain an irradiation distance of 50cm and fill the light for 6-8 hours a day. Warning signal of root damage and waterlogging caused by water imbalance When the water content of the basin soil continues to be greater than 80%, the root system will undergo anaerobic respiration due to hypoxia and produce harmful substances such as ethanol. In the early stage, the lower leaves are yellowed, transparent water-stained spots appear at the base of the petiole, and in severe cases, the entire leaves droop. The precise watering repair technique uses the "knuckle detection method": the second joint of the index finger is inserted into the basin soil. If the soil at this depth is moist, there is no need to water. For plants with rotten roots, it is recommended to use an emergency substrate with perlite: vermiculite =3:1, combined with 800 times carbendazim solution to irrigate roots, which can improve the survival rate by more than 80%. Imbalance of nutrient supply induces yellowing and deficiency symptoms. Identification of old leaves yellowing evenly when nitrogen deficiency occurs, and iron deficiency causes green among veins of new leaves. During the growing season (April to September), it is necessary to ensure topdressing twice a month. It is recommended to use a balanced fertilizer of 20-20-20 for N-P-K ratio, and use a high phosphate fertilizer of 10-30-20 for root promotion in winter. Scientific fertilization schedule It is best to apply liquid fertilizer from 8 to 10 o'clock in the morning, combined with the "three-dilution method": first dilute the fertilizer to the instruction concentration, then dilute it twice, and finally rinse the leaves with clean water. In case of severe fertilizer shortage, 0.1% urea solution can be sprayed on the leaves for emergency response.
By systematically adjusting the three elements of light, moisture and nutrition, the problem of yellow leaves of white palm is usually improved in 2-3 weeks. It is recommended to use an EC value detector to monitor basin soil salinity every quarter and maintain the EC value within the range of 1.2-1.8mS/cm. Regularly wiping leaves with a damp cloth can not only improve photosynthetic efficiency, but also detect hidden dangers of pests and diseases in a timely manner.