EFFECT OF LOUISIANA SOILS ON CANE JUICE QUALITY

摘要

As part of ongoing investigations on the effect of various field practices on the quality of cane juice, we noted that cane juice color decreased significantly when soil was added to assess the effect of soil on cane juice quality. In a study of the 1999 crop in Louisiana, with addition of 5% and 10% soil to the cane juice, it was noted that polysaccharide was also removed, the first time this had been reported. These observations run contrary to expectations that soil will degrade the quality of cane juice. Raw juice from green cane, which had been topped, but still retained side leaves, was treated with 10% added soil. Two soils from the Louisiana cane growing area, Sharkey clay and Norwood silty clay loam were tested. The juice was treated for 30 minutes in a shaker either at room temperature (25°C) or heated (80 °C). Changes in pH, color, total polysaccharide, ash and filtration rate were noted. Both soils decreased color and total polysaccharide and increased the filtration rate. pH and ash were not significantly changed, nor was the purity.