Evaluation of Plant Spacing on Growth and Yield Performance of the Cotton Elite Line
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Abstract
The growth and yield of cotton are influenced by several factors, including variety, environmental conditions, and management practices such as soil, water, fertilizer, weed, and pest control. Plant spacing, or plant population, is another critical factor that directly affects yield. This study aimed to determine the optimal planting spacing for the cotton elite line V1/TF86-8-B-B-B-47B to achieve high yield and good fiber quality. The field e×periment was conducted at the Nakhon Sawan Field Crops Research Center from June to December 2023 and was arranged in a randomized complete block design (RCBD) with five replications. The treatments consisted of four planting spacings: 1) 1.00 × 0.50 meters, 2) 1.25 × 0.50 meters, 3) 1.50 × 0.50 meters, and 4) 1.75 × 0.50 meters. The results showed no statistically significant differences among the treatments in terms of plant height, number of sympodial branches, and number of fruiting branches per plant. However, seed cotton yield was highest at the closest spacing of 1.00 × 0.50 meters, with an average yield of 695 kilograms per rai, followed by 1.25 × 0.50 meters, which yielded 628 kilograms per rai. Fiber quality was found to be similar across all spacing treatments. Therefore, the optimal planting spacing for the cotton elite line V1/TF86-8-B-B-B-47B is 1.00 × 0.50 meters, equivalent to a plant population of 3,200 plants per rai.
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