Velayudhan Deepak E, Dersjant-Li Yueming, Vinyeta Ester, Dusel Georg
Danisco Animal Nutrition & Health (IFF), Willem Einthovenstraat 4, 2342 BH Oegstgeest, the Netherlands.
University of Applied Sciences Bingen, Berlinstrasse 109, 55411 Bingen am Rhein, Germany.
Transl Anim Sci. 2025 May 4;9:txaf060. doi: 10.1093/tas/txaf060. eCollection 2025.
This experiment tested the hypothesis that supplementation of a nutrient- and energy-reduced mixed-cereal diet with phytase, xylanase and β-glucanase, over an entire wean-to-finish growth cycle, would result in growth performance outcomes that were not different from those achieved by pigs fed an unsupplemented, nutritionally-adequate diet. A total of 192 weaned pigs [DanBred × Pi, initial body weight (BW) 7.2 ± 0.4 kg] were assigned to 48 floor pens [4 pigs/pen (2 male, 2 female), 12 pens/treatment], in a completely randomized design. Diets included: 1) a nutritionally adequate wheat, corn and barley-based positive control (); 2) a negative control () based on the PC but without added inorganic P, reduced in Ca, net energy (), digestible amino acids () and Na, supplemented with PhyG at 1,000, 1,000, 750, 500 and 500 FTU/kg in starter I (7 to 11 kg BW), starter II (11 to 25 kg BW), grower I (25 to 55 kg BW), grower II (55 to 85 kg BW) and finisher (85 to 115 kg BW) phases, respectively (NC1 + PhyG low); 3) NC1 further reduced in Ca, digestible AA and NE, (by ≤ 0.03 percentage points, ≤ 0.01 percentage points and ≤ 9 kcal/kg, respectively) supplemented with PhyG at 2,000, 2,000, 1,000, 750 and 750 FTU/kg per phase (NC2 + PhyG high), and; 4) as 2) but further reduced in NE and digestible AA (by 26 to 33 kcal/kg and ≤ 0.01 percentage points, respectively), supplemented with 2,440 XU/kg xylanase and 304 U/kg β-glucanase (NC3 + PhyG low + XB). For the overall period, growth performance (all measures) was maintained in the enzyme-supplemented treatments to a level not different from the PC, whereas in starter II and grower I, BW was increased (+ 1.82 and + 5.11 kg/pig, respectively; < 0.05) and gain:feed was increased ( < 0.05) in NC3 + PhyG low + XB, compared with the PC. Total estimated feed costs per kilogram BW gain (BWG) were lower ( < 0.05) in NC3 + PhyG low + XB (-0.05 € or 7.3%) and the carbon footprint of production was reduced in NC2 + PhyG high and NC3 + PhyG low + XB compared with the PC (by 128 and 145 g CO equivalents per kilogram of BWG, respectively, equivalent to reductions of 6.0% and 6.8%; < 0.05). These results confirm the appropriateness of the applied energy and nutrient reductions for PhyG and PhyG with xylanase-β-glucanase in a mixed-cereal diet from wean to finish and highlight a potential feed cost saving and environmental sustainability benefit of the application.
在整个断奶至育肥生长周期内，在营养和能量降低的混合谷物日粮中添加植酸酶、木聚糖酶和β-葡聚糖酶，其生长性能结果与饲喂未添加但营养充足日粮的猪所取得的结果无差异。总共192头断奶仔猪（DanBred×Pi，初始体重7.2±0.4千克）被完全随机分配至48个地面围栏（每围栏4头猪，2公2母，每个处理12个围栏）。日粮包括：1）营养充足的基于小麦、玉米和大麦的阳性对照（）；2）基于阳性对照但不添加无机磷、钙、净能（）、可消化氨基酸（）和钠含量降低的阴性对照（），在起始料I（体重7至11千克）、起始料II（体重11至25千克）、生长料I（体重25至55千克）、生长料II（体重55至85千克）和育肥料（体重85至115千克）阶段分别添加1000、1000、750、500和500 FTU/千克的植酸酶（NC1+低剂量植酸酶）；3）NC1的钙、可消化氨基酸和净能进一步降低（分别降低≤0.03个百分点、≤0.01个百分点和≤9千卡/千克），各阶段分别添加2000、2000、1000、750和750 FTU/千克的植酸酶（NC2+高剂量植酸酶）；4）与2）相同，但净能和可消化氨基酸进一步降低（分别降低26至33千卡/千克和≤0.01个百分点），添加2440 XU/千克木聚糖酶和304 U/千克β-葡聚糖酶（NC3+低剂量植酸酶+木聚糖酶-葡聚糖酶）。在整个试验期内，添加酶的处理组生长性能（所有指标）维持在与阳性对照无差异的水平，而在起始料II和生长料I阶段，与阳性对照相比，NC3+低剂量植酸酶+木聚糖酶-葡聚糖酶组的体重增加（分别为每头猪+1.82和+5.11千克；<0.05），料重比提高（<0.05）。每千克体重增重（BWG）的总估计饲料成本在NC3+低剂量植酸酶+木聚糖酶-葡聚糖酶组更低（<0.05）（-0.05欧元或7.3%），与阳性对照相比，NC2+高剂量植酸酶组和NC3+低剂量植酸酶+木聚糖酶-葡聚糖酶组的生产碳足迹降低（分别为每千克BWG降低128和145克二氧化碳当量，相当于降低6.0%和6.8%；<0.05）。这些结果证实了在断奶至育肥的混合谷物日粮中对植酸酶以及植酸酶与木聚糖酶-葡聚糖酶组合应用所采用的能量和营养降低水平是合适的，并突出了应用该方法在饲料成本节约和环境可持续性方面的潜在益处。
