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The Effects of Polymer Coating on Undelinted Cottonseed

David Becker, Norman W. Hopper and Thomas C. Wedegaertner


 
ABSTRACT

In order for modern planting equipment to function properly seeds must readily flow in a singulated manner. The linters and a small amount of long fibers remaining on cottonseed after the ginning process cause the seed to clump together and resist this singulated flowing action necessary for planting. To overcome this problem, essentially all cottonseed intended for planting is delinted using an acid procedure. Concerns associated with acid delinting include potential seed damage, worker safety, waste disposal, and deterioration of equipment exposed to acid. Development of alternative systems for preparing gin run cottonseed for planting purposes could address some of the concerns associated with acid delinting procedures. The objective of this study was to evaluate the effects of different rates of Opadry Ag polymer on germination of reginned cottonseed. Polymer effects on reginned cottonseed were compared to cottonseed ginned once with no polymer application as well as cottonseed that was acid delinted (sulfuric acid) after one and two ginnings. Results from this study indicate that the application of Opadry Ag polymer up to 8% of seed weight does not decrease germination of seed that are reginned, while delinting reginned seed with concentrated sulfuric acid may significantly decrease germination. Polymer applications of 4 and 8% percent of seed weight combined with 4% talc seem to provide a coating with seed flowability that would allow for planting in commercial and research applications.





Reprinted from Proceedings of the 2001 Beltwide Cotton Conferences pp. 549 - 551
©National Cotton Council, Memphis TN

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Document last modified XXXXXX, XXX XX 2001