Resumen

GAYTAN-MASCORRO, Arturo et al. Respuesta del algodón cv. Cian precoz 3 al espaciamiento entre surcos y densidad poblacional. I. Rendimiento, precocidad y calidad de fibra: (con 8 cuadros). Phyton (B. Aires) [online]. 2004, vol.73, pp.57-67. ISSN 1851-5657.

Ultra-narrow rows system and high plant densities, are an alternative to diminish the high cotton production costs, and to increase cotton crop yields. The objective of this work was to learn about the performance of an early cotton variety (CIAN Precoz 3) to ultra-narrow rows and high plant densities cotton production system. Four row distances were evaluated, they were; a single rows 50 cm apart, a single row 76 cm apart, two plant hills 30 cm apart sown on 90 cm beds, and three plants hills 30 cm apart sown on 140 cm beds. Plant densities studied were 8, 12, 15, and 20 plants m-2. Seed and lint cotton yields, yield components, earliness, cover crop close, leaf area index (LAI), and fiber quality were measured. There was no cotton yield response to row distances or plant densities. Fifty cm rows matured the 85% of bolls one week earlier, crop cover closed 10 daysearlier, and developed less LAI, than the 76 cm rows (check). Crop cover close, LAI and yield components were not affected by plant densities. All treatments showed high fiber quality. Benefits of planting cotton in ultra-narrow rows are a short crop cycle and low machinery use.

Palabras clave : Ultra-narrow rows; plant densities; precocity; cotton productivity.

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