川西草原植物资源播娘蒿亚麻酸含量的研究

川西草原的十字花科植物资源比较丰富,如特用油料植物播娘蒿等。作者对川西草原所产播娘蒿及其近缘植物种子油中的亚麻酸含量作了研究,得到下列结果。在播娘蒿及其近缘高亚麻酸植物中,播娘蒿的亚麻酸含量约为37 01%,其适应力较强,引种后产量较高,有较好的利用前景。不同地区分布的播娘蒿群体中,川西草原产播娘蒿的亚麻酸含量较高,引种后生育较正常,种子产量较好,有较好的利用价值。进一步的测试表明,播娘蒿的亚麻酸主要是α-亚麻酸,有的群体的含量达37 62%。以上有关研究结果系首次报道,可供开发播娘蒿资源者参考。     

川西草地高亚麻酸植物播娘蒿的初步研究

为了掌握川西草原野生播娘蒿的生物学特性和经济价值，将川西地区的野生播娘蒿种子收集后在成都栽培观察，初步掌握了其生物学特性和生产价值，通过比较选出红原产播蒿的种子产量达到１１５９．５ｋｇ／ｈｍ＾２，含油量为４４．２０％，其油分中亚麻酸含量为４０．９０％，亚麻的理论产量可达２０９．４７ｋｇ／ｈｍ＾２，高寒草原产的播娘蒿引入低海拔地区种植可以秋播，幼细越冬生长正常，生育期为２１０ｄ，在高海拔区地区播娘蒿     

播娘蒿不同生育期鲜草产量与营养价值

对野生播娘蒿不同生育期的鲜草产量及营养价值进行了研究.结果表明,不同生育期的鲜草产量及营养价值差异显著;未抽苔期粗蛋白质和粗脂肪含量最高,且随着成熟度的提高而下降;开花期鲜草产量和营养价值均较高,是播娘蒿的最佳刈割期.播娘蒿粗蛋白和粗脂肪含量低于苜蓿,而粗蛋白含量高于黑麦草,营养化学类型基本为N型,是一种品质较好的饲草.     

植物资源菥蓂引种初步研究

植物资源菥蓂在川西北草原分布广泛,储量比较丰富.为研究和利用这一资源,进行了一些试验,得到了下列结果(1)将川西北草原几个地区所采集的菥蓂种子进行油分分析,分析结果表明,菥蓂种子油分的主要脂肪酸组成和普通甘蓝型油菜相近,其种子油可供食用和工业用.由于菥蓂是甘蓝型油菜的较近缘物种,其种子油的亚油酸和亚麻酸含量比普通甘蓝型油菜的高,认为有可能作为甘蓝型油菜优质育种的杂交亲本.(2)菥蓂种子引种成都种植时,基本上能正常生长发育,其生育期为190～197d,单株种子产量为3.9～5.6 g,理论种子产量为585～840 kg/hm2.虽然菥蓂在成都的种子产量较低,但它在川西北草原龙日坝种植时,其种子产量达2 250 kg/hm2.这说明菥蓂在川西北草原人工种植时有一定的增产潜力.(3)菥蓂在成都种植的产苔量为15 675～16 800 kg/hm2,在成都地区作为绿色野菜有一定的潜力.     

植物资源菥蓂引种初步研究

植物资源菥在川西北草原分布广泛,储量比较丰富。为研究和利用这一资源,进行了一些试验,得到了下列结果:(1)将川西北草原几个地区所采集的菥种子进行油分分析,分析结果表明,菥种子油分的主要脂肪酸组成和普通甘蓝型油菜相近,其种子油可供食用和工业用。由于菥是甘蓝型油菜的较近缘物种,其种子油的亚油酸和亚麻酸含量比普通甘蓝型油菜的高,认为有可能作为甘蓝型油菜优质育种的杂交亲本。(2)菥种子引种成都种植时,基本上能正常生长发育,其生育期为190~197d,单株种子产量为3.9~5.6g,理论种子产量为585~840kg/hm2。虽然菥在成都的种子产量较低,但它在川西北草原龙日坝种植时,其种子产量达2250kg/hm2。这说明菥在川西北草原人工种植时有一定的增产潜力。(3)菥在成都种植的产苔量为15675~16800kg/hm2,在成都地区作为绿色野菜有一定的潜力。     

播娘蒿的初步研究

对播娘蒿进行了初步的研究,其体细胞染色数目为２ｎ＝２８,种子含油量为４４２％,其中不饱和脂肪酸占８９２２％,亚麻酸占３８１３％。播娘蒿不仅具有极强的适应性和较好的农艺性状,且有一定丰产潜力。播娘蒿在工业用油和医药保健方面有开发利用价值。     

金·马组合防除麦田阔叶杂草效果好

<正>金·马组合(金植5%双氟磺草胺+马灵10%唑草酮)是美国富美实(FMC)公司最新推出的跨时代麦田阔叶杂草除草剂。一、主要特点1.杀草谱广泛:金·马组合(金植+马灵),能有效防除小麦田的猪殃殃、播娘蒿、繁缕等,同时对泽漆、牛繁缕、荠菜等有较好的控制作用,尤其对抗性播娘蒿特效。2.杀草速度快:用药后敏感杂草3~4小时后出现中毒症状,3~4天枯死,缩     

我国野生牧草种质资源的研究现状与存在问题

野生牧草是我国草原当中的重要资源,在草原生态平衡维持以及多样性维持方面具有很大意义。1研究现状目前我国对种质资源的研究现状体现在:1.1资源利用从上世纪60年代开始,我国即积极开展了对种质资源的研究利用。发现具有较好生长效果、较高饲用价值的牧草,引种试验后,在适应性以及抗逆性方面都体现出了较高的价值。80年代开始,完成很多野生牧草的引种栽培工作,对其进行推广后,增加对饲草的供应,在获得较好经济效益的情况下对生态环境也起到了积极的改善作用。     

野生牧草的引种驯化——Ⅱ油蒿

油蒿(A rtemisia ordosica Krasch.)又名黑沙蒿、鄂尔多斯蒿,系菊科蒿属灌木,典型旱生沙生植物.油蒿以其独特的生物学特性分布在干旱、半干旱的典型草原、荒漠草原、草原化荒漠及荒漠地带.概述了油蒿的自然分布、引种试种和应用过程、形态特征、植物分类和细胞学研究、生长发育、适应性和环境条件、建植技术及草地管理、虫害及其防治、营养价值,并介绍了同属植物的开发利用,以期为更好地推广种植和开发利用油蒿提供参考.     

野生牧草的引种驯化——Ⅱ油蒿

油蒿（Artemisiaordosica Krasch．）又名黑沙蒿、鄂尔多斯蒿,系菊科蒿属灌木,典型旱生沙生植物。油蒿以其独特的生物学特性分布在干旱、半干旱的典型草原、荒漠草原、草原化荒漠及荒漠地带。概述了油蒿的自然分布、引种试种和应用过程、形态特征、植物分类和细胞学研究、生长发育、适应性和环境条件、建植技术及草地管理、虫害及其防治、营养价值,并介绍了同属植物的开发利用,以期为更好地推广种植和开发利用油蒿提供参考。     

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。     

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。     

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。     

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。 …     

鸡败血支原体垂直传播模式及其阻断方法

以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。     

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.