四川省亚热带湿润气候区紫花苜蓿的生产特点

分析了四川亚热带湿润区的气候,土壤和地形特征,指出了紫花苜蓿在这一地区的主要受限因素,并提出在四川湿润地区推广种植紫花苜蓿要注重抗湿、抗热、耐酸品种的选育,同时要提高田间管理水平。在紫花苜蓿的利用上,要以饲草利用为基础,采用菜用、蜜用相结合的方式,提高经济收益,以解决紫花苜蓿在南方地区生产,管理和运输成本高的问题,扩大紫花苜蓿在四川的种植规模。     

不同秋眠级紫花苜蓿在贵州地区的引种试验

为了解紫花苜蓿在贵州省不同地区的适应性,分别对WL系列7个秋眠级的紫花苜蓿在贵州3个地区的株高、产量及干鲜比等指标进行了品比试验。结果表明:参试7个紫花苜蓿品种第1次刈割时的株高、干草产量最高,第2、3次刈割时逐渐降低。不同茬次间紫花苜蓿干鲜比存在差异,随着刈割次数的增加,干鲜比逐渐升高,但品种间差异性不显著。不同品种间紫花苜蓿株高及干草产量也存在显著性差异;初花期WL712、WL656植株的平均高度最高,但WL712的干草产量较低。贵阳麦坪地区适宜种植的品种有WL440和WL354;独山地区适宜种植的品种有WL440和WL525;威宁地区适宜种植的品种有WL440和WL366。     

10个紫花苜蓿品种的生产性能及抗性分析研究

研究了10个紫花苜蓿品种在昆明地区的主要生产性能及抗逆性。结果表明:GT13R紫花苜蓿、射手2号紫花苜蓿和路宝紫花苜蓿在生产性能、营养价值和抗性方面都优于其他供试品种,适宜在昆明地区大面积推广种植。     

10个紫花苜蓿品种的生产性能及抗性分析研究

研究了10个紫花苜蓿品种在昆明地区的主要生产性能及抗逆性.结果表明GT13R紫花苜蓿、射手2号紫花苜蓿和路宝紫花苜蓿在生产性能、营养价值和抗性方面都优于其他供试品种,适宜在昆明地区大面积推广种植.     

旱作条件下紫花苜蓿3个品种生产性能试验

研究了干旱寒冷地区3个紫花苜蓿品种在旱作条件下的生长发育及生产性能。结果表明,3个紫花苜蓿品种均能正常生长发育,生产性能良好,可以进行推广种植。     

旱作条件下紫花苜蓿3个品种生产性能试验

研究了干旱寒冷地区3个紫花苜蓿品种在旱作条件下的生长发育及生产性能。结果表明，3个紫花苜蓿品种均能正常生长发育，生产性能良好，可以进行推广种植。     

宁南山区12个紫花苜蓿品种营养价值的比较研究

为筛选出适宜宁夏南部山区种植的高产优质紫花苜蓿品种,以宁夏当地紫花苜蓿品种——固原紫花为对照,对引进的11个紫花苜蓿品种进行了营养成分分析及产草量的比较研究。结果表明,中苜1号、甘农3号产量高,品质较优,适宜在该地区大面积推广和种植。     

紫花苜蓿分枝初期植株性状的调查分析

本文拟探讨凉山地区种植的盛世紫花苜蓿的生长特点和性状表现,对其分枝初期进行抽样调查,为其推广种植提供技术依据。     

庆阳市紫花苜蓿和燕麦推广利用现状

文章对紫花苜蓿、燕麦在庆阳市引进及在当地推广情况做了说明,结合试验对国内、国外筛选品种做了对比,推荐了适宜在庆阳市南部、北部地区种植的紫花苜蓿品种;同时对不同播期的燕麦产量做了比较,分析了燕麦不同部位营养成分。     

南方耐铝毒紫花苜蓿遗传育种研究进展

紫花苜蓿为全世界所推广的优质牧草。在我国北方大部分地区已广泛种植，但其产量已远远不能满足市场需求。因此，挖掘南方种植紫花苜蓿的生产潜力成为必然趋势。目前，南方土壤中的铝毒是妨碍其高产的重要原因。本文通过近年来国内外铝毒对作物的影响以及紫花苜蓿耐铝毒育种研究进行评述，为今后培育出耐铝毒、高产量的南方紫花苜蓿新品种以及加快我国畜牧业发展提供指导。     

商会自治的基石——商会自治规范研究

在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。     

癸氧喹酯干混悬剂含量测定的改进

采用高效液相色谱法测定癸氧喹酯干混悬剂的含量,在2-250μg/mL范围内,峰面积的常用对数与进样量浓度的常用对数呈良好的线性关系,R^2=1(n=5),平均回收率为99.24%~99.51%,RSD在0.05%~0.28%。此方法分析时间短,样品前处理简便、定量结果准确,重现性好,结果满意,为其质量控制提供了依据。     

猪毛色遗传的研究进展

本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。     

Comparison of 2 methods of centesis of the bursa of the biceps brachii tendon of horses

REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air.     

不同样本商品蜂蜜中硒含量的测定

用硝酸和高氯酸消化蜂蜜,使硒游离出来,在微酸性环境下,硒和2,3-二氨基萘(DAN)生成有较强荧光的物质,用环己烷萃取,在激发波长378nm,荧光波长518nm处测定其荧光强度。蜂蜜中硒含量范围:0.10～0.82μg/g。表明:蜂蜜应视为天然富硒营养品。     

乳酸杆菌益生作用机制的研究进展

乳酸杆菌作为益生菌广泛用于人和动物。本文综述了乳酸杆菌改善宿主健康的机制。乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道。文章重点讨论了乳酸杆菌表面成分（表面蛋白、脂磷壁酸和肽聚糖）与肠道受体（Ｃ型凝集素受体、Ｔｏｌｌ样受体和 Ｎｏｄ样受体）,阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制。     

Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF

Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo.     

Mechanism of Action of Probiotic Function of Lactobacilli

乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制.     

中华人民共和国农业部公告 第267号

为贯彻落实《兽药生产质量管理规范》(简称《兽药GMP》),进一步推动兽药GMP实施进程,我部制定了《兽药生产质量管理规范检查验收办法》,现予公告。本公告自2003年6月1日起施行。附件:兽药生产质量管理规范检查验收办法二○○三年四月十日第一章 总则 第一条 为推动《兽药生产质量管理规范》(以下简称兽药GMP)的实施,规范兽药GMP检查验收工作,制定本办法。 第二条 农业部负责全国兽药GMP管理和检查验收工作;负责制修订兽药GMP检查验收管理规定;负责兽药GMP检查员队伍建设和监督管理工作,负责国际兽药贸易中GMP互认工作。 …