酉阳县土地利用现状及其潜力研究

土地利用现状资料是编制土地利用总体规划的可靠依据，为正确的领导决策提供了可靠的信息资源。本文在对酉阳县土地利用现状数据变化全面分析的基础上，指出了该县现有土地利用现状存在的问题和矛盾，并以此对酉阳县土地利用的发展趋势进行了科学的预测，为后期的规划修编工作提供了可靠的数据基础，具有一定的应用价值。     

试析用科学发展观指导水能资源的科学利用

水资源是人们赖以生存的资源，其不但可以给人们提供生活用水，还可以利用水能资源进行发电，从而保证水电站的稳定运行。随着社会的不断发展，我国水资源出现了紧缺的现状，由于水资源属于不可再生的资源，所以，一定要科学合理的利用水资源，还要避免出现资源浪费等问题，实现水资源利用的最大化。本文对科学发展观指导水能资源的科学利用进行了分析，希望对相关工作者提供一定帮助，加强对水能资源的开发与利用，实现可持续发展。     

内蒙古开鲁县天然草原利用现状及对策

内蒙古开鲁县地处农牧交错带，由于该地区的天然草原利用状况较不合理，因此，对内蒙古开鲁县天然草原利用现状进行了分析，并提出了合理利用天然草原的对策与建议。     

门源县草地利用现状及可持续利用措施

从草地资源的特点、利用与生产现状等方面进行了总结，分析了存在的主要问题，并提出了可持续利用的措施和对策，对因地制宜地开发和利用草地自然资源，促进当地畜牧业生产的持续、稳定发展。     

扎兰屯市天然草地现状及合理利用

本文对扎兰屯市天然草地利用现状进行了详细分析，根据利用情况将其划分为草地超载退化区，畜草基本平衡区，少畜富草区，对不同草地的利用提出了具体措施。     

猪栏舍的合理利用

猪栏舍的设计建造，构成了猪场的最大固定投资成本。因此，对猪栏舍的合理利用，是确保养猪经济效益的前提。刘继军等对猪场的生产工艺流程进行了划分，陈国宇则对各类猪栏数的计算进行了介绍。本文根据养猪生产工艺流程的不同提出了各类猪栏数的确定方法，并在此基础上对现有猪舍的合理利用进行研究，旨在合理而充分地利用各类猪舍，使养猪的效益达到最优化。     

城市土地优化配置与集约利用评价模型剖析

采用综合分析法和文献综述法，对城市土地优化配置和集约利用的内涵进行了解释，归纳总结了用于城市土地优化配置与集约利用评价模型，以期在城市土地优化配置与集约利用中得到应用，并逐步改进。     

奶牛日粮淀粉的消化吸收位点对其利用的影响

本文综述了奶牛日粮淀粉的消化吸收位点对其利用影响的研究进展，重点介绍了日粮淀粉在奶牛瘤胃、小肠中的消化吸收，日粮淀粉的转化利用及淀粉消化位点对淀粉利用的影响。     

张掖市养殖业废弃物无害化利用现状分析及建议

近年来，张掖市积极探索养殖业废弃物无害化利用方式，取得了一定的成效。本文通过对废弃物治无害化利用现状的分析，提出了的相关建议。     

对我国家禽遗传资源保存和利用的几点建议

本文在当前经济、文化背景下，对我国家禽遗传资源保存和利用的状况，进行了分析，从优化家禽保护方向，合理利用地方家禽品种资源及充分借助现代生物学技术等方面提出了对我国家禽遗传资源进行合理保存与利用的建议。     

牦牛放牧率对小嵩草高寒草甸不同植物类群地上生物量生产率的影响

2年的牦牛放牧试验表明:除不同植物本身的生理特性外,降水和地温是影响小嵩草高寒草甸两季草场不同植物类群地上生物量绝对生长率的关键因素。小嵩草高寒草甸两季草场地上总生物量的绝对生长率1999年在7月份最大;1998年,冷季草场各放牧处理的绝对生长率在8月份达到最大,暖季草场的对照组和轻牧组在7月份最大,中牧组和重牧组在8月份最大。不同植物类群地上生物量生长率的变化不尽相同。1998年,冷季草场禾草和莎草地上生物量的绝对生长率8月份达到最大,暖季草场禾草和莎草地上生物量的绝对生长率7月份达到最大,且9月份出现了营养的再次积累;1999年,冷季草场禾草地上生物量的绝对生长率在6月份和8月份出现了两个峰值,暖季草场禾草地生物量的绝对生长率在7月份达到最大。对杂草类而言,1998年冷季草场的绝对生长率6月份最大,暖季草场重牧组的绝对生长率8月份达到最大,其他各处理7月份达到最大;1999年重牧组杂草的绝对生长率在6月份达到最大,其他各处理杂草在8月份达到最大。     

