Author
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Glaz, Barry |
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Submitted to: Sugar Journal
Publication Type: Abstract Only Publication Acceptance Date: 5/1/2003 Publication Date: 6/1/2003 Citation: Glaz, B. 2003. Sugarcane genotype emergence after rain-caused flood. Sugar Journal 66(1):29. Interpretive Summary: Technical Abstract: Sugarcane (Saccharum spp.), the primary crop on the Histosols of the Everglades Agricultural Area, increasingly is exposed to periodic floods or undesirably high water tables. Short-duration floods soon after sugarcane is planted can be particularly damaging. The purposes of this study were to quantify the effects on emergence of floods of 0, 1, 2, 4, and 6 days, and determine if emergence percentages of five genotypes differed in response to these flood durations. Two experiments, each with five replications, were conducted in 2002, one planted in August and one in October. Three or four stalk sections about 50 cm in length were planted in flats 10 cm deep and 35 cm wide, and covered with soil. Genotypes were chosen based on range of emergence response under flood in commercial fields. Effect of flood duration on emergence was best described as linear (r2 = 0.93) in the first experiment and quadratic (r2 = 0.99) in the second experiment. Emergence declined by 7.5% due to each additional day under flood in the first experiment. In the second experiment the 1- and 2-day floods did not affect emergence, the 4-day flood reduced emergence by 11%, and the 6-day flood reduced emergence by 30%. CP 72-2086 had extremely low emergence when exposed to the 6-day flood. Four unreleased genotypes were tested and none had more emergence than CP 89-2376 under the 6-day flood. Identifying genotypes with improved emergence after exposure to floods greater than 4 days would reduce losses due to flood at planting caused by heavy rains. |
