高山细毛羊矿质元素及营养物质代谢对食土的响应

发布时间：2018-06-01 23:10

本文选题：食土 + 矿质元素　；参考：《兰州大学》2015年硕士论文

【摘要】：试验以青藏高原东北缘天祝县乌鞘岭的甘肃高山细毛羊为研究对象,在舍饲条件下系统研究了食土对青藏高原放牧家畜瘤胃代谢、养分平衡及血清、脏器矿质营养水平影响。试验选取8只18月龄的去势甘肃高山细毛羊,随机分为对照组和食土组。对照组每只羊每天1000g燕麦青干草,食土组每只羊每天饲喂1000g燕麦青干草+100g土壤。试验结果表明：1、瘤胃液pH、总挥发性脂肪酸(TVFA)、乙酸、丙酸、乙丙比均不受食土影响(P0.05)；瘤胃异丁酸的含量受食土影响显著(P0.05),2、食土显著提高了粗蛋白消化率、显著降低了尿氮和粪氮的排出量(P0.05)。但粗灰分、中性和酸性洗涤纤维消化率不受食土影响(P0.05)。3、食土显著提高了血清Ca(对照组vs食土组=132.50 vs 143.90mg/L)、 Fe(4.44 vs 5.83mg/L)、Mn(0.19 vs 0.25mg/L)浓度(P0.05),显著降低了血清Cu(1.54 vs 1.40mg/L)、Zn(3.92 vs 2.32mg/L)浓度(P0.05),血清Mg和P浓度不受影响(P0.05)。4、脏器矿质营养水平受食土影响显著(P0.05)。食土显著提高了心脏Ca(13.3 vs 42.8mg/kg)浓度(P0.05),肝脏Ca(3.7 vs 44.3mg/kg)、Mn(3.2 vs 8.7mg/kg)、Zn(51.6 vs 79.5mg/kg)浓度(P0.05),脾脏Ca(17.0 vs 83.5mg/kg)、 Cu(4.6 vs 14.6mg/kg)、Zn(33.8 vs 51.7mg/kg)浓度(P0.05),肺脏Ca(38.7 vs 155.0mg/kg)和Zn(43.9vs 63.4mg/kg)浓度(P0.001),肾脏Ca(57.4 vs 108.0mg/kg)浓度(P0.05)；食土极显著降低了心脏P(11450.3 vs 4178.9mg/kg)浓度(P0.001),肝脏P(6203.5 vs 4343.7mg/kg)浓度(P0.05),脾脏P(10919.7 vs 7865.9mg/kg;和Mn(6.8 vs 3.1 mg/kg)浓度(P0.05),肺脏P(10661.4 vs 7482.2mg/kg;)和Fe(463.7 vs 275.0mg/kg)浓度(P0.05),肾脏P(10221.9 vs 5908.7mg/kg)和Fe(216.3 vs 131.0mg/kg)浓度(P0.05)。
[Abstract]:Using Gansu alpine fine wool sheep in Wushaoling, Tianzhu County, northeast margin of Qinghai-Xizang Plateau as the research object, the effects of feeding soil on rumen metabolism, nutrient balance, serum and mineral nutrient level in organs of grazing livestock in Qinghai-Tibet Plateau were studied systematically. Eight 18 month old Gansu alpine fine wool sheep were randomly divided into control group and soil eating group. The control group was fed 1000 g oat green hay per day, and the soil feeding group was fed 1000 g oat green hay 100 g soil per day. The results showed that the pH of rumen fluid, total volatile fatty acid (TVB), acetic acid, propionic acid, ethylene-propyl acid ratio were not affected by the edible soil, and the content of rumen isobutyric acid was significantly affected by the edible soil, and the digestibility of crude protein was increased significantly. The excretion of urine nitrogen and fecal nitrogen was significantly decreased (P 0.05). But the crude ash, The digestibility of neutral and acidic detergent fibers was not affected by the dietary soil. The digestibility of neutral and acidic detergent fibers increased significantly (control group vs soil-eating group 132.50 vs 143.90 mg 路L ~ (-1) L ~ (-1), Fe(4.44 = 5.83 mg / L ~ (0.19) vs 0.25 mg 路L ~ (-1), serum Cu(1.54 vs 1.40 mg 路L ~ (-1) Zn ~ (3 +) = 2.32 mg 路L ~ (-1) (P < 0.05). The mineral nutrition level of viscera was significantly affected by the soil. 椋熷湡鏄捐憲鎻愰珮浜嗗績鑴廋a(13.3 vs 42.8mg/kg)娴撳害(P0.05),鑲濊剰Ca(3.7 vs 44.3mg/kg),Mn(3.2 vs 8.7mg/kg),Zn(51.6 vs 79.5mg/kg)娴撳害(P0.05),鑴捐剰Ca(17.0 vs 83.5mg/kg), Cu(4.6 vs 14.6mg/kg),Zn(33.8 vs 51.7mg/kg)娴撳害(P0.05),鑲鸿剰Ca(38.7 vs 155.0mg/kg)鍜孼n(43.9vs 63.4mg/kg)娴撳害(P0.001),鑲捐剰Ca(57.4 vs 108.0mg/kg)娴撳害(P0.05);椋熷湡鏋佹樉钁楅檷浣庝簡蹇冭剰P(11450.3 Mn(6.8 vs 3.1 mg / kg), lung P10661.4 vs 7482.2 mg / kg), Fe(463.7 vs 275.0 mg / kg), kidney P10221.9 vs 4343.7 mg / kg), kidney P10221.9 vs 5908.7 mg / kg) and Fe(216.3 vs 131.0 mg / kg).
【学位授予单位】：兰州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S826

【共引文献】