Tannins after Sulph 4C
Posted: 11 Nov 2014, 09:38
REGRESSION ANALYSIS OF TANNIN CONTENT IN POROPHYLLUM RUDERALE PLANTS AFTER APPLICATION OF SULPHUR 4CH
Fonseca, Maira Christina Marques; Casali, Vicente Wagner Dias; Cecon, Paulo Roberto
Medicinal plants like Porophyl um ruderale are more suitable to pathogenesic tests, for
example tannin changes, because they were not disturbed by genetic selections for yield or for
dependence to agrochemicals. A pathogenesic trial under randomized blocks design of three
replicates, eight tannin determinations (each 48 hours) and a control (distiled water) was
conducted in the double blind procedure. Only one application of Sulphur 4CH was done over
the soil of pots containing one plant. Tannin was quantified through Chemist A. O. method in
leaves of the same plant position. Tannin content of control plants remained about the same
from zero to 13 days period (y = 1,4768). Tannin of Sulphur treated plants decreased from the
day of application up to 48th hour but reached minimum value by 96th hour and by 192th hour
it was equal to control plants reaching maximum value by 288th hour decreasing then on until
the end of the trial, what means, 336th hour/13rd day (ŷ = 1,50182 – 0,00921X + 0,00008X 2 –
0,00000015X 3; R2 = 0,95). The adjustment through regression analysis alowed the
interpretation of the data along the short period.
Fonseca, Maira Christina Marques; Casali, Vicente Wagner Dias; Cecon, Paulo Roberto
Medicinal plants like Porophyl um ruderale are more suitable to pathogenesic tests, for
example tannin changes, because they were not disturbed by genetic selections for yield or for
dependence to agrochemicals. A pathogenesic trial under randomized blocks design of three
replicates, eight tannin determinations (each 48 hours) and a control (distiled water) was
conducted in the double blind procedure. Only one application of Sulphur 4CH was done over
the soil of pots containing one plant. Tannin was quantified through Chemist A. O. method in
leaves of the same plant position. Tannin content of control plants remained about the same
from zero to 13 days period (y = 1,4768). Tannin of Sulphur treated plants decreased from the
day of application up to 48th hour but reached minimum value by 96th hour and by 192th hour
it was equal to control plants reaching maximum value by 288th hour decreasing then on until
the end of the trial, what means, 336th hour/13rd day (ŷ = 1,50182 – 0,00921X + 0,00008X 2 –
0,00000015X 3; R2 = 0,95). The adjustment through regression analysis alowed the
interpretation of the data along the short period.