Causes of Yellowing Leaves in Chinese Chives and Detailed Prevention and Control Measures
Chinese chives can be eaten in many ways and are rich in nutrients, making them highly favored by consumers, and they are grown over a very wide area. However, many vegetable growers report that Chinese chives develop yellowing leaves during cultivation, and in severe cases the entire field of Chinese chives turns yellow, bringing great economic losses to the growers. So what causes yellowing leaves in Chinese chives? How can it be solved? Let's take a look together with Qinnong Web.
I. Causes of Yellowing Leaves
1. Lack of trace elements: Generally, during the cultivation of Chinese chives, a lack of trace elements such as iron, copper and zinc can cause yellowing leaves.
2. Over-application of nitrogen fertilizer: Some vegetable growers, in order to make Chinese chives grow quickly and shorten the growth cycle, apply too much nitrogen fertilizer while ignoring other nutrients, causing an imbalance in the ratio of nitrogen, phosphorus and potassium fertilizers, which inhibits the roots' absorption and utilization of other elements and thus causes yellow leaves.
3. Excessive application of acidic fertilizers: Applying excessive amounts of acidic fertilizers during fertilization acidifies the growing soil, hindering the growth and development of the root system. The absorption of nutrients and water becomes poor, causing Chinese chives to suffer from malnutrition and resulting in yellow leaves.
4. No application of organic fertilizer: Some vegetable growers apply only chemical fertilizers and no organic or farmyard manure, causing trace elements in the soil to decline continuously. This leads to soil compaction and clodding, poor permeability, and affects root respiration and absorption, causing yellow leaves and, in severe cases, large-scale dieback.
5. Improper watering: Excessive and blind watering makes the field humidity high or the soil waterlogged, and soil permeability poor. The roots likewise cannot respire normally, resulting in malnutrition and yellow leaves.
6. Pests and diseases: Many pests and diseases can cause yellowing leaves in Chinese chives, and in severe cases they die back entirely.
II. Prevention and Control Measures
1. Rational fertilization: When fertilizing, in addition to a reasonable combination of nitrogen, phosphorus and potassium fertilizers, appropriately increase the application of some organic fertilizer to ensure the content of trace elements in the soil, so that Chinese chives can absorb and utilize them and receive a balanced supply of nutrients. In addition, fertilization should follow the various growth stages of Chinese chives. In September to October, apply about 100-450 jin of organic fertilizer per mu, and spray foliar fertilizer several times, which can fully supply the trace elements needed by Chinese chives. Also, avoid applying large amounts of acidic fertilizer. If yellow leaves are caused by soil acidification, lime powder and plant ash can be spread into the soil to adjust the pH and restore the soil to normal.
2. Rational watering: Watering should be based on soil moisture and weather. In dry climates and when the soil is dry, water promptly to keep the soil moist; when the soil has sufficient moisture, there is no need to water. Also, in rainy seasons, drain promptly to prevent waterlogging. In addition, watering should take the soil texture into account. Generally, sandy soil needs a shorter interval, while clayey soil needs a suitably longer interval. When watering, loosen the soil appropriately to increase permeability.
3. Pest and disease control: Pest and disease control should focus on prevention. Generally, during planting, the soil and seeds should be disinfected, and fertilizer and water management should be strengthened during cultivation to improve the disease resistance of Chinese chives. When pests and diseases are found, deal with them promptly and apply the right treatment.
The above are the causes of yellowing leaves in Chinese chives and the prevention and control measures brought to you by Qinnong Web. We hope they can help you. To learn more about Chinese chive cultivation, please stay tuned to Qinnong Web.