【作者】 李亚奎；

【导师】 王洪荣； 卢德勋；

【作者基本信息】 内蒙古农业大学 ， 动物营养与饲料科学， 2005， 硕士

【摘要】 以矿物质营养系统集成型检测技术为基础,采取现场调查、实地采样和实验室分析相结合的方法对内蒙古四子王旗地区不同季节土壤～牧草～绵羊“三位一体”生态环境中矿物质元素进行研究,同时借助饱和烷烃法测定试验绵羊的放牧采食量和所食每种牧草的比例,对该地区放牧绵羊矿物质营养限制因子进行了系统的研究,最后通过补饲效应试验对所测结果进行验证。结果表明:放牧绵羊夏秋冬三季利用饱和烷烃法测得采食量的结果分别为:绝对采食量分别为 1.52±0.04kg/d、1.60±0.05kg/d、1.13±0.10kg/d,相对采食量为:4.35%、3.86%和 2.65%。绝对采食量在秋季达到最高,但相对采食量随季节的推移呈递减趋势。不同季节土壤、牧草和畜体中矿物质元素的含量不同,从三季的整体水平来看,土壤中 S、Cu、Mn、Zn、Se 处于临界缺乏状态,其它元素处于正常水平。所测牧草中各种矿物质含量表明:P、Na、K、Se 为缺乏状态,S、Cu、Zn 为临界水平,Fe 处于过量状态,结合对该地区放牧绵羊被毛、血浆和脏器中矿物质含量的测定,以及对各种矿物质的进食量和消化率进行综合分析表明,内蒙古四子王旗地区处于低 P、低 Na、低 K、低 Se、高 Fe 的生态环境。同时 S、Cu 和 Zn 处于亚临床状态。在补饲效应试验中,补饲这些矿物质元素同时补饲精料组体重显著提高(P<0.01),而单独补饲矿物质元素组,体重没有显著变化,证明该地区放牧绵羊营养限制因子中矿物质只是其中一部分,还广泛的存在能量和蛋白的缺乏。更多还原

【Abstract】 The trial was made to study the minerals of soil- pasture -sheep of different season in Siziwangqi of Inner Mongolia by the methods of the spot investigation, sampling practically and lab analysis on the basis of the systematically detective technique of mineral nutrition, the daily feed intake of the sheep and the percent of pasture were measured by saturated-alkane,the limiting mineral nutrition factors were studied systematically. Finally, the result was confirmed by supplemental effect trial. The results showed as follows: the daily feed intake of the sheep measured by saturated-alkane in summer, autumn and winter were: 1.52 ± 0.04kg/d,1.60 ± 0.05kg/d,1.13 ±0.10kg/d for the absolute intake, 4.35%, 3.86% and 2.65% for the relative intake respectively. The absolute intake was the highest in autumn, but the relative intake decreased with the season processing. The contents of minerals in soil, grass and animal varied in different season, from the general level, the soil is lack of S, Cu, Mn, Zn, Se critically and other minerals is normal. The pasture is lack of P, Na, K, Se, lack of S, Cu, Zn critically, and rich in Fe. The result showed that Siziwangqi of Inner Mongolia is under the entironment of low P, Na, K, Se, high Fe, sub-clinic S, Cu, Zn by the comprehensive analysis of the contents of minerals in the hair, serum, visceral organ of the grazing sheep and the intake, digestibility of minerals. In supplemental trial, the weight of the sheep which were supplemented minerals and concentrate increased significantly﹙P﹤0.01﹚, however that of the treat group which was supplemented only minerals was not significant, it shows that mineral is only a part of the limiting mineral nutrition factors for the grazing sheep in this region, it is still lack of energy and protein widely.更多还原