共查询到18条相似文献，搜索用时 437 毫秒
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通过对西藏日喀则地区3科43种栽培牧草中的铁、锰、钼、铜、锌、硒、钴7种微量元素的测定,探究微量元素在不同科属牧草中的分布特征。结果表明,西藏日喀则地区栽培牧草中微量元素的分布存在一定的规律性。总体而言,铁含量最高,可达800μg/g;锌次之,最高接近200μg/g;硒含量最低,含量变幅为0.002~0.013μg/g。3科牧草中,禾本科牧草铁含量相对较低,锌、铜含量相对较高;藜科牧草锌、铜含量相对较低,铁、锰含量相对较高;豆科牧草多数微量元素含量相对居中;各科牧草中的铁、锌、铜含量均属较高水平,钴均属中等水平;锰、硒、钼在3科间含量水平不一致。 相似文献
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戈壁草原蒙古羊春季羔羊铜缺乏症的研究 《畜牧与饲料科学》2022,43(2):46-50
[目的] 确定内蒙古苏尼特左旗北部地区春季发生的戈壁草原蒙古羊羔羊发病、死亡现象的主要原因。[方法] 选取3户羔羊发病情况最为严重的牧户采样,每户各采集5只发病羔羊的血液样本、放牧草场的饮用水样本,以及羔羊所处环境中3种主要牧草（红砂、珍珠猪毛菜和盐爪爪）样本和土壤样本,同时采集当地种羊场15只相同品种健康羔羊的样本作为对照,测定上述样本中的10种矿物质元素（钙、磷、铁、锰、铜、锌、镁、钼、硒、钴）的含量。[结果] 发病羔羊血液中铜和镁的含量显著（P<0.05）低于同品种健康羔羊,钼的含量显著（P<0.05）高于同品种健康羔羊,其他矿物质元素的含量差异不显著（P>0.05）。发病羔羊所处环境中饮用水的镁和钙含量较高。发病羔羊所处环境中红砂的钼、铁、锰和硒含量均高于文献报道值,其他矿物质元素含量均处于正常范围;盐爪爪的钼、铁、锰、硒、镁和钴的含量高于文献报道值,其他矿物质元素含量均处于正常范围;珍珠猪毛菜、红砂和盐爪爪的铜钼比分别为15.96∶1、0.23∶1和2.34∶1。发病羔羊所处环境中土壤样本的铜、铁、锰、硒、钴含量均低于文献报道值,镁、钙和磷含量均高于文献报道值,钼和锌含量在正常范围内。[结论] 该地区戈壁草原蒙古羊羔羊发病、死亡的原因主要是放牧羊摄入铜不足、钼超标、铁和锰等矿物质元素摄入量过多,导致羔羊对铜的吸收发生障碍,最终引起继发性铜缺乏症。 相似文献
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青海省海南州土壤-牧草-家畜系统微量元素的季节性盈缺分析 总被引：2，自引：0，他引：2
于2004年4月、7月和10月采取实地采样和实验室分析相结合的方法对青海省海南州土壤、牧草和家畜系统,进行微量元素(铜、钼、锰、锌和硒)盈缺分析,表明该地区秋季牧草中铜浓度为3.77±2.15 mg/kg,冬春季绵羊被毛中铜浓度为1.94±0.35 mg/kg,低于健康绵羊被毛中铜浓度3.68±0.74 mg/kg;钼在土壤和血清中的含量较为充足,但被毛中钼的含量在三个季节分别为0.03mg/kg、0.05mg/kg和0.03mg/kg,均低于正常值(0.16mg/kg).锰和锌在土壤、牧草和畜体中含量均在正常范围内,表明该体系中锰和锌不缺乏.土壤硒含量为0.061mg/kg～0.120mg/kg,低于土壤缺硒的临界值(0.5mg/kg),属于缺硒区,冬春季、夏季和秋季牧草中硒处于一般缺乏状态(全年平均为0.03mg/kg),血清和被毛中硒的浓度均低于正常水平,也处于缺乏状态. 相似文献
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于2004年4月、7月和10月采取实地采样和实验室分析相结合的方法对青海省海南州土壤、牧草和家畜系统,进行微量元素(铜、钼、锰、锌和硒)盈缺分析,表明该地区秋季牧草中铜浓度为3.77±2.15 mg/kg,冬春季绵羊被毛中铜浓度为1.94±0.35mg/kg,低于健康绵羊被毛中铜浓度3.68±0.74mg/kg;钼在土壤和血清中的含量较为充足,但被毛中钼的含量在三个季节分别为0.03mg/kg、0.05mg/kg和0.03mg/kg,均低于正常值(0.16mg/kg)。锰和锌在土壤、牧草和畜体中含量均在正常范围内,表明该体系中锰和锌不缺乏。土壤硒含量为0.061mg/kg~0.120mg/kg,低于土壤缺硒的临界值(0.5mg/kg),属于缺硒区,冬春季、夏季和秋季牧草中硒处于一般缺乏状态(全年平均为0.03mg/kg),血清和被毛中硒的浓度均低于正常水平,也处于缺乏状态。 相似文献
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青海省海西地区土壤、牧草、流产绒山羊血清中六种微量元素含量的检测 总被引：1，自引：0，他引：1
通过对海西州部分地区土壤、牧草及流产绒山羊血清中铁、锰、钴、铜、锌和硒6种微量元素的检测与分析,结果表明,在土壤、牧草及流产绒山羊血清中的铁和锰含量偏高,分别为39678.93±13134.40μg/g和559.93±129.34μg/g;822.83+415.86μg/g和51.91±2.97μg/g以及39.03±... 相似文献
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目的：建立＂一针肥注射液＂中微量元素的含量测定方法。方法：采用火焰原子吸收分光光度法测定＂一针肥注射液＂中铁、锌、铜、硒、钴的含量。结果：铁、锌、铜、硒、钴的线性范围分别为0.053~0.385μg/mL、0.25~2.50μg/mL、0.5~8.0μg/mL、10.0~100.0ng/mL、5.0~50.0ng/mL,平均回收率分别为100.35%、99.95%、99.51%、98.49%、100.51%。结论：本法可以准确测定＂一针肥注射液＂中铁、锌、铜、硒、钴的含量,该法简便、快速、准确可靠。 相似文献
