Cottonseed Preparation for Hydraulic Planter
The operation of a newly developed mobile imgator planting system required seed of upland cotton (Gossypium hirsutum L.) to be stored in an aqueous gel slurry for up to 24 h prior to planting. Prolonged anaerobic conditions in the slurry resulted in poor cottonseed germination. Tests were conducted to determine if H2O2 would react with small amounts of starch-based material in the slurry mixture and produce sufficient O2 to maintain seed germination. A laboratory seed germination test was conducted with three seed treatment factors considered (i) seed soaking or priming vs. nonpriming prior to placement in the slurry; (ii) level of H2O2 in the water used to mix the slurry - 0.0, 0.02 and 0.04 M, and (iii) the level of starch-based material in the dry gel concentrate - 0.0, 1.0 and 5.0%. Additional tests were conducted to determine if O2 was produced from H2O2 reacting to components of the seed/gel slurry other than the starch material. The level of starch-based material had no effect on germination, 0.02 and 0.04 M H2O2 solutions significantly improved final cottonseed germination over treatments with no H2O2 and nonprimed seed had significantly higher final germination than the primed seed, Tests indicated the volume of O2 released by H2O2 reacting with cottonseed is far greater than that released by H2O2 reacting with the starch. Therefore, the starch material was not required in the slurry mixtures..Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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