ANALYSIS OF GROWTH IN CULTIVATING OF CANA-DE-AÇÚCAR IN CANEBEATS IN THE NORTHWEST OF THE PARANÁ IN THE HARVEST OF 2002/2003

Abstract

The objective of this work was to study the growth indices, through the analysis of growth, cultivating them of sugar cane of sugar, RB845197, RB845210, RB855113, RB855536 and RB928064, in cycle of first beats, in Paranavaí, region the northwest of the State of the Paraná, in harvest 2002/2003. Seven evaluations had been carried through, in an interval of 50 days, with collection of plants in a rowser meter, for evaluation, being gotten the foliar area and dry leaf mass and culm. Computational program ANACRES was used, for attainment of the following indices of growth: net assimilation rate, relative growth rate , leaf area specific and leaf area ratio. It did not have difference enters to cultivate them how much to the behaviors of the curves of the esteem indices. Being able itself to conclude that the leaf area ratio and net assimilation rate, had equal it influences on the observed estimates of relative growth rate. With the gotten results, it can be formed three groups of behavior of cultivating studied them: 1º) RB855536 and RB845197; 2º) RB845210 and RB928064 and 3º) RB855113.