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Impacts of Water Deficits on Key Acala Lint Quality Parameters

Dan Munk and Jon Wroble


 
ABSTRACT

Contrasting water management regimes were imposed on Acala Maxxa over a five-year period. High water stress and low stress treatments resulted in a wide range of yield impacts with the premature water terminations having the greatest impact on yield. Gin turnout information and fiber quality measurements including fiber micronaire length and strength are compared to crop yield. An average leaf water potential measurement was developed during the critical flower set period and compared to crop yield. A high correlation exists between average LWP and lint yields for the 1995 to 1997 data evaluations. Gin turnouts were improved as crop water stress increased and yields declined while no change in micronaire was observed. The most sensitive parameters to water stress measured were fiber length and fiber strength. Water management parameters that resulted in high lint yield also tend to produce the longest and strongest fibers both within and between years. Although fiber strength was improved with high yielding treatments, no explanation is offered for the lack of micronaire response.



Reprinted from Proceedings of the 2000 Beltwide Cotton Conferences pp. 696 - 698
©National Cotton Council, Memphis TN

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Document last modified Saturday, Jun 17 2000