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1 Lucrări ştiinţifice Zootehnie şi Biotehnologii, vol. 40(1), (2007), Timişoara. THE EFFECT OF DIET SULEMENTATION WITH TWO LEVELS OF MANNANOLIGOSACCHARIDE ON THE ERFORMANCE OF GROWING RABBITS EFECTUL A DOUĂ NIVELE DE MANANOLIGOZAHARIDE INTRODUSE ÎN HRANĂ ASURA RODUCTIVITĂŢII TINERETULUI CUNICUL SILION (NEO) SIMINA ILIANA, BURA M., DRINCEANU D., NICULA MARIA Faculty of Animal Sciences and Biotechnologies, Timişoara, România The present study has been conducted to compare the effects of two levels of mannanoligosaccharide on the performance of rabbits. A total of 54 rabbits have been randomly divided into 3 treatment groups (equal in number and with insignificant different live weight). All the 54 rabbits have been weaned at 35 of age and kept in wire fattening cages: 6 rabbits/cage, and 18 per group. They have been observed for seven weeks. Rabbits of the control group were fed with a basal diet. Rabbits of the 2 experimental groups were fed the same diet supplemented with Bio Mos 0.1% respectively 0.2%. Key words: rabbits, mannanoligosaccharide, growth performance. Introduction Growing rabbits are very sensitive to digestive disorders. In any production system it is critical to keep a stable microbial population in order to optimize rabbit performance, livability and health. For the past several decades antibiotic growth promoters have been included in animal feeds at sub-therapeutic concentrations as a standard practice because of their positive effects on weight gain, feed utilization and mortality (2). On the base of consumer s demand, the European legislation is banning the use of antibiotics as growth promoters and is working towards a reduction of therapeutic antibiotics for all livestock production, to avoid crossed resistance in humans and to improve food safety (3). robiotics and prebiotics appear as possible alternative feed additives to modulate intestinal micro flora and to improve animal health (1). The aim of the present trial was to evaluate different inclusion levels of mannanoligosaccharide as natural growth promoters on performance of rabbits. 535

2 Materials and Methods Researches were carried out using as experimental animals 54 rabbits weaned at 35 of age. The rabbits have been randomly divided into 3 treatment groups (equal in number and with insignificant different live weight), and kept in wire fattening cages: 6 rabbits/cage, and 18 rabbits per group. The rabbits of the control group were fed a basal diet. Rabbits of the 2 nd experimental group were fed the same diet supplemented with Bio Mos 0.1% respectively 0.2%. Table 1 The experiment organizing scheme: Age () Control Experimental variants L.M. L.E. I L.E.II N.C.+alfalfa hay N.C.+alfalfa hay + 0.1% BioMos N.C.+alfalfa hay+ 0.2% BioMos Results and Discussions The evolutions of the body weight at young rabbits are reported in Table 2 and Figure 1. From the summarized data presented in Table 2 we can observe that the initial body weight was relatively homogenous and did not differ between experimental variants. We report improvements in rabbit performance for the experimental variants which received 0.2% BioMos compared with 0.1% BioMos and control. At the end of the experiment, the body weight was: g for the control group, g for L.E.I and g for L.E.II. There is a difference of g (18.6%) favorable to EI experimental group as compared to the control group, a difference which is very significant from the statistic point of view. Between the control group and the E II experimental group there is a difference of g (29.881%) favorable to the E II experimental group, a difference which is very significant from the statistic point of view. In the same time, between the two experimental groups very significant differences were also noticed. 536

3 Table 2. The body weight evolution of young rabbits in experimental variants Age () Dispersion values / indexes L.M L I. L II X+S X S C.V (N.S.) (N.S.) (N.S.) X+S X S C.V (*) (N.S.) (N.S.) X+S X S C.V (***) (***) (N.S.) X+S X S C.V (*) X+S X S C.V (***) 537

4 The evolution of the average daily gain Table 3 Days Dispersio n values / Indexes Weekly gain (g) Average daily gain (g) L.M. L.E.I L.E.II L.M L.E.I L.E.II X+S X S C.V (**) (**) (**) (**) 0.08 (N.S.) 0.08 (N.S.) X+S X S C.V ,109 (N.S.) 0,109 (N.S.) X+S X S C.V (***) (***) X+S X S C.V (***) X+S X S C.V (**) 0.01 (**) (***) (***) (**) (**) 538