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貉"白鼻子"病是貉的一种新发疾病,多数学者认为其为营养代谢性疾病,发病可能和某些微量元素的缺乏有关,但现在没有得到证实.本研究在尝试建立用火焰原子吸收光谱法和荧光吸收光谱法测定貉血清、被毛中铜、锌、铁、硒的方法的基础上,测定了患"白鼻子"病貉及健康貉血清、被毛中铜、锌、铁、硒的含量."白鼻子"病貉血清铜、锌、铁、硒的含量分别为(592.78±110,37)μg/L、(2.019±0.177)mg/L、(28.410±2.826)mg/L、(166.771±38.661)ng/L,和正常貉相比((709.84±76.56)μg/L、(4.759±1.925)mg/L、(42.352±23.197)mg/L、(303.92±59.527)ng/L),其血清铜、锌、铁、硒含量降低且存在显著差异(P=0.002、P=0.00,P=0.0495、P=0.00)."白鼻子"病貉被毛铜、锌、铁、硒的含量分别为(17.66±3.61)μg/g、201.43μg/g、(227.59±143.279)μg/g、(797.429±384.43)ng/g,和正常貉相比((16.93±2.86)μg/g、(158.10±31.5)μg/g、(179.613±90.683)μg/g、(612.67±272.410)ng/g),其被毛锌、硒含量降低且存在显著差异(P=0.049 5,P=0.045),铜、铁含量降低但显著不差异(P=0.395,P=0.236).试验结果表明貉"白鼻子"病的发病和其铜、锌、铁、硒的代谢异常有关. 相似文献
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The concentrations of copper, zinc and molybdenum were measured in samples of cattle liver from 10 slaughter-houses in Norway. A total of 335 samples were analysed. A clear accumulation of copper with age was found, the average copper level in the younger animals (≦ 3 years, n = 194) being 30 µg Cu/g liver wet weight, and in the older ones (> 3 years, n = 141) 59 µg Gu/g. The range in the copper values found was considerable, though significant differences between some of the districts were recorded. Copper concentrations were classified as low (≦10 µg Gu/g) in 9.6 % of the samples. Zinc showed no accumulation with age, nor were there any differences in zinc levels found in animals from different districts, the average level being 32 µg Zn/g liver wet weight. The picture was the same for molybdenum, no differences between age groups or districts being found. The average level was 1.0 µg Mo/g liver. There was no significant correlation between levels of copper, zinc or molybdenum.The supply of copper and zinc to cattle in Norway seems close to sufficient, but copper- and zinc-fortified mineral supplementation of cattle feed is still to be recommended. There seems to be no need for molybdenum supplementation in cattle. 相似文献
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[目的]对内蒙古四子王旗荒漠草原土壤—牧草—放牧绵羊生态系统中的微量元素含量进行分析,研究不同季节放牧绵羊体内矿物质元素的盈亏状况,评定矿物质元素营养限制因子。[方法]选取6只体况良好的体重为（39.65±2.25）kg的放牧蒙古羊母羊作为试验羊,测定该地区牧草嫩草期（6月）、生长期（9月）和枯草期（11月）放牧绵羊的体重、采食量、排粪量和排尿量;检测牧草3个生长时期草原土壤、牧草以及放牧绵羊血清中的7种矿物质元素（铁、铜、锰、锌、硒、钼、钴）含量;借助采食量模型预测放牧绵羊在牧草不同生长时期的矿物质元素摄入量;利用代谢试验测定从粪、尿中排出的矿物质元素含量,计算放牧绵羊体内矿物质元素沉积量。[结果]放牧绵羊的体重和采食量在牧草3个生长时期之间差异均极显著（P<0.01）,枯草期排粪量极显著（P<0.01）高于嫩草期和生长期。草原土壤、牧草及绵羊血清中的铁元素含量在牧草不同生长时期之间差异均不显著（P>0.05）,铁元素含量均不存在缺乏情况。