Mineral status of Pangasius pangasius (Hamilton) fingerlings in relation to supplemental phytase: absorption, whole‐body and bone mineral content
Mineral status of Pangasius pangasius (Hamilton) fingerlings in relation to supplemental phytase: absorption, whole‐body and bone mineral content
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DOI：
10.1111/j.1365-2109.2004.01204.x
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发表时间：
2005-03
影响因子：
2
通讯作者：
D. Debnath;N. P. Sahu;A. K. Pal;K. K. Jain-K.;S. Yengkokpam;S. Mukherjee
中科院分区：
文献类型：
--
作者：
D. Debnath;N. P. Sahu;A. K. Pal;K. K. Jain-K.;S. Yengkokpam;S. Mukherjee
本试验旨在量化添加微生物植酸酶对巴沙鱼鱼种矿物质表观吸收、全体和骨含量的影响。配制7种同蛋白（35.67%）、等热量（3870 kcal kg(-1)）饲粮，植酸酶添加水平分别为0 （T1）、150 （T2）、250 （T3）、350 （T4）、500 （T5）、1000 （T6）和2000 (T7) FTU（植酸酶单位）kg（-1）。选取1.97 ~ 2.05 g的巴沙鱼鱼种315尾，随机分为7个处理，每个处理3个重复。植酸酶添加组组织蛋白质含量显著高于对照组（P<0.05）。植酸酶添加组对钙（Ca）、磷(P)、镁（Mg）、锰（Mn）、锌（Zn）、铁（Fe）、钾(K)、铜（Cu）、钴（Co）的表观吸收率显著（P<0.05）高于对照组。对照组（T1）粪便灰分和磷含量显著（P<0.05）高于植酸酶添加组。饲粮中添加抑制植酸酶的Mg和Mn显著提高了全鱼Ca、P、Zn、Fe、Cu和Co含量（P<0.05）。植酸酶添加组骨钙、磷、钾、铜、钴浓度显著（P<0.05）升高。当植酸酶添加量达到500 FTU kg（-1）时，随着植酸酶添加量的增加，骨灰量（40.77 ~ 44.85%）也随之增加。结果表明，最低剂量250 FTU植酸酶kg（-1）的饲料可提高巴沙鱼鱼种对矿物质的吸收和利用。
A 60-day feeding trial was conducted to quantify the effects of microbial phytase supplementation on apparent absorption, whole body and bone contents of minerals in Pangasius pangasius fingerlings. Seven isoprotein (35.67%) and isocaloric (3870 kcal kg(-1)) diets were prepared with graded levels of supplemental phytase at 0 (T1), 150 (T2), 250 (T3), 350 (T4), 500 (T5), 1000 (T6) and 2000 (T7) FTU (Phytase Units) kg(-1). Three hundred and fifteen fingerlings of P. pangasius (1.97-2.05 g) were randomly distributed in seven treatments with three replicates each. There was significant increase (P<0.05) in tissue protein content in phytase-supplemented groups compared with the control. Apparent absorptions of calcium (Ca), phosphorus (P), magnesium (Mg), manganese (Mn), zinc (Zn), iron (Fe), potassium (K), copper (Cu) and cobalt (Co) were significantly (P<0.05) higher in the phytase-supplemented groups than the control group. Faecal ash and P contents were significantly (P<0.05) higher in the control (T1) than the phytase-supplemented groups. Whole-body contents of Ca, P. Zn, Fe, Cu and Co were significantly (P<0.05) improved by the dietary supplementation of phytase-barring Mg and Mn. Concentrations of bone Ca, P, K, Cu and Co were significantly (P<0.05) higher in phytase-supplemented groups. Bone ash contents (40.77-44.85%) were increased concomitantly with the increased level of phytase inclusion upto 500 FTU kg(-1) diet. It was observed that a minimum dose of 250 FTU phytase kg(-1) diet improved the mineral absorption and utilization in P. pangasius fingerlings.