Fiber Property Variability from Bale to Bale
Mar 27, 2019
Cotton (Gossypium hirsutum) fiber variability at the bale level is a composite of fiber properties contributed by individual bolls. Environmental conditions, crop management and genotype have an impact on fiber property variability at the boll and seed level. Cotton plants (DPL 51, 1995; NuCOTN 33B, 1996) were grown under rainfed (RF) and centre-pivot irrigated (IR) conditions at Perthshire Farms, Gunnison, MS. Plants were mapped prior to harvest. Fields were spindle picked and grab samples were taken pre and post ginning. Fiber samples from individual bolls and representative samples were analyzed using the Advanced Fiber Information System (AFIS). In 1995 cotton plants (RF, I) showed similar boll distribution patterns with 50% of the bolls located at the first position on fruiting branches. Fiber length and micronaire (micronafis) varied with mainstem node location. Composite fiber properties were similar for rainfed and irrigated cotton (1995). Boll distribution patterns were different for rainfed and irrigated plants in 1996. Composite fiber length properties were similar but micronaire (micronafis) was lower for irrigated cotton (1996). Lint cleaning (one lint cleaner) did not increase short fiber (<12.7 mm) percentages. A main contributor to fiber property variability at the bale level was variability at the boll level rather than ginning procedures.