"春鸟牌"叶面肥对桑叶增产效果试验

"春鸟牌"叶面肥是广西南宁南国春生物科技有限公司根据不同植物的生理特点及生长规律,用现代生物科技生产的系列产品.其中桑树专用含氨基酸叶面肥含有多种桑树生长所必须的氨基酸和铜、铁、锌、锰、硼等微量元素.为了解该肥料对桑叶的增产效果,笔者按照产品的使用说明,于2006～2007年春季,进行桑树叶面喷施试验,现将试验结果报告如下:     

桑园不同叶面肥对产量的影响

本试验调查了KH_2PO_4、叶面宝、MMI桑树复合微肥、NK-P植物营养素等几种叶面肥料对桑叶的增产效果.结果表明,MMI桑树复合微肥效果最好,产叶量增加22.9%,其次为NK-P植物营养素.MMI主要是通过增加单叶重而增产的,对改善叶质、增强树势也有明显效果.     

RHM叶面肥喷施桑树及养蚕试验初报

RHM叶面肥是含有机物、多种营养元素的稀土类表面喷施型肥料.本试验采用2500ppm、1500ppmm、1000ppmm三个浓度对桑树叶面进行喷施;结合桑叶喷施的不同浓度,设三个养蚕试验区,进行养蚕、制种和第二代生长情况调查.通过试验结果分析可以得出:该叶面肥对桑树的产叶量有增产作用,在1000ppm浓度下,亩增产18%,随着浓度的增加,其增产效果变化不大.桑树叶面施肥采用该肥时其浓度最佳为1000ppm;该叶面肥对家蚕的生长发育无明显的作用,各试验区与对照区之间无明显差异.     

螯合态多元复合微肥对桑树的增产效应研究初报

陕西省宁陕多元复合微肥厂生产的"螯合态多元复合微肥"是一种全效性叶面肥料,含有植物生长所必需的大量和微量营养元素,经各地试验证明对多种作物有增产效果.为了解该叶肥品种是否适合桑园使用,1992年在中国农科院蚕业研究所进行了桑树喷施试验,发现该产品增产桑叶效果稳定,是一种较好的桑树叶面肥料.     

“钟字牌”叶面肥在桑树上的应用效果

曾报道 ,“钟字牌”叶面肥在粮食、水果等作物上喷施均有增产效果 ,但在桑树喷施有否增产作用未见报道。为探讨该肥在春期是否有促进桑树新梢的生长 ,提高桑叶产量的效果 ,在氮、磷、钾对桑树生长供需平稳的状态下 ,于２００１年春做了在桑树叶片上喷施“钟字牌”叶面肥试验 ,结果如下。１材料与方法供试肥料为“钟字牌”叶面肥（安徽省大宁叶面肥厂生产 ,以下简称叶面肥）。其主要成分 :氮、磷、钾总养分≥１５ % ,微量元素≥１０%。供试桑树品种为荷叶白 ,树龄８年。试验地点在杭州蚕种场 ,土壤类型为黄松土 ,土壤肥力中等。试验共设两个…     

茶树喷施“三多素”的增产效应

“三多素”叶面剂是一种新型高效植物生长促进剂。含有丰富的蛋白质、多种有机物、无机物和微量元素。在作物生长和发育的关键性生理阶段 ,提供均衡营养物质和生长促进物质 ,使作物更快生长。为探讨在茶树上的应用效果 ,1999年春笔者进行了试验。1　试验材料和方法试验设在丽水市丽新乡咸宜茶场。该场茶树长势均匀 ,肥培管理一致 ,属鸠坑群体品种。试验采用的“三多素”叶面剂由市植保站提供。试验设五个处理 :三多素 10 0 0倍、150 0倍、2 0 0 0倍、30 0 0倍和清水对照。试验小区随机排列 ,3次重复 ,每小区面积为 10ｍ2 。 3月 8日萌芽初期…     

茶园施用"恒信牌"多效有机肥的试验

"恒信牌"多效有机肥由有益微生物哈茨木霉真菌与合理配比的有机肥结合而成,对有机质物料有很强的分解作用,特别是对一般微生物难以分解的有机物也有较强的分解作用,从而促进茶树的吸收利用,刺激茶树生长发育,使叶色浓绿、植株健壮、根系发达.此外,还能抑制白绢病、立枯病等根部病害的发生,降解土壤中残留农药的作用.为探索"恒信牌"多效有机肥对茶叶的增产提质效应,为其在茶叶生产上推广应用提供科学的依据,开展了本试验.     

百绿丰增产效果及使用技术

百绿丰是由承德百绿沃土生物技术有限责任公司开发生产的一种新型叶面肥和拌种剂.近年来的试验示范结果表明在农作物上使用均表现早熟、增产和改善品质.     

桑树追施HA—VI型叶面肥的增产试验报告

本试验用重庆市江津化学试剂厂出品的HA—VI型桑用叶面肥,于1992年春季进行了田间小区试验和室内实验室叶质测试,验证了该肥确有增产、增质的效果。以25克兑水6千克产量最高,增产桑叶16.67％,且18种主要氨基酸含量为19.76％,比对照(含量为17.63)高2.13％。     

“三高灵”在桑树上的应用试验

<正>“三高灵”是一种全新无毒复合叶面肥,由南京农业大学土化系植物营养与施肥研究室研制,在大田作物应用,增产效果为10~15%,但对桑树的应用效果尚无报道。     

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.