Enhancing the resilience of cotton varieties starts with careful management and growth promotion. First, to encourage stronger and more vigorous cotton growth, the use of plant growth regulators such as Ammonium or Chuan Zhuang Su can be applied. A recommended dosage is 2-3 grams per acre, or 12 ml of CS2 diluted in 50 kg of water for spraying. This helps control excessive vegetative growth and promotes better fruiting. Second, soil compaction in cotton fields should be addressed by timely cultivation and loosening the soil to improve aeration and water infiltration. Third, for cotton fields located on lower ground, it's important to maintain proper drainage by regularly clearing ditches and furrows, which encourages deeper root development. Fourth, for cotton grown under mulch film, the film should be removed promptly to allow roots to grow deeper into the soil and access more nutrients and moisture.
Increasing the efficiency of fertilization through potassium application is crucial for cotton fields that show signs of potassium deficiency. For such cases, applying 10-15 kg of potassium fertilizer per acre can meet the crop’s needs effectively. Additionally, adjusting the fertilizer ratio in the field helps improve the utilization of nitrogen and phosphate fertilizers, leading to more balanced and efficient nutrient uptake by the plants.
Applying foliar fertilizers can also enhance root health by improving oxygen availability in the root zone. For cotton affected by red leaf blight, if the leaves are still turgid and not wilted, foliar feeding can quickly restore plant vitality. One effective method is to spray 100 ml of humic acid active liquid fertilizer mixed with 45 kg of water per acre. Another approach is to use a 0.2% solution of potassium dihydrogen phosphate combined with a fungicide like Maoling to both nourish the plant and prevent or treat speck disease. These practices help support the plant’s recovery and ensure better yields in the long run.
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