Effects of feeding trace minerals as organic complex for replacement pullets in the period from 7 to 12 weeks old
Effects of feeding trace minerals as organic complex for replacement pullets in the period from 7 to 12 weeks old
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DOI：
10.1590/s1516-35982006000500013
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发表时间：
2006-08-01
期刊：
影响因子：
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通讯作者：
Freitas, Rilke Tadeu Fonseca de
中科院分区：
文献类型：
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作者：
Brito, Jerônimo Ávito Gonçalves de;Bertechini, Antônio Gilberto;Freitas, Rilke Tadeu Fonseca de
本试验旨在研究微量元素有机配合物对7-12周龄雏鸡生产性能和骨骼特性的影响。处理包括以无机形式（对照）和在饮食中包含0.4%的有机形式补充微量矿物质，其分别对应于60、80、70、10、1和0.3ppm的锌、铁、锰、铜、碘和硒的补充水平，以及降低饮食中有机源的水平（0.35、0.3、0.25和0.2%）。试验选用648只7周龄罗曼- LSL鸡，随机分为6个处理，6个重复，18只鸡。直至第12周，未观察到对性能特征和均匀度的显著处理效应。随着日粮有机物添加量的减少，12周龄雏鸡胫骨灰分含量呈线性下降。而无机源（对照）和其他处理（有机源）之间的差异不显著。在第12周，各处理对胫骨锌含量、胫骨和股骨的重量、长度、厚度和跖骨长度无明显影响。微量矿物质有机源具有相对比较优势，可使日粮有机源添加水平降低0.2%，但对7 ~ 12周龄雏鸡的生产性能和骨骼特性无影响。
This experiment was carried out to study the effects of feeding trace minerals as organic complex on the performance and bone characteristics for pullets in the period from 7-12 weeks old. The treatments consisted of the supplementation of trace minerals in the inorganic form (control) and organic form with inclusion of 0.4% in the diet, that corresponds to the supplement levels of 60, 80, 70, 10, 1, and 0.3 ppm of zinc, iron, manganese, copper, iodine and selenium, respectively, and the decreasing dietary levels of organic source (0.35, 0.3, 0.25, and 0.2%). A total of 648 Lohmann - LSL pullets from the 7(th) week old were allotted to a completely randomized design with six treatments and six replicates of 18 birds. No significant treatment effect on performance characteristics and uniformity up to the 12(th) week was observed. There was a linear reduction of ash porcentage in the tibia of pullets in the 12th week as the dietary organic supplement decreased. However there were no significant differences among the inorganic source (control) and the other treatments (organic source). The zinc content in the tibia as well as the weight, length and thickness of tibia and femur and metatarsus length were not affected by the treatments, in the 12(th) week. The trace mineral organic source showed relative comparative advantage and resulted in 0.2% reduction of the dietary supplement level of organic source with no effect on the performance and bone characteristics of pullets from 7 to 12 weeks old.