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首页> 外文期刊>Berliner und Munchener Tierarztliche Wochenschrift >Studies on the effect of Rare Earth Elements as a possible alternative growth promoter for pigs and poultry [German]
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Studies on the effect of Rare Earth Elements as a possible alternative growth promoter for pigs and poultry [German]

机译：研究稀土元素可能作为猪和家禽的替代生长促进剂的作用[德国]

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摘要

Mixtures of Rare Earth Elements (REE) have been used as animal growth-promoters on a large scale in China during the last 20 years. Numerous studies carried out in China claim it produces quite sensational growth-promoting effects in all categories of farm animals. To explore the question of whether REE's might prove suitable as a growth-promoter under western keeping conditions, feeding experiments were performed on pigs and poultry. The animals received a typical diet, supplemented with REE salts in concentrations between 75 and 300mg/kg feed. Weight-gain, feed-intake, feed-conversion and (where applicable) laying parameters were observed. It was shown that in pigs recieving feed supplemented with REES, an increase in daily weight gain of up to 19% and an improvement in feed-conversion of up to 11% can be achieved, whereas, for poultry, no positive effects on growth or productivity of the animals could be observed. Testing of important organs via Neutron Activating Analysis (NAA) showed a minute accumulation of REE, principally in liver and bones. Analysis of the poultry gut-flora, using selective media, showed that the main microorganism populations of the alimentary canal were unaffected by feed-supplementation with REE.
机译：在过去的20年中，稀土元素（REE）的混合物已在中国大规模用作动物生长促进剂。在中国进行的大量研究声称，它在所有种类的农场动物中都产生了相当刺激的生长促进作用。为了探讨在西方饲养条件下稀土元素是否可能适合作为促进生长的问题，对猪和家禽进行了饲养实验。这些动物接受常规饮食，并添加浓度为75至300mg / kg饲料的REE盐。观察了增重，饲料摄入，饲料转化和（如适用）产蛋参数。结果表明，在接受补充REES饲料的猪中，日增重最多可增加19％，饲料转化率最多可增加11％，而对于家禽，对生长或繁殖没有积极影响。可以观察到动物的生产力。通过中子活化分析（NAA）对重要器官进行的测试表明，微量的REE主要在肝脏和骨骼中积累。使用选择性培养基对家禽肠道菌群进行分析，结果表明，REE的饲料补充不会影响消化道的主要微生物种群。

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