Performance and digestibility of piglets fed with rations containing alfalfa hay and fructooligosaccharide at the initial phase

SUMMARY Two assays were accomplished being, both using a randomized block design with factorial schema (3x2) where was evaluated three levels of inclusion of alfalfa hay (0.0%; 5.0% and 10.0%) and two levels of fructooligosaccharide - FOS (0,0% and 0.3%). Assay 1 the aimed was to evaluate the performance, was utilized 72 piglets, commercial lineage,, of both genders (one male + one female/cage), six reps with initial weight of 5.95 ± 0.73kg, aged at approximately 21 days. There was no interaction between treatments. In the period from 21 to 59 days of age,, the gain of weight didn’t show differences between treatments. The group that consumed ration with addition of 0.3% of FOS showed highest consumption in comparation with the control group (0.0% FOS). It was observe an improvement on the feed conversion of the diets that didn’t have inclusion of FOS, however, it hadn’t significant difference between the control diet and the others diets in relation to the levels of alfalfa. Assay 2 the objective was to determine the rations nutrients digestibility, nitrogen balance and the digestible and metabolizable energy. It was concluded that the addition of FOS enhances the consumption of diets with alfalfa hay. The addition of alfalfa hay reduced the digestibility coefficients of nutrients except for ether extract, but did not affect the nitrogen balance.

摘要 本研究共开展两项试验，两项试验均采用含3×2析因方案的随机区组设计，评估苜蓿干草（0.0%、5.0%与10.0%）的三个添加水平以及低聚果糖（Fructooligosaccharide, FOS）的两个添加水平（0.0%与0.3%）。试验1旨在评估生长性能，共使用72头商品品系仔猪，兼顾两种性别（每栏1公1母），设置6个重复，初始体重为5.95±0.73kg，日龄约21日。各组处理间无交互作用。在21至59日龄阶段，各组仔猪体重增重无显著差异；添加0.3% FOS的试验组采食量显著高于对照组（0.0% FOS组）。研究观察到，未添加FOS的日粮其饲料转化率有所改善，但对照组日粮与其他苜蓿添加水平日粮间的饲料转化率无显著差异。试验2旨在测定日粮养分消化率、氮平衡以及可消化能与代谢能。结果表明，添加FOS可提升含苜蓿干草的日粮采食量；添加苜蓿干草会降低除醚提取物（ether extract）外的养分消化系数，但对氮平衡无显著影响。