微生物和真菌植酸酶可影响不同非植酸磷水平日粮肉仔鸡的生长性能、养分消化率及血液指标。
Microbial and Fungal Phytases Can Affect Growth Performance, Nutrient Digestibility and Blood Profile of Broilers Fed Different Levels of Non-Phytic Phosphorous.
作者信息
Attia Youssef A, Bovera Fulvia, Iannaccone Francesco, Al-Harthi Mohammed A, Alaqil Abdulaziz A, Zeweil Hassan S, Mansour Ali E
机构信息
Arid Land Agriculture Department, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, P.O. Box 80208, Jeddah 21589, Saudi Arabia.
Department of Veterinary Medicine and Animal Production, University of Napoli Federico II, via F. Delpino 1, 80137 Napoli, Italy.
出版信息
Animals (Basel). 2020 Mar 30;10(4):580. doi: 10.3390/ani10040580.
A total of 420 day old chicks were divided into seven groups (5 replicates of 12 chicks/group) fed isoproteic and isoenergetic diets. The control group was fed diets containing 0.50%, 0.45% and 0.40% of non-phytic phosphorous (nPP) in starter (1-35), grower (37-56) and finisher (57-64 d) periods, respectively. The three intermediate nPP (IntnPP) groups were fed diets with 0.40%, 0.35% and 0.30% nPP according to the growth period and were submitted to three dietary treatments: unsupplemented; supplemented with 500 FTU/kg diet of an phytase (IntnPP_fp) and supplemented with 500 FTU/kg diet of an phytase (IntnPP_bp). The three low nPP groups fed diets contained 0.30%, 0.25% and 0.20% nPP and were submitted to the same dietary treatments than IntnPP to obtain LnPP, LnPP_fp and LnPP_bp groups. IntnPP and LnPP groups had lower body weight gain and feed, crude protein (CP) and metabolizable energy (ME) intake ( < 0.05) than the control. Feed conversion ratio of IntnPP was more favorable ( < 0.01) than the LnPP group. CP and ME conversion ratios worsened ( < 0.01) in IntnPP and LnPP groups in comparison to the control. The nPP conversion ratio improved ( < 0.01) from the control to the LnPP group. Fungal phytase reduced ( < 0.05) feed, CP, ME and nPP intake than the bacterial one. IntnPP and LnPP diets had a lower digestibility of CP ( < 0.01) and CF ( = 0.01) than the control. IntnPP and LnPP groups showed a higher ( < 0.05) economic efficiency than the control. Blood total protein was the lowest ( < 0.05) in the LnPP group, the control group showed the lowest ( < 0.05) level of albumin and IntnPP group had the lowest ( < 0.01) globulin level. The use of bacterial phytase increased ( < 0.01) total protein and globulin and decreased ( < 0.05) the plasma cholesterol in comparison to fungal phytase. Decreasing nPP levels in colored slow-growing broilers diet negatively affects growth performance and the use of phytase can partly alleviate these negative effects, but the efficiency of different enzyme sources (bacterial or fungal) was tied to the dietary nPP levels.
总共420只1日龄雏鸡被分为七组（每组12只雏鸡，共5个重复），饲喂等蛋白和等能量日粮。对照组在雏鸡期（1 - 35日龄）、生长期（37 - 56日龄）和育肥期（57 - 64日龄）分别饲喂含0.50%、0.45%和0.40%非植酸磷（nPP）的日粮。三个中等nPP（IntnPP）组根据生长阶段分别饲喂含0.40%、0.35%和0.30% nPP的日粮，并接受三种日粮处理：不添加；添加500 FTU/kg日粮的植酸酶（IntnPP_fp）和添加500 FTU/kg日粮的植酸酶（IntnPP_bp）。三个低nPP组饲喂含0.30%、0.25%和0.20% nPP的日粮，并接受与IntnPP相同的日粮处理，以获得LnPP、LnPP_fp和LnPP_bp组。IntnPP和LnPP组的体重增加、采食量、粗蛋白（CP）和代谢能（ME）摄入量均低于对照组（P<0.05）。IntnPP组的饲料转化率比LnPP组更有利（P<0.01）。与对照组相比，IntnPP和LnPP组的CP和ME转化率变差（P<0.01）。从对照组到LnPP组，nPP转化率提高（P<0.01）。真菌植酸酶比细菌植酸酶降低了（P<0.05）采食量、CP、ME和nPP摄入量。IntnPP和LnPP日粮的CP消化率（P<0.01）和CF消化率（P = 0.01）低于对照组。IntnPP和LnPP组的经济效益高于对照组（P<0.05）。LnPP组的血液总蛋白最低（P<0.05），对照组的白蛋白水平最低（P<0.05），IntnPP组的球蛋白水平最低（P<0.01）。与真菌植酸酶相比，使用细菌植酸酶可提高（P<0.01）总蛋白和球蛋白水平，并降低（P<0.05）血浆胆固醇水平。在有色慢速生长肉鸡日粮中降低nPP水平会对生长性能产生负面影响，使用植酸酶可部分缓解这些负面影响，但不同酶源（细菌或真菌）的效率与日粮nPP水平有关。
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