短花针茅荒漠草地放牧系统微量元素季节变化及盈缺分析

为更有效地防治内蒙古自治区四子王旗地区家畜微量元素代谢病,合理使用微量元素添加剂,采用实地采样和实验室分析相结合的方法,对该地区短花针茅（Stipa breviflora）荒漠草地土壤-牧草-家畜生态系统中微量元素的水平进行检测。结果显示,土壤中铜和硒处于缺乏状态。牧草中铁和锰元素处于过量状态,硒为缺乏状态。与健康绵羊的各项指标相比较,血浆中铁和锰分别于夏秋季节和全年高于正常水平,硒和铜元素分别于秋季和冬季低于正常水平;肝脏中铁和锰全年高于正常水平,铜冬季低于临界值,硒元素秋冬季节低于正常水平;被毛中铁全年高于正常水平,而铜和硒全年低于正常水平。结合放牧绵羊对各种矿物质的进食量和消化率进行综合分析表明,该地区为高铁、高锰、低硒的生态环境,同时铜和锌处于季节性缺乏状态。     

Effects of intravenously administered tetra-thiomolybdate on the distribution of copper in the liver and kidney of copper loaded sheep: a histochemical study

The effects of intravenously administered thiomolybdate on the liver and kidney of copper loaded sheep were studied using 16 ewes in three groups. Copper, iron and molybdenum concentrations were determined by spectrophotometry and the distribution of copper in the liver and kidney was studied histochemically. Following thiomolybdate administration, the concentration of copper in the liver was reduced, that of molybdenum increased and the concentration of copper and molybdenum in the kidney increased. The reduction of copper concentration in the liver was associated with reductions in the number and size of granules in hepatocytes which stained positively for copper and in the number of Kupffer cells containing positively staining granules. The decrease in the amount of copper in hepatocytes appeared to be greater than that in Kupffer cells. This effect was greatest in the centrilobular zones and least in the periportal zones. The increased concentration of copper and molybdenum in kidney was associated with an increase in the number and size of granules staining positively for copper in the epithelial cells of the proximal convoluted tubules which suggested an uptake of copper-molybdenum complexes by the lysosomes of these cells.     

Campylobacter spp in human,chickens, pigs and their antimicrobial resistance

Campylobacter spp. have been identified as etiologic agents in outbreaks and sporadic cases of gastroenteritis in developed countries. In developing countries, most reported Campylobacter infections are in children. Previously reported prevalences of Campylobacter spp. in children in Southeast Asia range from 2.9% to 15%. The frequency and pattern of occurrence of Campylobacter spp. differ between developed and developing countries, especially in the number of cases reported in adults and the presence of any seasonal patterns in occurrence. Although the severity of Campylobacter infection in adults was different between developed and developing countries, the clinical symptoms of infection in adults resulting from infection in developing countries was similar to those in developed countries. Many different animal species maintain Campylobacter spp. with no clinical signs. There do not appear to be significantly different colonization rates of Campylobacter in food animals between developed and developing countries. The role of C. jejuni as a primary pathogen in farm animals is uncertain. C. jejuni can be found in feces of diarrheic and healthy calves and piglets. Campylobacter with resistance to antimicrobial agents have been reported in both developed and developing countries, and the situation seems to deteriorate more rapidly in developing countries, where there is widespread and uncontrolled use of antibiotics resistance was observed at high levels in food animals in both developed and developing countries. Studies suggested an association between antimicrobial use in food animals and the development of resistance in human isolates in developed countries.     

中国野生动物驯养与繁殖法律制度的缺陷与完善

野生动物驯养繁殖在世界野生动物资源保护中具有重要作用，有关野生动物驯养繁殖的法律制度也成为各国野生动物资源保护立法的主要内容。本文针对目前中国野生动物驯养繁殖的立法现状与存在问题，提出完善中国野生动物驯养繁殖的国内法对策，以推进中国野生动物资源保护立法的发展。     

奶牛发情周期中毛 唾液和乳汁孕酮水平的变化

本实验采用放射免疫分析法(RIA)测定了11头奶牛一个发情周期里毛、唾液、乳汁中孕酮(P_4)含量。经产牛(n=8)的毛和唾液中P_4水平变化与乳汁中P_4水平变化一致。青年牛(n=3)的毛和睡液中的P_4水平变化一致,并分别与经产牛毛和唾液中P_4水平变化一致。7头配种后的经产牛和5头配种后的青年牛分别取20和23天的样品进行妊娠诊断,与配种后60天的直检结果相对照,依据经产牛毛、乳P_4水平进行妊娠诊断的阳性准确率分别是85.7％(6/7)和100％(7/7),依据青年牛毛P_4水平进行妊娠诊断的阳性准确率为100％(5/5)。     