枯草期牧草的铜元素含量极显著（P<0.01）低于嫩草期和生长期,枯草期绵羊体内沉积的铜元素含量极显著（P<0.01）低于生长期,并出现了负沉积。草原土壤、牧草以及绵羊采食和体内沉积的锰、钼元素含量在牧草不同生长时期之间存在极显著（P<0.01）差异,但两种元素不存在缺乏情况。嫩草期绵羊血清中的锌元素含量显著（P<0.05）高于生长期和枯草期;草原土壤、牧草、绵羊体内沉积的锌元素含量在牧草不同生长时期之间虽无显著（P>0.05）差异,但存在缺锌的情况。草原土壤中的硒元素含量在牧草生长期最高,极显著（P<0.01）高于嫩草期和枯草期,嫩草期和生长期牧草中的硒元素含量低于正常水平下限,而枯草期牧草中未检测到硒元素;绵羊血清中硒元素的含量在牧草不同生长时期之间差异不显著（P>0.05）,但均处于正常水平的下限。草原土壤中的钴元素含量在牧草不同生长时期之间差异不显著（P>0.05）,但均低于标准值;枯草期和嫩草期绵羊体内沉积的钴元素含量极显著（P<0.01）低于生长期。[结论]建议在该地区全年以适当形式为放牧绵羊补锌和硒元素,冬季或春季可适当补饲含铜和钴的微量元素制剂。 相似文献
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The concentrations of copper, molybdenum and zinc were measured in the liver of normal grazing sheep and lambs from Eastern Norway, and in sheep dead of chronic copper poisoning. The following mean values were found: Normal sheep: 173 ± 130 μg Gu/g wet weight, 1.0 ±0.3 μg Mo/g, and 49 ± 10 μg Zn/g; lambs: 129 ± 59 μg Gu/g, 0.9 ± 0.3 μg Mo/g, and 46 ±9 μg Zn/g; sheep dead of copper poisoning: 429 ± 249 μg Gu/g, 0.4 ± 0.1 μg Mo/g, and 43 ± 2d μg Zn/g. Sheep with low liver copper (Gu < 10 μg/g) were also analyzed for molybdenum and zinc, with the following results: 1.0 ± 0.2 μg Mo/g, and 45 ± 8 μg Zn/g wet weight. The differences in liver copper between all the groups, and the differences in molybdenum concentrations between the normal sheep and the lambs and between the normal sheep and the poisoned sheep were significant (P < 0.001). No significant correlations between liver copper/liver molybdenum or liver copper/liver zinc were detected. 相似文献
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The concentrations of copper, zinc and molybdenum were measured in liver samples from 21 normal slaughter pigs (average age about 6 months) and in 36 sows (average age about 2 years). The following mean values were found: Slaughter pigs: 15 ± 8 µg Cu/g, 45 ± 7 μg Zm/g and 1.0 ± 0.2 μg Mo/g wet weight; sows: 46 ± 70 μg Cu/g, 70 ± 26 μg Zn/g and 1.3 ± 0.3 μg Mo/g wet weight. The concentrations of all 3 elements were significantly higher in the sows than in the young pigs. There was no correlation between the concentrations of copper, zinc or molybdenum. The recorded copper levels in the slaughter pigs were in accordance with the levels of non-supplemented pigs given in the literature. The soluble hepatic copper- and zinc-binding proteins were separated into 3 different fractions by gel filtration. With increasing copper and zinc levels in the liver, a higher relative amount of these elements were found in the low molecular weight fraction. 相似文献
