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Ain Shams University (2016)

NUTRITIONAL PERFORMANCE OF SMALL RUMINANTS FED BY PRODUCTS OF MORINGA UNDER DESERT ENVIRONMENTAL CONDITIONS

Zaki, Essam Aly

Titre : NUTRITIONAL PERFORMANCE OF SMALL RUMINANTS FED BY PRODUCTS OF MORINGA UNDER DESERT ENVIRONMENTAL CONDITIONS

Auteur : Zaki, Essam Aly

Etablissement de soutenance : Ain Shams University

Grade : Doctor of Philosophy (PhD) in Environmental Science 2016

Résumé
The present study was done to investigate the best method to improve the nutritive values of moringa crop residues by solid state fermentation system through two experimental trials. In the first trial 20 adult male Barki rams (four animals each) were used to evaluate the nutritive values of five diets ; moringa stalks treated with brown rote fungi (Trichoderma reesei) (MSF), bacteria (Cellulomonas cellulasea) (MSB) and yeast (Cellulomonas cellulasea) (MSY) comparing with untreated moringa stalks that served as positive control (MS) or berseem hay seveed as negative control (H). In the second trial, twenty four Barki lambs averaged 20.7 kg body weight, were divided into equal 3 groups to study the growth performance for 140 days through 3rations ; C (CFM + berseem hay), MF(CFM + M treated with T. reesei) and MY (CFM+ M treated with S.cerevisiaei). Nutrients digestibility, nitrogen balance, rumen fermentation and carcass characteristics for 3 lambs from each group at the end of the experiment period, were also studied. Results could be summarized as follows : First experiment :  Results exhibited that treated moringa stalks decreased DM, OM, CF, EE, NFE, and ADL contents comparing with untreated MS. But, the CP, ash, NDF, hemicellulose, and cellulose contents were higher in treated MS compared with untreated one.  DM intake was 909, 927, 894 and 688 g/h/d for MSF, MSY, MSB and MS, respectively.  All biological treatments resulted in a significant (P<0.05) higher digestibility of all nutrients compared with untreated MS.  The impact of biological treatments was more obvious with the yeast treatment on TDN and DCP comparing with the other treatments and untreated MS.  Second experiment :  DMI of roughages were 420, 458 and 433 g/d for C, MF and MY, respectively. The values of ADG were 173, 146 and 139g for C, MY and MF, respectively. The values of feed conversion ratio were 7.69, 7.12 and 6.21 kg DMI/ kg gain, for MF, MY and C, respectively.  The insignificant (P<0.05) CF digestibility as well as the TDN value is an interesting observation. Otherwise, MY diet showed the highest (P<0.05) DCP value (10.78%) comparing with MF (8.74%) and C (9.84%) diets.  Dressing percentage expressed as either percent of fasting weight or empty weight were not different (P<0.05) among the experimental groups. The MF and MY groups revealed lower (P<0.05) carcass fat as percent of carcass weight than C group and the corresponding values were 4.47, 4.92 and 7.77%, respectively. The feed cost per kg gain was 18.32, 17.94, 17.70 L.E. for C, MY and MF groups respectively.  It may be concluded that treatment of moringa stalks with T.reesei ; and S. cerevisiae for 21 days seemed to be more suitable for improving its nutritive value to be used in practical feeding either as sole roughage or as included in rations for growing sheep.

Présentation étendue (EULC) -> http://srv5.eulc.edu.eg/eulc_v5/Lib...

Page publiée le 13 février 2019