策略性减少营养和补充外源酶对生长猪矿物质和能量平衡的影响。

IF 2.5 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Gerardo Ordaz, Sergio Gómez, María de Lourdes Angeles, Maria Alejandra Pérez
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引用次数: 0

摘要

目的:本研究评估策略性营养减少与外源酶(植酸酶、果胶酶和β-葡聚糖酶)联合使用对生长猪矿物质和能量平衡的影响。方法:选取24头平均初始体重为49.26±0.42 kg、年龄为97±5日龄的公猪,分别饲养于代谢笼内。饲粮饲喂10 d,包括5 d的预试期和5 d的总收集平衡期。猪被分配到四种试验处理:阳性对照饲粮(PC-100),具有标准水平的代谢能(ME)、钙、磷和矿物质预混料;阴性对照饲粮(NC-100)在添加酶混合料的基础上,减少100千卡/千克代谢能、0.05%钙和0.10%磷的矿物质预混料;另外两种以NC-100为基础的饲粮,矿物预混料分别减少33% (NC-67)和66% (NC-34)。测定生产性能、粪便表观消化率(AFD)、营养物质保留率和能量效率。结果:饲粮中矿物质含量减少(与推荐水平相比分别减少33%和66%)和外源酶对日增重和饲料效率无显著影响(p < 0.05)。然而,总氮排泄量显著降低(从13.66 g/d降至10.72 g/d, p < 0.001),保留氮相对于吸收氮的比例增加(从PC-100的73.46%增加到NC-34的81.69%,p = 0.0025)。添加酶可显著提高磷的消化率(NC-100最高达74.89%,p < 0.01),锌的消化率随矿物预混料的减少而显著提高(NC-34最高达50.01%,p < 0.01)。各处理间代谢能保持稳定(p = 0.06),平均值在3593 ~ 3642 kcal/kg之间。结论:在外源酶的配合下,有策略地降低饲粮中矿物质含量(与推荐水平相比分别降低33%和66%)和能量,提高了生长猪对营养物质的利用,且不会对短期生长性能产生负面影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of strategic nutrient reduction and exogenous enzyme supplementation on mineral and energy balance in growing pigs.

Objective: This study evaluated the effects of strategic nutrient reduction in combination with exogenous enzymes (phytase, pectinase, and β-glucanase) on mineral and energy balance in growing pigs.

Methods: Twenty-four barrows (age: 97±5 days) with an average initial body weight of 49.26±0.42 kg were individually housed in metabolism crates under controlled conditions. Diets were offered for 10 days, consisting of a 5-day adaptation period followed by a 5-day total-collection balance period. Pigs were assigned to four experimental treatments: a positive control diet (PC-100) with standard levels of metabolizable energy (ME), calcium, phosphorus, and mineral premix; a negative control diet (NC-100) with the same mineral premix but reduced by 100 kcal/kg ME, 0.05% calcium, and 0.10% phosphorus, supplemented with the enzyme blend; and two additional diets based on NC-100 with a 33% (NC-67) and 66% (NC-34) reduction in the mineral premix. Productive performance, apparent fecal digestibility (AFD), nutrient retention, and energy efficiency were measured.

Results: Results showed that mineral reduction (33% and 66% vs. the recommended level) together with exogenous enzymes did not affect daily weight gain or feed efficiency (p > 0.05). However, a significant decreased total nitrogen excretion (from 13.66 to 10.72 g/day; p < 0.001), and increased proportion of retained nitrogen relative to absorbed nitrogen (from 73.46% in PC-100 to 81.69% in NC-34; p = 0.0025) were observed. AFD of phosphorus improved with enzyme supplementation (up to 74.89% in NC-100; p < 0.01), and zinc digestibility increased significantly with mineral premix reduction (up to 50.01% in NC-34; p < 0.01). ME remained stable among treatments (p = 0.06), with average values ranging from 3,593 to 3,642 kcal/kg.

Conclusions: Strategic reduction of dietary minerals (33% and 66% vs. the recommended level), and energy, in combination with exogenous enzymes, improved nutrient utilization without negatively affecting short-term growth performance in growing pigs.

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来源期刊
Animal Bioscience
Animal Bioscience AGRICULTURE, DAIRY & ANIMAL SCIENCE-
CiteScore
5.00
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0.00%
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223
审稿时长
3 months
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