The Effects of Natural and Induced Short-Term Floods On Four Sugarcane Clones.

The effects of natural and induced short-term floods on sugarcane clones Kewali, Mangwa (Saccharum barberi), Guilini and Kacai (Saccharum sinense) were assessed in a field study. From selected clones, photosynthesis (Phs), transpiration (Tr) and stomatal resistance (SR) measurements were taken prior to and after flooding. Plot weight, stalk and leaf dimensions, and sugar content were analyzed at harvest. Brix, Pol and TRS were highest in Mangwa and lowest in Guilin-1 in the plant cane. Stalk number was found to be the most important determinant of sugar yield in plant cane and TRS was the most important one in ratoon crop. Plot weight, stalk number and stalk diameter decreased as flood duration increased from zero to seven days. Short term floods up to 7 d did not adversely affect single leaf photosynthesis. Differences in photosynthesis did not translate into higher sucrose yield. TRS was found to increase with flood duration.