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首页> 美国卫生研究院文献>Veterinary and Animal Science >Grazing behavior dietary value and performance of sheep goats cattle and camels co-grazing range with mixed species of grazing and browsing plants
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Grazing behavior dietary value and performance of sheep goats cattle and camels co-grazing range with mixed species of grazing and browsing plants

机译：放牧行为养猪山羊牛和骆驼共同放牧范围的放牧行为野外放牧和浏览植物的混合品种

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A study was conducted to assess grazing behavior (GB), dietary value and performance of co-grazing sheep, goats, cattle and camels with initial body weights (BW) of 20.6 ± 2.09, 16.6 ± 0.97, 96.8 ± 3.43 and 162.3 ± 21.28 kg, respectively. Grazing lasted 16 weeks, using 6 growing animals per animal species. Animals co-grazed 6 ha of range containing grass, forb and browse species. GB observations for position and activity were made during day light. In weeks 4, 8 and 14 hand-plucked forages similar to that being selected by animal species were sampled for laboratory evaluation. BW was measured initially and at 28-days interval. Time allotted for feed consumption (grazing plus browsing), ruminating and idle was similar among animal species. However, camels and goats spent lower time grazing and higher time browsing than sheep and cattle. The CP content of hand-plucked forages was highest for camels (16.8%), intermediate for sheep (9.3%) and goats (10.2%) and lowest for cattle (4.5%); while NDF values took opposite trend. The IVDMD contents of forages took the trend of CP contents and were 55.8, 51.0, 43.6 and 72.8% for sheep, goats, cattle and camels, respectively. Daily BW gain was 34, 31, 94 and 358 g/day and BW change as percentage of initial BW was 19, 22, 11 and 26% for sheep, goats, cattle and camels, respectively, the former was higher for camels and the latter was lower for cattle. These results indicated reduced dietary overlap among animal species and consequently greater animal yield through co-grazing than perhaps could have achieved through mono-species grazing.
机译：进行了一项研究以评估放牧行为（GB），共放牧绵羊，山羊，牛和骆驼的膳食价值和性能，初始体重（BW）为20.6±2.09,16.6±0.97,96.8±3.43和162.3±21.28 kg分别。放牧持续16周，每只动物物种使用6种生长动物。动物共同放牧6公顷，含有草，FORB和浏览物种。在白天的光线下进行地位和活动的GB观察。在数周的4,8和14个类似于动物物种选择的手中的伪造物，用于实验室评估。 BW最初测量，间隔28天。分配给饲料消耗的时间（放牧加上浏览），反刍和闲置在动物种类中相似。然而，骆驼和山羊花费较低的时间放牧和比羊和牛更高的时间浏览。骆驼（16.8％），羊（9.3％）和山羊（10.2％）和牛的最低（4.5％）的骆驼的CP含量最高。虽然NDF值相反的趋势。 IVDMD的饲料含量占CP内容的趋势，分别为55.8,51.0,43.6和72.8％，分别用于绵羊，山羊，牛和骆驼。每日BW增益为34,31,94和358克/天，因为初始BW的百分比为19,22,11和26％，分别为绵羊，山羊，牛和骆驼的百分比，前者对于骆驼和骆驼更高后者对牛较低。这些结果表明动物物种之间的膳食重叠减少，因此通过共同放牧的共同饲养的动物产量大于可以通过单物种放牧来实现。

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