Effect of sodium hydroxide treatment on fiber fraction, digestibility and tannin of jurema-preta hay (Mimosa tenuiflora. Wild)

[摘要] Experiment was carried out with the goal to evaluate the effect of sodium hydroxide (NaOH) on fiber fraction, tannin level and dry matter in vitro digestibility of jurema-preta hay. Leaves were harvested by hand and dried under shadow. Chemical treatment was done by pulverization of hay with 0; 2; 4; 6 and 8% NaOH solution following the proportion of 1 liter of solution to 1 kg of hay. Samples of hay were submitted to determinations of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), tannin and DM in vitro digestibility which were the variables analyzed. Design completely randomized was used with five treatments and four repetitions. NaOH treatment caused linear effect in DM, hemicellulose and tannin contents; while for NDF and ADF was observed quadratic effect. CP was not affected and DMIVD was improved by NaOH concentration increase. DMIVD estimated by tannin content need to be more studied, instead of its significance.

[学科分类] 兽医学

[关键词] acid detergent fiber;neutral detergent fiber;legume;NaOH    Introdução A jurema-preta é uma leguminosa facilmente encontrada na caatinga;altamente resistente à seca;com grande capacidade de rebrota durante todo o ano e;de acordo com Vieira et al