郁南沙糖桔果园土壤营养状况及结果树叶片营养动态变化

对广东郁南7个代表性沙糖桔果园土壤和结果树植株叶片营养状况进行了分析。结果显示，坡地果园的酸度比水田果园的大。土壤质地以粘土和粘壤土为主，其中砂页岩坡地果园土壤质均为粘土，而花岗岩坡地为粉砂质粘土，水田改种的多为壤土。土壤有机质含量总体处于中等偏低水平。全氮主要在中等至偏低水平之间；坡地果园的有效磷偏低，水田果园有效磷处于低量至适量水平；缺磷和缺钾的主要是坡地果园，而高磷和高钾的主要是水田果园。土壤交换性钙、镁和有效硼普遍缺乏；铜、锌个别缺乏；铁、锰、硫含量均较高。沙糖桔结果树周年营养状况随着生育期的不同而发生动态变化，土壤磷钾高的果园其叶片磷钾水平并不是全都相应提高。叶片N、P、K、Cu平均含量在开花期最高，N、K、Cu均处于柑桔类的适量范围，而P则高于适量范围；叶片N、P平均含量在幼果期最低。叶片Ca平均含量在果实成熟期最高，郁南沙糖桔叶片Mg低于柑桔类适量水平的较多，说明缺镁的情况较多；叶片Fe、Mn含量从开花期最低至成熟期达到最高，地下水位较高的果园叶片锰含量全年每个生育期均较高，在后期甚至超过适宜水平的1倍多。     

Numbers of dogs, cats, birds, and exotic animals in veterinary practices in the Netherlands 1994-2005 and possible consequences for the veterinary curriculum

The species of pets owned in the Netherlands are constantly changing, and it is important that veterinary practitioners have information about the number and species of pets presented in veterinary practice. Using the same methodology as in 1994, we determined the relative importance of the various pet species in 2005 and compared these data with those for 1994. The most notable findings were a 25% increase in the number of birds and exotic animals seen in small and large animal practices (from about 10% to about 12.5%), a doubling of the number of birds and tripling of the number of pigeons seen in mixed practices, a doubling of the number of reptiles seen in small animal practices, and a 10-fold increase in the number of fish seen in veterinary practices in general. There was a significant decrease in the proportion of cats (from 46% to 40.7%) and an increase in the proportion of dogs (from 44% to 46.7%). These trends in veterinary practice consultations did not parallel those seen in pet ownership. The increase in the number of birds (especially pigeons), reptiles, and fish seen in veterinary practice emphasizes the need to pay attention to these species in the standard companion animal curriculum.     

重庆三峡库区加工甜橙园土壤养分状况分析

为了解重庆三峡库区加工甜橙园土壤养分含量状况，在重庆7县（区）随机选取132个果园，分析背景土壤和农化土壤pH值、有机质和有效态矿质养分含量。结果显示，分别有56.8%和60.8%的果园背景土壤和农化土壤pH值适宜甜橙生长，农化土壤酸性土比例增加；背景土壤和农化土壤有机质含量不足（<15 mg?Kg-1）的比例分别为77.3%和85.3%，碱解氮处于适宜范围的比例分别为56.8%和61.5%，有效钙过剩（高量和过量）的比例分别为79.6%和76.7%；背景土壤有效磷、钾不足(缺乏和低量)的比例分别为95.4%和72.8%，有效锌、硼不足的比例分别为54.5%和70.5%；农化土壤有效磷、钾不足的比例分别为60.8%和57.6%，有效锌、硼不足比例分别为65.9%和90.7%。背景土壤和农化土壤有效镁、铁、锰及铜不足和过量并存。总体而言，土壤养分状况中等偏差；与背景土壤相比，农化土壤pH值、有机质、有效钙、锌和硼含量下降且缺锌严重，其它养分含量则有所上升。     

The concentration of ascorbic acid in different tissues of calf fetuses in 3 different development stages]

The concentration of ascorbic acid in the cerebrum and in the brain stem of bovine fetuses decreased with increasing body weight; in the cerebellum there was no change. The decrease of the concentration in the lungs, in the heart, in the kidneys, in the M. longissimus and in the M. semimembranosus in the course of the fetal growth was different. In the liver and in the adrenals the concentration in the 3 groups of fetuses with a body weight of 4.18 +/- 2.01, of 9.72 +/- 0.97 and of 17.12 +/- 2.61 kg was similar. The highest concentrations were found in the adrenals, in the testes and in the cerebrum. The functional significance of the changes in the concentration in the tissues of the bovine fetuses is discussed and compared with the results in human fetuses and in adult cattle.