Causes and Control Methods of Tipburn in Napa Cabbage
Napa cabbage can be grown even in a water dispenser, and it is one of the vegetables that rural households and vegetable growers like to plant. It has a high survival rate and high yield, but during cultivation it is highly prone to a disease called tipburn, which seriously affects the yield and quality of napa cabbage. Many people do not know the causes and control methods of tipburn in napa cabbage, so below the editor will briefly introduce them.
1. Symptoms of tipburn in napa cabbage
Tipburn in napa cabbage is also called jiapilan. When the disease occurs, there is no abnormality in appearance, but the inner head leaves deteriorate and cannot be eaten. It mainly appears at the rosette stage, with symptoms including dry and withered edges of the heart leaves, curling inward, and inhibited growth. At the early head-forming stage, the leaf edges appear water-soaked, then turn yellow, semi-transparent to yellow-brown and scorched, and after head formation there is no abnormality.
2. Causes of tipburn in napa cabbage
There are many causes of tipburn in napa cabbage, mostly caused by soil problems and calcium deficiency. For example, low soil organic matter content and excessive application of chemical fertilizers lead to high soil concentration, which affects the root system's absorption of calcium. Or excessive application of nitrogen fertilizer under high temperature and dry conditions causes calcium deficiency, leading to rotting of the heart. Calcium deficiency, soil acidification, and fluctuating soil moisture also affect the root system's absorption of calcium. In addition, severe deficiency of active manganese in calcareous soils in the north also causes tipburn in napa cabbage.
3. Control methods
First, choose napa cabbage varieties with strong disease resistance. When planting, apply organic fertilizer heavily, raise soil temperature, and water appropriately. Especially when fertilizer and water are applied together, be sure to pay attention to the concentration, so as to avoid excessive concentration causing tipburn. During the growing period, increase the application of organic fertilizer, reasonably combine phosphorus, potassium, and trace-element fertilizers, and apply less single nitrogen fertilizer. During the head-forming stage, calcium-containing foliar fertilizer can be sprayed on the heart leaves, preferably once every 10 days or so, which can excellently supplement the plant's calcium and prevent tipburn.
The above is an introduction to the causes and control methods of tipburn in napa cabbage. We hope it can help you. To learn more related knowledge, please follow us.