FOLIAR DIAGNOSIS OF SUGARCANE - VARIATION OF lEAF POTASSIUM VALUE WITH AGE OF CANE AND RAINFALL
نویسنده
چکیده
The top visible dewlap leaf potassium (K) of sugarcane ratoons varies in an irregular manner with age ofcane. However, by increasing the number of leaf samplings, the fluctuation of the mean K values with age becomes less and less significant. As a result in Mauritius, where the running average leaf K concentration of 3 consecutive years of double leaf sampling is interpreted, age corrections of the analytical leaf K value will not have a noteworthy impact on the accuracy of foliar diagnosis for K status. Examination of daily rainfall which fell 30 days prior to leaf sampling failed to reveal the exact significance of moisture regime on the K nutritional status ofsugarcane. In some instances a high rainfall prior to leaf sampling gave rise to a high leafK value, while in other instances at the same site the opposite was true.
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