Symptoms of兰花 Deficiency in Fertilizer
Are the leaves of your orchid turning yellow and curling, or are the new buds growing slowly? These abnormal phenomena often point to issues of nutritional imbalance in the plant. As a typical succulent-rooted plant, orchids have special requirements for fertilizer, and mastering scientific fertilization techniques is key to maintaining their elegant form. This article will illustrate five typical symptoms to teach you how to accurately diagnose and scientifically supplement fertilizer.
One, Accurate Diagnosis of兰花 Deficiency Symptoms
1. Characteristics of Nitrogen Deficiency
New leaves are significantly thinner and smaller than old leaves, the leaf color appears unhealthy light green, and the leaf surface loses its waxy luster. Long-term nitrogen deficiency can lead to overall dwarfing of the plant and a reduction in flowering by more than 50%.
2. Symptoms of Phosphorus and Potassium Deficiency
The germination cycle of leaf buds extends by 2-3 weeks, and the edges of mature leaves show wavy curling. When potassium is deficient, the edges of old leaves first turn yellow, and the tip of the leaves can become brown and crispy, covering up to 1/3 of the leaf surface, with a significant decrease in leaf resistance.
3. Symptoms of Deficiency of Microelements
When magnesium is deficient, block-like yellow spots appear between the leaf veins, and calcium deficiency causes new leaves to present a spoon-shaped deformity. These hidden deficiencies are often misdiagnosed as diseases and require soil testing for accurate diagnosis.
Two, Systematic Solutions for兰花 Nutritional Deficiency
1. Quick-effect Fertilization Operation Guide
For nitrogen deficiency, it is recommended to use a 0.2% urea solution for foliar application, twice a week at dusk for 3 consecutive weeks. Phosphorus fertilizer supplementation should use a 1000-fold liquid of monopotassium phosphate, and combining it with back-spray on the leaves can increase absorption efficiency by 40%.
Symptoms of兰花 Deficiency in Fertilizer
2. Long-term Maintenance Management Points
Mixing 5% bone meal into the planting material can provide long-term calcium supplementation, and applying decomposed sheep manure once a month can continuously supply trace elements. It is recommended to use slow-release fertilizer granules in spring and autumn, following the principle of "shallow burial at the edge of the pot and applying a small amount multiple times."
3. Emergency Treatment for Special Conditions
When there is a severe magnesium deficiency, a mixture of 0.5% magnesium sulfate and 0.1% rice vinegar can be sprayed, as the acetic acid environment can enhance the activity of magnesium. For potassium supplementation in winter, it is recommended to use an extract of wood ash, which can both supplement potassium and adjust the pH of the planting material.
Orchid maintenance requires a systematic nutritional management plan, and it is recommended to conduct leaf nutrient testing every quarter. By observing indicators such as the growth rate of new leaves and the number of flower bud differentiation, fertilization strategies can be dynamically adjusted. Combined with regular replacement of planting material and maintaining environmental ventilation, orchids can remain lush and healthy throughout the year.