Volatilização do HCN e determinação do ponto de feno em folhas de faveleira (Cnidoscolus quercifolius)

Abstract

The hydrocyanic acid can be easily volatilized when the plant or part in it, is subjected to sun and heat. However, when the temperature exceeds 75 ° C linamarase enzyme responsible for the hydrolysis of linamarin and release HCN, is denatured, releasing the stopping HCN and thereby maintaining toxic levels and disabling the use of feed, because it has been done in an experiment in a rural property in the municipality of Valente-Ba, in order to observe the removal of cyanide volatilization in faveleira hay. In the first chapter using as reagent 5-Br-PADAP for quantification of cyanide in the process of drying in the sun and in the shade, there was a significant reduction in average grades, 1200 mgkg-1 at time zero, and as 96 hours dehydration was observed value of 457 mgkg-1 and 380 mg.kg-1 respectively. In the work using titration with silver nitrate after 96 hours of drying CCT values were about 180 mgkg-1. In the dehydration of faveleira leaves exposed to sound the first 48 hours was the great loss of water and stabilizing 72 hours, which determined the lay of hay, with an average content of 90% dry matter, corresponding to 10% moisture. Regarding the drying process in the shadow of the first 72 hours, there was a significant loss of water and approximately 96 AM there was a stabilization of moisture loss, thus determining the hay point with an average content of 87.3% of dry matter , corresponding to 12.3% moisture.