日粮中高剂量植酸酶对肉鸡生长性能、骨骼矿化和钙磷沉积的影响

发布时间：2018-09-14 08:04

【摘要】：试验旨在研究含25-羟基维生素D3(25-OH-D3)低磷日粮中添加高剂量植酸酶对1~42日龄肉鸡生长性能、骨骼矿化和钙磷沉积率的影响。将250只1日龄肉鸡公雏随机分成5个处理,每个处理5个重复,每重复10只。1个对照组:非植酸磷(NPP)含量为0.45%/0.35%;4个试验组按照2×2因子设计试验:2个NPP含量(1~21日龄,NPP含量分别为0.35%和0.25%;22~42日龄,NPP含量分别为0.25%和0.15%),植酸酶2个添加水平为1 000 IU/kg和10 000 IU/kg。结果显示:(1)与日粮中NPP含量0.35%/0.25%相比,NPP含量为0.25%/0.15%时,42日龄肉鸡体增重、血浆无机磷浓度、股骨和胫骨灰分重量、钙含量以及跖骨直径和磷含量显著降低(P0.05),31~34日龄肉鸡钙沉积率和11~14日龄肉鸡磷沉积率显著提高(P0.05)。(2)与日粮中植酸酶添加1 000 IU/kg相比,植酸酶添加10 000 IU/kg时,42日龄肉鸡体增重、采食量、血浆无机磷浓度、股骨重量和灰分重量、胫骨和跖骨长度显著提高(P0.05),11~14日龄肉鸡钙磷沉积率显著提高(P0.05)。(3)与日粮中NPP含量0.45%/0.35%相比,日粮中0.35%/0.25%NPP+1 000 IU/kg植酸酶或0.25%/0.15%NPP+10 000 IU/kg植酸酶时,肉鸡生长性能和骨骼矿化(除跖骨磷含量外)未受到显著影响(P0.05)。综上所述,1~42日龄肉鸡日粮中NPP含量为0.35%/0.25%时,植酸酶适宜添加量为1 000 IU/kg;NPP含量为0.25%/0.15%时,植酸酶适宜添加量为10 000 IU/kg。
[Abstract]:The aim of this study was to study the effects of high dose phytase supplementation on growth performance, bone mineralization and calcium and phosphorus deposition in diet containing 25 hydroxyvitamin D 3 (25-OH-D3). 250 1-day-old male broilers were randomly divided into 5 treatments with 5 replicates in each treatment. One control group: the content of non-phytate (NPP) was 0.45% / 0.35; the 4 test groups were designed according to 2 脳 2 factor: 2 NPP content (0.35% and 0.25% in 21 days old, 0.25% and 0.15% respectively), and 2 levels of phytase were added. 1 000 IU/kg and 10 000 IU/kg. The results showed that: (1) compared with 0.35 / 0.25% of dietary NPP, the weight gain, plasma inorganic phosphorus concentration, weight of femur and tibia ash of 42-day-old broiler chickens were 0.25% and 0.15%, respectively. Calcium content, metatarsal diameter and phosphorus content decreased significantly (P0.05), calcium deposition rate of 31d 34-day-old broilers and phosphorus deposition rate of 110-14-day-old broilers increased significantly (P0.05). (2), compared with that of dietary phytase supplemented with 1 000 IU/kg, phytase supplementation of 10 000 IU/kg increased weight of broiler chickens at 42 days old. Feed intake, plasma inorganic phosphorus concentration, weight of femur and ash, length of tibia and metatarsal bone were significantly increased (P0.05). Calcium and phosphorus deposition rate (P05 / 3) of 110-14 day-old broilers was significantly higher than that of dietary NPP content of 0.45% / 0.35%. Dietary 0.35%/0.25%NPP 1 000 IU/kg phytase or 0.25%/0.15%NPP 10 000 IU/kg phytase did not significantly affect growth performance and bone mineralization (except metatarsal phosphorus content) of broilers (P0.05). In conclusion, when the content of NPP in diet is 0.35% / 0.25%, the appropriate dosage of phytase is 1 000 IU/kg;NPP / 0.15%, the optimum dosage of phytase is 10 000 IU/kg..
【作者单位】：商丘师范学院生命科学学院;河南农业大学牧医工程学院;河南正本清源科技发展股份有限公司;
【基金】：国家自然科学基金项目[31101732] 河南省教育厅项目[16A230003]
【分类号】：S831.5

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