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Fertilizing Cotton During the Flowering and Boll Stage Requires Care: Master the Correct Method

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Name: Fertilizing Cotton During the Flowering and Boll Stage Requires Care Category: Crop Production Technology / Principles of Plant Physiology and Cultivation Techniques Scope of Application: Unrestricted Detailed Content: The flowering and boll stage is the critical period when cotton gradually shifts from vegetative growth to reproductive growth, and it is also the period when cotton has the highest fertilizer demand. For cotton in full bloom, since vegetative growth is still proceeding alongside reproductive growth, applying excessive nitrogen fertilizer at this time will cause vigorous growth and then excessive vegetative growth, which not only intensifies the shedding of squares and bolls but also triggers premature senescence. Therefore, for cotton in full bloom, the application should

Name: Fertilizing Cotton During the Flowering and Boll Stage Requires Care

Category: Crop Production Technology / Principles of Plant Physiology and Cultivation Techniques

Scope of Application: Unrestricted

Detailed Content:

The flowering and boll stage is the critical period when cotton gradually shifts from vegetative growth to reproductive growth, and it is also the period when cotton has the highest fertilizer demand.

For cotton in full bloom, since vegetative growth is still proceeding alongside reproductive growth, applying excessive nitrogen fertilizer at this time will cause vigorous growth and then excessive vegetative growth, which not only intensifies the shedding of squares and bolls but also triggers premature senescence. Therefore, for cotton in full bloom, the application should focus on compound fertilizer, applying 15-20 kg of high-content compound fertilizer per mu, or applying a small amount of urea together with phosphorus and potassium fertilizers. Especially in cotton fields planted with hybrid insect-resistant cotton, potassium fertilizer should be increased further, with no less than 15 kg of potassium fertilizer per mu. Fertilizer at the flowering stage should be applied deeply, and soil should be hilled up to form ridges.

For cotton that has already set bolls, boll fertilizer should be applied. In areas with a large planting area of hybrid insect-resistant cotton, boll fertilizer should be applied twice. When a single cotton plant has an average of 2-3 mature bolls, about 15 kg of urea should be applied per mu. When a single cotton plant has an average of about 10 mature bolls, about 15 kg of urea should be applied again. When cotton has set many bolls, there is no need to worry about excessive vegetative growth when applying urea, because after cotton sets bolls, the direction of nutrient transport has shifted from branches and leaves to the bolls. Timely supply of sufficient nutrients can not only increase boll weight and seed index weight but also improve quality. However, boll fertilizer must not be applied too late; applying it too late will only cause cotton to remain green and mature late.

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