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首页> 外文学位 >Protein, phosphorus, and energy utilization in young chickens and pigs as affected by microbial phytase and nutritionally-enhanced corn hybrids.
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Protein, phosphorus, and energy utilization in young chickens and pigs as affected by microbial phytase and nutritionally-enhanced corn hybrids.

机译：受微生物植酸酶和营养增强型玉米杂交种影响的雏鸡和猪的蛋白质，磷和能量利用。

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摘要

Experiments were conducted to evaluate the efficacy of phytase for improving protein-amino acid (AA) utilization in corn gluten meal (CGM) and soybean meal (SBM) for young chickens and pigs using slope-ratio growth, protein accretion, and protein efficiency ratio (g weight gain/g protein intake) assays. Regardless of evaluation method, microbial phytase did not (P > 0.10) affect protein-AA utilization in CGM or SBM for young chickens and pigs, and this inability was not (P > 0.10) altered by dietary excesses of calcium and available phosphorus (P). Also, it was determined that phytase-mediated responses in chicks fed AA- and P-deficient diets were due solely to increased P utilization and not to improved AA utilization. Reducing inorganic P and selected trace-mineral supplementation of late-finishing swine diets did not (P > 0.10) adversely affect growth performance and carcass traits, but resulted in depressed (P 0.05) bone strength, which was ameliorated (P > 0.05) with phytase supplementation. Low-phytate (LP) corn was found to contain two times more (P 0.05) bioavailable P than conventional corn (CONV), and employing LP-corn and microbial phytase, or both, effectively reduced (P 0.05) the need for inorganic P supplementation, and ultimately reduced (P 0.05) P excretion by chicks. Moreover, the P bioavailability advantage in LP-corn over CONV-corn translated to more (P 0.05) bioavailable P in corn gluten feed (CGF) derived from LP-corn compared to that derived from CONV-corn. The most problematic and perplexing observation was the reduced metabolizable energy in corn hybrids containing reduced phytic acid levels. Incorporating the low-phytate trait in either CONV (LP) or in a high protein-high oil hybrid (HPO/LP) reduced the energy value for chickens compared to CONV and HPO controls; it also decreased the energy value of HPO/LP for pigs compared to HPO. These data demonstrate the need for comprehensive evaluation of nutritionally-enhanced grain varieties.
机译：进行了实验，以斜率比生长，蛋白质积聚和蛋白质效率比来评估肌醇六磷酸酶提高玉米蛋白粉（CGM）和大豆粉（SBM）的鸡和猪中蛋白质氨基酸（AA）利用率的功效（g体重增加/ g蛋白质摄入）测试。无论采用哪种评估方法，微生物植酸酶都不会影响（P> 0.10）雏鸡和猪CGM或SBM中蛋白质AA的利用，并且日粮中的钙和有效磷（P> 0.10）不会改变这种能力（P> 0.10）。 ）。同样，已经确定，饲喂AA和P缺乏饮食的雏鸡中植酸酶介导的反应完全是由于增加了P利用率，而不是由于提高了AA利用率。减少无机磷并选择后期矿物质补充微量矿物质对生长性能和did体性状没有不利影响（P> 0.10），但导致骨骼强度降低（P <0.05），改善了（P> 0.05）与植酸酶补充。发现低植酸（LP）玉米的生物利用度P是常规玉米（CONV）的两倍（P <0.05），并且使用LP-玉米和微生物植酸酶或两者同时使用可有效减少（P <0.05）补充无机磷，最终减少雏鸡的P排泄（P <0.05）。此外，与从CONV-玉米获得的相比，LP-玉米在CONV-玉米中的P生物利用度优势转化为来自LP-玉米的玉米面筋饲料（CGF）的生物利用度更高（P <0.05）。最有问题和困惑的观察是含有植酸水平降低的玉米杂交种的代谢能降低。与CONV和HPO对照相比，在CONV（LP）或高蛋白-高油杂种（HPO / LP）中加入低植酸性状可降低鸡的能量值；与HPO相比，它还降低了猪的HPO / LP能量值。这些数据表明需要对营养增强的谷物品种进行全面评估。

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  • 作者

    Peter, Christopher Matthew.;

  • 作者单位

    University of Illinois at Urbana-Champaign.;

  • 授予单位 University of Illinois at Urbana-Champaign.;
  • 学科 Agriculture Animal Culture and Nutrition.; Environmental Sciences.
  • 学位 Ph.D.
  • 年度 2001
  • 页码 204 p.
  • 总页数 204
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 饲料;环境科学基础理论;
  • 关键词

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