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The concentrations of copper, zinc and molybdenum were measured in the liver of goats from western and south-eastern Norway. The mean copper concentrations in the liver of goats from these two districts were 23±19 µg Cu/g and 59±31 µg Cu/g wet weight, respectively. As for zinc and molybdenum, no difference was found between the two groups of animals. No correlations were detected between copper and zinc, zinc and molybdenum, or copper and molybdenum. The copper levels in Norwegian goat liver are considerably lower than in sheep liver, and the ranges are significantly more narrow. The concentrations of molybdenum in goat liver are at the same levels as in sheep and swine, while the levels of zinc are somewhat lower. 相似文献
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Trace elements in grass, cattle liver and sheep liver from districts surrounding Karatina, Kenya. II. Copper, molybdenum, zinc and sulphur 总被引：1，自引：0，他引：1
Thirty-one samples of pasture grass from districts surrounding Karatina, Kenya were analysed for contents of copper, molybdenum, zinc and sulphur. The following mean values and standard deviations were found: Copper: 8.2 +/- 5.0 mg/kg DM; molybdenum: 1.4 +/- 2.6 mg/kg DM; zinc: 33 +/- 10 mg/kg DM and sulphur: 0.17 +/- 0.06% DM. Mean value of the ratio between copper and molybdenum was 13 +/- 11. Samples of cattle liver (n = 96) and sheep liver (n = 93) were analysed for copper and zinc with the following results: Cattle liver: 21 +/- 16 mg Cu/kg WW and 37 +/- 11 mg Zn/kg WW. Sheep liver: 59 +/- 37 mg Cu/kg WW and 30 +/- 6.4 mg Zn/kg WW. It is concluded that subclinical copper deficiency may occur in cattle in the districts included in the investigation. The copper status of sheep seems to be adequate. The levels of zinc may indicate a marginal intake of this element in sheep. 相似文献
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Balance studies were carried out on four Suffolk-cross lambs which were fed a diet containing only 1.2 mg zinc/kg dry matter; zinc deficiency was induced within three weeks. After a period during which the deficiency was relieved by a pica, the zinc deficient state was re-established. Each sheep was then treated with a soluble glass bolus containing zinc, cobalt and selenium. The plasma zinc concentration of the sheep rapidly increased and was maintained for between six and 10 weeks. The bolus was able to supply the daily requirement of the sheep for zinc, with no detrimental effect on their copper status. 相似文献