섬유

Cotton Yield and Quality-- Yesterday, Today, and Tomorrow

  • 출판일2000.10
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 239
Challenges to the competitiveness of the United States cotton industry include maintaining high yield and fiber quality. Overlapping segmental rate analyses of upland cotton yield trends indicated changes in cotton yield from 1960-1999. The rate of change in yield reversed its negative trend in 1972 and increased up to 1985. The rate of change in yield decreased from 1985 to the present and is currently negative. Yield variance data showed that upland cotton yields became more variable and less reliable after 1980. The Plant Variety Protection Act of 1970 led to more cotton varieties producing more fiber per seed and fewer seeds per acre. Current cotton varieties produce less fiber per seed and more seeds per acre, increasing yield variability. Cotton breeding programs that optimize yield components rather than gross yield would result in more stable yields with better fiber quality.
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