5 weight of LE II weight of LE I weight of LM age in Fig. 1. The body weight evolution of young rabbits Conclusions Analyzing the data obtained during this experiment our conclusions are: the concentrate feed supplementation with Bio Mos (0.1% and 0.2%), influence favorable the body weight when compared to the control group. best results are obtained when using Bio Mos 0.2% (L.E.II), the gain is g, versus in L.M. the initial body weight was relatively homogenous and did not differ between the experimental variants. (L.M.: ±22.422; L.E.I.: ± ; L.E.II.: 477 ±25.97); At the end of the experiment, the body weight was: g for the control group, g for L.E.I and g for L.E.II. Bibliography 1. Girard I.D,. Geliot and. Spring, (1997)-Effects of dietary mannan oligosaccharide on performance of fattening rabbits, In: roc. International Symposium on Non Digestible oligosaccharide: Healthy Food for the Colon? Dec. 4 5 Alltech Inc. Tech. Report D. Guillou and ierre Arveux. (June 2000) Research and Development Department, CRZA Research Center, Chateau Thierry, France, A natural alternative to antibiotic growth promoters in rabbit production: experience with Bio Mos in France. 3. A. Kocher,. Spring, D. Hooge (May 2004) Rabbits may respond positively to dietary MOS. Feedstuffs May 31, vol 76 No

6 EFECTUL A DOUĂ NIVELE DE MANANOLOGOHARIDE INTRODUSE ÎN HRANĂ ASURA RODUCTIVITĂŢII TINERETULUI CUNICUL SILION (NEO) SIMINA ILIANA, BURA M., DRINCEANU D., NICULA MARIA Faculty of Animal Sciences and Biotechnologies, Timişoara, România Acest experiment a fost realizat cu scopul de a compara efectul asupra productivităţii tineretului cunicul a două doze diferite de mananoligozaharide. 54 iepuraşi au fost împărţiţi în 3 loturi experimentale (egale ca număr: 18 indivizi/lot, şi cu diferenţe nesemnificative în ceea ce priveşte greutatea corporală la momentul începerii experimentului (L.M.: 489,22±22,42g; L.E.I: 475,77±30,44g; L.E.II: 477±25,97g). Iepuraşii au fost înţărcaţi la vârsta de 35 de zile, iar pe durata de desfăşurare a experimentului au fost cazaţi în cuşti confecţionate din plasă de sârmă, repartizându-se câte 6 indivizi/cuşcă. Iepuraşii din lotul martor au fost hrăniţi cu o raţie de bază iar iepuraşii din loturile experimentale au primit aceeaşi raţie ca şi exemplarele din lotul martor la care s a adăugat aditivul furajer după cum urmează: 0,1% mananoligozaharide pentru L.E.I şi 0,2% mananoligozaharide pentru L.E.II. Durata de desfăşurare a experimentului a fost de 7 săptămâni, perioadă în care s a urmărit efectul dozelor de aditiv furajer asupra sporului în greutate a indivizilor care alcătuiau loturile experimentale. Ca urmare a administrării mananoligozaharidului Bio Mos în proporţie de 0,1% respectiv 0,2%/Kg furaj la tineretul cunicul după înţărcare, putem trage următoarele conclizii: pe întreaga perioadă experimentală, la ambele loturi la care în furajul combinat s au introdus mananoligozaharide greutatea iepurilor a fost superioară comparativ cu cea a lotului martor; cele mai bune rezultate în ceea ce priveşte dinamica creşterii au fost obţinute în cazul lotului experimental II (la care s a realizat o suplimentare cu 0,2%); iniţial, loturile nu au prezentat diferenţe semnificative în ceea ce priveşte greutate medie vie (L.M.: 489,222±22,422; L.E.I.: 475,777±30,441; L.E.II.: 477±25,97). La sfârşitul perioadei experimentale însă, s au înregistrat diferenţe foarte semnificative atât între lotul martor şi cele două loturi experimentale, dar şi în cazul loturilor experimentale între ele. Cuvinte cheie: iepuri, mananoligozaharide, performanţe de creştere. 540

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