We are a professional Chinese manufacturer of Purgative herb Extract; we supply various products of Relaxing Bowels Plant Extract, and can providing product images and basic parameters with each Relaxing Bowels Plant Extract, Plant Purgative Material and Plant Aperients. Look forward to your cooperation! Vegetable Fruit Enzyme Powder,Purgative Material,Senna Leaf Extract,Louts Leaf Extract,Semen Cassiae Extract Xi'an Quanao Biotech Co., Ltd. , https://www.quanaobio.com
Citrus fertilization should prevent chlorine damage
In recent years, the issue of chlorine accumulation in citrus production has drawn increasing attention from farmers. This problem often stems from the improper use of chlorinated fertilizers and pesticides. After fruit harvest, some farmers apply high-chloride compound fertilizers, which lead to a rise in chloride ion levels in the soil. As a result, citrus trees absorb excessive amounts of chlorine, leading to reduced water uptake and damage to root tips. The toxic effects of chloride ions on citrus can be classified into two categories: acute and chronic poisoning.
Acute poisoning occurs over a short period and is characterized by the dropping of older leaves and premature fruit fall. In severe cases, it can even lead to the loss of entire orchards. This type of poisoning typically affects citrus plants that are treated with potassium chloride combined with chlorine-containing pesticides. On the other hand, chronic poisoning develops gradually. Affected trees show brown necrotic areas along the midribs, with a wide base and narrow top. Young shoots may display irregular brown spots, with grayish leaves and dark green veins. During winter, leaf drop becomes more common. However, symptoms can improve once the use of chlorine-containing fertilizers and pesticides is stopped.
To reduce the harmful effects of chloride ions on citrus, several strategies can be implemented. First, it’s advisable to apply nitrogen-based fertilizers while minimizing or avoiding potassium fertilizers. For example, each orange tree can receive about 0.3 kilograms of urea plus 40 to 50 kilograms of well-rotted manure. When using compound fertilizers, choose those with high nitrogen content and low potassium chloride levels. Second, avoid applying potassium chloride directly to the rhizosphere or as a foliar spray. Instead, opt for potassium nitrate, potassium sulfate, or potassium dihydrogen phosphate when applying fertilizer around the roots. For foliar applications, mix urea, superphosphate, and potassium dihydrogen phosphate (or potassium nitrate) with water, let the mixture steep for 5 to 7 days, then strain and dilute before spraying.
After foliar application, the leaf color turns greener, the leaves become thicker, and the fruit set improves significantly. Moreover, after the autumn flush is exposed to frost, there is a noticeable reduction in leaf loss, and the following year's flower quality and quantity are greatly enhanced. These practices help effectively prevent chloride toxicity in citrus trees.