Rupić V, Ivandija L, Luterotti S, Dominis-Kramarić M, Bozac R
Faculty of Agriculture, University of Zagreb, Croatia.
Acta Vet Hung. 1998;46(1):111-26.
The effect of varying amounts of sources of dietary zinc on some blood parameters and the plasma protein ratios of fattening pigs was studied. During a 30-day pre-trial period, 42 pigs were depleted of Zn and divided into three groups of 14 animals each. During the 105-day experimental fattening period two experimental groups (T1-2) were repleted with dietary Zn in the form of inorganic salt (ZnSO4) or metallo-organic chelate (zinc methionate, ZnMET), while the control group (C) received no extra Zn. The supplements contained 84.3 and 40.9 mg Zn/kg diet, respectively. The nutritional effects of Zn were evaluated on the basis of red blood cell (RBC) count, mean corpuscular volume (MCV), haemoglobin (Hb) concentration, packed cell volume (PCV), white blood cell (WBC) and thrombocyte count, plasma total protein, albumin, and globulin concentrations, and albumin/globulin (A/G) ratio. During the parakeratosis period (days 28-56) both the basic feed (group C) and the diet enriched with 40.9 mg Zn/kg (as ZnMET) fed to group T2 pigs resulted in a lower red blood cell (RBC) count, Hb concentration and PCV than in group T1 fed a diet containing 84.3 mg Zn/kg (as ZnSO4). Dietary Zn of organic and inorganic origin had no effect on MCV and on the WBC and thrombocyte counts of fattening pigs. At the start of the parakeratosis period (day 28), group C pigs had significantly lower, and by its end (day 56) significantly higher plasma total protein and globulin concentrations than pigs of group T1. At the same time, no significant differences were observed in albumin concentration between group C and the two experimental groups. Throughout the trial, feed containing sufficient, and insufficient, quantities of Zn from various sources had no influence on blood plasma alpha and beta globulin concentrations. In the second part of the experiment (day 56) dietary Zn deficiency resulted in a significantly higher level of gamma globulin in group C pigs than in pigs given sufficient Zn of inorganic origin. While inorganic Zn increased some of the blood parameters, namely RBC count, Hb and possibly PCV, organic Zn seemed to be responsible for raising the proportion of plasma globulins.
研究了不同膳食锌源添加量对育肥猪某些血液参数及血浆蛋白比例的影响。在为期30天的预试验期内，42头猪被耗尽锌，并分为三组，每组14头。在为期105天的实验育肥期内，两个实验组（T1 - 2）分别以无机盐（硫酸锌，ZnSO4）或金属有机螯合物（蛋氨酸锌，ZnMET）的形式补充膳食锌，而对照组（C）不额外补充锌。补充剂中分别含有84.3和40.9 mg锌/千克日粮。基于红细胞（RBC）计数、平均红细胞体积（MCV）、血红蛋白（Hb）浓度、红细胞压积（PCV）、白细胞（WBC）和血小板计数、血浆总蛋白、白蛋白、球蛋白浓度以及白蛋白/球蛋白（A/G）比值来评估锌的营养效果。在角化不全期（第28 - 56天），基础日粮组（C组）以及给T2组猪饲喂的含40.9 mg锌/千克（以ZnMET形式）的日粮，其红细胞（RBC）计数、Hb浓度和PCV均低于给T1组猪饲喂的含84.3 mg锌/千克（以ZnSO4形式）的日粮。有机和无机来源的膳食锌对育肥猪的MCV以及WBC和血小板计数没有影响。在角化不全期开始时（第28天），C组猪的血浆总蛋白和球蛋白浓度显著低于T1组猪，而在该期结束时（第56天）则显著高于T1组猪。同时，C组与两个实验组之间的白蛋白浓度未观察到显著差异。在整个试验过程中，来自各种来源的含充足和不足量锌的饲料对血浆α和β球蛋白浓度没有影响。在实验的第二部分（第56天），膳食锌缺乏导致C组猪的γ球蛋白水平显著高于给予充足无机来源锌的猪。虽然无机锌提高了一些血液参数，即RBC计数、Hb以及可能还有PCV，但有机锌似乎负责提高血浆球蛋白的比例。
