High-yield fertilization technology for cotton

Cotton cultivation requires a precise and balanced approach to fertilization, tailored to the specific growth stages of the plant. The goal is to ensure that the cotton receives just enough nutrients—neither too little nor too much—to maintain a stable and healthy development. This careful balance helps the crop establish early, grow steadily through June, avoid excessive vegetative growth, and develop strong, well-formed bolls in both the middle and outer parts of the plant. By the time of the autumn harvest, the upper, middle, and lower fruiting positions should all be fully developed, leading to a high-yield structure. The recommended NPK ratio for cotton is 1:0.4:0.8. For every 200 kg of lint produced, approximately 37 kg of nitrogen, 14 kg of phosphorus, and 30 kg of potassium are required. To enhance soil fertility and improve water and nutrient absorption, it's essential to incorporate organic fertilizers into the farming system. This not only boosts fertilizer efficiency but also supports long-term sustainable production and higher yields. Here are the detailed fertilization techniques: 1. **Organic Bio-Fertilizer for Bauxite**: Applying the right type of fertilizer during the bauxite stage is crucial. In some cases, farmers have mistakenly used inorganic fertilizers, which can lead to poor root development and even plant death. The correct method involves deep application of biogas slurry combined with superphosphate before sealing the field. Before planting, mix 3,000 kg of compost with 6 kg of "Cunong" seedling fertilizer per acre. This should be done between April 15th and 25th, when the weather is sunny and the ground temperature is above 12°C. 2. **Use of Organic and Inorganic Nest Fertilizer**: Nest fertilizer has become a key component in cotton fields. Using the "Chu Nong" brand bio-organic nest fertilizer has proven effective in addressing root establishment, disease resistance, and seedling survival. It promotes quick rooting, rapid survival, and steady growth, ensuring early branching and strong development. Apply 20 pounds per mu, with 6 nests per acre. 3. **Bud Fertilizer with Compound Bio-Organic Fertilizer + Phosphorus-Potassium Micro-Fertilizer**: When buds appear, it's time to apply fertilizer. Use a combination of bio-organic fertilizer, phosphate, potash, and micro-nutrients. Apply about 60–240 kg of bio-organic fertilizer, 30 kg of phosphate, 30 kg of potash, and 3 kg of boron-zinc fertilizer per acre. Alternatively, use 80–120 kg of compound organic-inorganic fertilizer plus 3 kg of boron and zinc per acre. Apply using a ditch or small cultivating machine to combine fertilizing, loosening, weeding, and tilling in one step. 4. **Peach Fertilizer with Organic-Inorganic Compound Fertilizer + Compound Fertilizer**: Around July 10th, when the cotton plant has 1–2 bolls, apply 80 kg of organic-inorganic compound fertilizer and 15 kg of urea per acre. Repeat this every 15 days, applying 30–40 kg of compound fertilizer per acre. 5. **Top Fertilizer with Quick-Acting Nitrogen**: Around August 8th, when the cotton plant has 20–22 fruit branches, remove the top heart. In strong fields, apply 25 kg of urea per acre after pruning. In weak fields, apply 30 kg of urea three days before pruning. If the soil is dry, apply in the evening after 5 PM for best results. 6. **Zhuangqiu Peach Fertilizer Based on Field Conditions**: From August 25th to September 1st, when the plant starts forming back foot bolls and flower buds, apply 15 kg of urea per acre. This ensures strong autumn boll development, especially as climate changes allow for larger bolls even before September 20th. 7. **Foliar Fertilization Throughout the Growing Season**: From the bud stage until mid-September, apply foliar fertilizers regularly. In nitrogen-deficient areas, use amino acid or humic acid-based sprays. In potassium-deficient fields, use potassium-containing fertilizers. During the flower bud stage, spray 3–4 times with Tianfeng Brassin to boost nutrient levels and support healthy flower and fruit development. By following these practices, farmers can achieve consistent and high-quality cotton yields while maintaining soil health and environmental sustainability.

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