Influence of K/N relationship in fertilization on potassium content and activity of soluble invertases in sugarcane meristem.

TL;DRAbstract

Potassium was applied to sugarcane using six KIN levels (from 0 to 2.5) with two back applications of N and P. Potassium content and activity of acid and neutral soluble invertases in the meristem were studied. No significant differences were found among KIN levels or between back applications for invertases activity levels inspite of the significant differences found in potassium content. This seems to be connected with the high levels of potassium because even for K/N = 0 mean values higher than 5% for potassium were obtained. The variation of the activity of both invertases during the development cycle of plant showed low levels at the beginning of the biological cycle and increased during the boom stage, and decrease of acid invertase and increase of neutral invertase at maturity. -

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