Norvegensis假丝酵母对玉米秸秆瘤胃降解和羔羊生长的影响

IF 0.4 Q4 MULTIDISCIPLINARY SCIENCES
Oscar Ruiz-Barrera, Jesús López-Morones, J. Salinas-Chavira, Y. Castillo-Castillo
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引用次数: 0

摘要

益生菌有助于瘤胃中有益微生物的发育,提高营养物质的消化率,提高反刍动物的生产性能;它也有可能使用营养价值相对较低的玉米秸秆原料,但在一些地方价格低廉。酵母通常被用作益生菌,有报道称使用本地菌株,如北念珠菌。本研究的目的是评估北假丝酵母益生菌对玉米秸秆原位瘤胃干物质降解性和生长羔羊生产性能的影响。在第一个实验中,使用酵母norvegensis(菌株Levazoot 15)[0g(T1)]和5g(T2),通过聚酯袋技术测定了3头瘤胃内有套管的奶牛的玉米秸秆的瘤胃干物质原位降解(RDMD)。酵母对组分(a)、(b)和(a+b)无影响(P>0.05)。在第二个实验中,32只羔羊被随机分配到单独的围栏中105d,以评估4种不同精料比例的日粮:饲料:T1=75:25,T2=75:25;T3=50:50和T4=25:75。除T1外,日粮中添加了15 mL/kg活重的诺氏假丝酵母,相当于干物质基础上的5 g/d酵母。在添加75%精料和酵母(T2)的日粮中,羔羊的增重和饲料转化率最高(P<0.05)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Efecto de Candida norvegensis sobre la degradabilidad ruminal de rastrojo de maíz y el crecimiento de corderos
Probiotics assist in the development of beneficial microorganisms in the rumen that increase digestibility of nutrients and improves the productive performance of ruminants; it also has the possibility of using ingredients as corn stover of relatively low nutritional value, but available in some places at low prices. Saccharomyces yeasts are conventionally used as probiotics and there are reports that use native strains such as Candida norvegensis. The objective of this study was to evaluate the effects of the probiotic of Candida norvegensis on the in situ ruminal dry matter degradability of corn stover and on the productive performance of growing lambs. In the first experiment, the yeast Candida norvegensis (strain Levazoot 15) [0 g (T1)] and 5 g (T2) was used to determine the in situ ruminal dry matter degradation (RDMD) of the corn stover in 3 cows with cannulas in the rumen, which was determined by the polyester bag technique. There was no effect of yeast (P > 0.05) on fraction (a), (b) and (a+b). However, the effective degradability at 1 %/h and 5 %/h of ruminal turnover was higher in T2 (P < 0.05). In the second experiment, 32 lambs were randomly assigned to individual pens for 105 d to evaluate 4 diets that differed in the proportion of concentrate: forage: T1 = 75: 25, T2 = 75:25; T3 = 50: 50, and T4 = 25: 75. With the exception of T1, the diets were supplemented with Candida norvegensis at 15 mL/kg of live weight, equivalent to 5 g/d of yeast in dry matter basis. The lambs in the diet with 75 % of concentrate plus the  yeast (T2) showed greater weight gain and best  feed conversion (P < 0.05). It is concluded that Candida norvegensis showed beneficial effects on ruminal degradability and on the growth of lambs.
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来源期刊
CienciaUat
CienciaUat MULTIDISCIPLINARY SCIENCES-
自引率
33.30%
发文量
24
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