摘要
为了探索鹅对青贮玉米秸秆利用的可行性与效果，本试验选取24月龄的健康五龙鹅30只，随机分为5组，每组6个重复。各试验组日粮青贮玉米秸秆的比例分别为24．30％、34．60％、42．60％、49．10％、53．60％，采用全收粪法进行代谢试验，检测饲料与粪便中的各种营养成分，确定其消化率，并观察肠道微生物菌群变化。试验结果表明：在代谢能（ME）和粗蛋白质（CP）摄入量基本一致的条件下，随着青贮玉米秸秆添加水平的提高，粗纤维（CF）的消化率为18．16％～48．28％，中性洗涤纤维（NDF）42．68％～58．51％，酸性洗涤纤维（ADF）28．56％～49．32％；氮沉积量、净蛋白质利用率（NPU）各组间差异显著（P〈0．05）；各组粪中的氨态氮（NH3—N）浓度呈下降趋势；除甘氨酸表观消化率偏低但组间差异极显著（P〈0．01）外，其他各种氨基酸表观消化率（AAAD）均较高（77．30％～93．10％）。Ca表观消化率随青贮玉米秸秆添加比例递增呈显著递减趋势（P〈0．05）；P表观消化率在添加53．60％青贮玉米秸秆时显著低于其他各组（P〈0．05）。碱性磷酸酶（AKP）活性与CF、NDF和ADF的消化率呈显著负相关（P〈0．05），与Ca的表观消化率呈极显著正相关（P〈0．01）；谷草转氨酶（GOT）、谷丙转氨酶（GPT）酶活与CF呈显著负相关（P〈0．05），与Ca的表观消化率呈显著正相关（P〈0．05）。青贮秸秆添加量在24．30％～49．10％时，粪便中双歧杆菌、乳酸杆菌数量均随秸杆添加水平的升高而增多（P〈0．05）；大肠杆菌数量总体呈下降趋势。试验说明鹅能较好的利用青贮玉米秸秆中的营养物质，利用青贮玉米秸秆养鹅是可行的。
In order to discuss the effect and feasibility of corn straw silage in geese, thirty healthy twenty-four-month-old Wulong geese were selected and divided into five groups at random, with six geese in each group. The proportion of corn straw silage in each experiment diet was 24.3%, 34.6%, 42.6%, 49.1% and 53.6% respectively. Total feces collection method was adopted to determine the nutrients in feed and feces to confirm their digestibilities, and to observe the change of gastrointestinal flora. The results showed that, under the same content of CP and ME, with the increasing of corn straw silage content, the digestibilities of CF, NDF and ADF were 18.16% -48.28%, 42.68% -58.51% and 28.56% -49.32% respectively; the differences of N aggradation and NPU were significant （P〈0.05） as the increasing of corn straw silage content; the concentration of NH3-N in each group was on descending trend; the apparent digestibilities of all kinds of AA were relatively high （77.30%-93.10%） except Gly which digestibility was low and had significant difference among the groups （P〈0.01）. The apparent digestibility of Ca in different groups decreased with the increasing levels of corn straw silage （P〈0.05）. As to the apparent digestibility of P, it was significantly decreased in the fifth group which contained 53.6% of corn straw silage（P〈0.05） comparing to the other groups. There was a negative correlation between AKP activity and the digestibility of C F, NDF and ADF （P〈0.05）. However,there was a significant positive correlation between AKP activity and the digestibility of Ca（P〈0.01）. The activities of GOT and GPT were significantly negatively correlated with CF（P〈0.05）, but signficantly positively correlated with the apparent digestibility of Ca（P〈0.05）. Besides, the relativity between the apparent digestibility of Ca, P, Met and Cys was inconspicuous （P〉0. 05）. The bacterium number of Bifidobacteria and Lactobacittus in the feces went up as the increasing of the levels of corn straw silage within 24.30%- 49.10% （P〈0.05）, but that of E. Coli showed a descending trend. In a word, goose could make a good use of corn straw silage, and the utilization of corn straw silage in geese was practical.
出处
《动物营养学报》
CAS
CSCD
北大核心
2008年第2期176-182,共7页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家"十五"科技攻关(2004BA514A09-3)
山东省农业良种产业化项目
关键词
青贮玉米秸秆
鹅
消化率
Corn straw silage
Geese
Digestibility
