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Mass balance of nutrients for the swine finishing phase: Effects of dietary manipulation on nutrient retention, nutrient excretion, and gaseous emissions

机译：猪肥育阶段营养物质的质量平衡：饮食控制对营养物质保留，营养物质排泄和气体排放的影响

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摘要

Scope and method of study. A total of 3 experiments were conducted to evaluate the effects of reducing dietary CP, P, and trace minerals on DM, N, P and mineral excretion, and ammonia and hydrogen sulfide emissions during the finishing period. The control was a fortified corn-soybean meal-based diet. The experimental diet was a low nutrient excretion (LNE) diet similar to the control with the exceptions that CP (2% units in Experiment 1, 4% units in Experiment 2, and 3% units in Experiment 3) and P (0.1% units in the 3 experiments) were reduced, phytase added (Experiment 3), and trace minerals sequentially reduced (Experiment 3).;Findings and conclusions. The LNE diet with 2% units reduction in CP reduced daily N and P excretion by 20% and 24%, respectively, and tended to reduce cumulative N and P excretion in a similar proportion. However, feeding LNE with 2% units reduction in CP had little effect on daily and total mineral excretion during the finishing period. When CP was further reduced by 4% units, daily N and P excretion was reduced by 40 and 25%, respectively, and cumulative N and P excreted for the entire period by 1.36 and 0.14 kg/finished pig, respectively, during a 112-day finishing period. When CP was reduced by 3% units, P by 0.1% unit, phytase added, and trace mineral inclusion reduced, nutrient excretion and ammonia emission was markedly decreased during the finishing period. The proportion of N and P entering the finisher that exited via the pigs increased from 47 to 58% for N and 37 to 48% for P for pigs fed LNE compared with those fed the control. These results suggest that reductions in dietary CP, P and trace minerals in growing-finishing diets markedly decreased DM, N, P and mineral excretion, and ammonia emission, without affecting pig growth performance or fat-free lean gain. Therefore, dietary manipulation is an effective strategy to reduce nutrient excretion and ammonia emissions simultaneously.
机译：研究范围和方法。总共进行了3个实验，以评估减少日粮中CP，P和微量矿物质对肥育期DM，N，P和矿物质排泄以及氨和硫化氢排放的影响。对照是强化的玉米-大豆粉饮食。实验饮食是低营养排泄（LNE）饮食，与对照组相似，但CP（实验2，实验2、3、3）和P（0.1％）分别为2％单位和3％。在3个实验中）减少，添加植酸酶（实验3），并依次减少痕量矿物质（实验3）.;发现和​​结论。降低CP 2％的LNE日粮分别使每日N和P排泄量减少20％和24％，并倾向于以相似的比例减少累积N和P排泄量。但是，饲喂LNE的CP降低2％的单位对精整期间的每日和总矿物质排泄影响不大。当CP进一步降低4％单位时，每日的N和P排泄分别减少40％和25％，并且在整个112-112头猪的整个过程中，累积的N和P排泄分别为1.36和0.14 kg /头。一天的整理期。当CP降低3％单位，P降低0.1％单位，添加植酸酶，微量矿物质夹杂物减少时，养分排泄和氨气排放量显着降低。与饲喂LNE的猪相比，通过LNE进入育肥猪的N和P的比例从N的47％增至58％，P的37％增至48％。这些结果表明，日粮中日粮中CP，P和微量矿物质的减少显着降低了DM，N，P和矿物质的排泄以及氨的排放，而不会影响猪的生​​长性能或无脂瘦肉。因此，饮食控制是减少营养物排泄和氨气排放的有效策略。

著录项

  • 作者

    Lachmann Sevilla, Mariela Beatriz.;

  • 作者单位

    Oklahoma State University.;

  • 授予单位 Oklahoma State University.;
  • 学科 Animal sciences.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 267 p.
  • 总页数 267
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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