宝兴县经济社会发展战略研究

宝兴县是我省不发达山区,以农业为主,其他行业缺乏活力,阻碍了农业的发展,而农业又限制了整个县的发展。本文提出,应该承认本地需要有一个整体发展。这就是说需要建设、改进和维护公共设施(特别是能使本地区打破孤立状态的)、公共服务业以及开拓其他行业,诸如交通(即使仅仅只有较方便的通路)、工业、手工业、旅游业和林业等。农业仍然是重要的。地方政府应该致力于稳定农业生产并增加食品供应的可靠性。宝兴县的农业具有两种功能:为地方农业生产作出贡献的经济功能和保护自然环境的社会功能。作者强调对农民提供职业训练、信息和技术及经济咨询服务的重要性。     

天然香豆素衍生物~（13）C－NMR化学位移研究──Ⅰ．取代基效应因子与化学位移的定量关系

通过模型化合物１３Ｃ－ＮＭＲ化学位移的经验取代基参数，对天然香豆素衍生物１３Ｃ－ＮＭＲ化学位移，进行了系统的研究．结果表明，模型化合物的取代基参数，与香豆素衍生物的化学位移具有良好的线性关系．从而提出了香豆素取代基效应因子，建立了香豆素衍生物１３Ｃ－ＮＭＲ化学位移与取代基效应因子的定量关系式．用于计算和预测香豆素的化学位移．     

Mirabel（迈瑞佰）百脉根引种及生产性能的动态研究

文章对Ｍｉｒａｂｅｌ百脉根品种的饲草和种子生产有关的特性进行了系统的观测，结果表明，该品种具抗寒抗旱，耐盐碱性强，分枝多，叶片丰富，生活第２、第３年饲草产量可达４５００ｋｇ／ｈｍ２，种子产量近９００ｋｇ／ｈｍ２，叶量占茎叶总量的４６％；饲草营养价值高，开花期粗蛋白质含量占干物质量的２０．７９％；粗纤维占２６．４３％；蛋白质的含量高于紫苜蓿、红豆草；而粗纤维又比它们低等优点，在我国西北内陆寒冷干旱具有灌溉条件的甘肃河西走廊地区具有较高的引种栽培价值。     

Diversity Among Potato virus Y Isolates Obtained from Potatoes Grown in the United States

ABSTRACT Potato field isolates (Solanum tuberosum) of Potato virus Y (PVY) collected from the midwestern and western United States were characterized using serological, molecular, and biological assays. PVY field isolates were grouped into the previously defined categories: PVY(O), European PVY(NTN), North American PVY(NTN), and PVY(N:O) recombinant and four previously undefined groups. Studies reported here agree with published reports from Europe and elsewhere in North America as PVY isolates capable of causing veinal necrosis in tobacco indicator plants appear in high frequency. In contrast to European experiences, PVY tuber necrosis isolates have a PVY(O) coat protein rather than that of PVY(N). Several PVY(N:O) recombinant isolates induced potato tuber necrotic ringspot disease (PTNRD) in the highly susceptible potato cv. Yukon Gold. The PTNRD symptoms produced by these PVY(N:O) recombinants were atypical compared with lesions found on the same cultivar infected with either the European or North American PVY(NTN) isolates. These PVY(N:O) isolates produced a roughly circular, sunken necrotic lesion on the surface of the tuber instead of the typical external sunken ring pattern displayed by PVY(NTN) isolates. This study establishes the complex nature of PVY populations within the U.S. potato industry and clearly demonstrates the diverse nature of PVY in the United States.     

西洋杜鹃叶片矿质营养含量的研究

为了给西洋杜鹃的营养诊断提供基础数据,对生长在山东的西洋杜鹃叶片N、P、K、Ca、Mg、Fe、Mn、Cu、Zn的含量进行测定,并运用数理统计方法和SPSS软件对测定结果进行分析。结果表明,未成熟叶片中各营养元素含量分别为N32.43g/kg,P1.92g/kg,K14.24g/kg,Ca28.89g/kg,Mg2.32g/kg,Fe45.87mg/kg,Mn183.69mg/kg,Cu4.18mg/kg,Zn47.76mg/kg;活性Fe的含量为21.16mg/kg;N、P、K的比例为1∶0.06∶0.44。成熟叶片中营养元素含量分别为N24.69g/kg,P1.38g/kg,K13.52g/kg,Ca47.35g/kg,Mg3.72g/kg,Fe141.07mg/kg,Mn398.45mg/kg,Cu14.22mg/kg,Zn104.84mg/kg;活性Fe的含量为33.18mg/kg;N、P、K的比例为1∶0.06∶0.55。     

家禽饲料代谢能的评定技术

家禽饲料代谢能的评定是家禽饲料营养价值评定中一个极其重要的内容，是研究家禽营养需要量的基础，也是配制最佳饲料配方的关键，对提高家禽的生产效率、节约饲料资源具有重要意义。因此，探索家禽饲料代谢能的快速、简便、准确的评定方法一直是动物营养研究中的热点。世界各国的营养学家们经过几十年的探索和努力，摸索出了许多科学、实用的代谢能测定方法，将这些方法归类主要有常规法、快速测定法和体外法等。     

大量使用非常规饲料对育肥猪屠宰性能影响及经济分析

试验组A饲料中添加非常规饲料,试验组B饲料中添加中药添加剂,试验组C饲料中添加苜蓿草。测定试验各组胴体品质、猪肉风味和品质等各项指标。试验结果表明:B组的眼肌面积比A组提高33%,差异极显著(P<0.01)。C组的眼肌面积比A组提高19%,差异极显著(P<0.01)。纯利润指标A组最少,每头相差77.5元,差异极显著(P<0.01)。毛猪重A组与B组、C组差异极显著(P<0.01)。     

对骨粉、肉骨粉加工生产的研究

骨粉、肉骨粉属于动物源性饲料，所谓动物源性饲料产品是指以动物或动物副产品为原料．经工业化加工制作的单一饲料，目前市场生产加工的主要有肉粉、肉骨粉、鱼粉、血粉、血浆粉、血清粉、羽毛粉、水解毛发蛋白粉、皮革蛋白粉、乳清粉、骨粉、动物油渣等。     

畜科:贸易大腕,研发支撑

<正>四川省畜科饲料有限公司(以下简称"畜科")成立于1985年,是一家集研发、生产、营销、技术服务、进出口国际贸易于一体的大型科技型股份制企业。多年来,畜科在国际贸易的业绩尤为突出,成为业内"贸易与现代科研有效结合"的成功案例。     

Evaluation of a recombinant MIC3 based latex agglutination test for the rapid serodiagnosis of Toxoplasma gondii infection in swines

The entire gene encoding microneme protein 3 (MIC3) from Toxoplasma gondii was cloned into the plasmid pGEX-KG and subsequently expressed in Escherichia coli as a glutathione-S-transferase (GST) fusion protein. The recombinant MIC3 (rMIC3) was purified and evaluated in a latex agglutination test (LAT) as the diagnostic antigen for the detection of antibodies to T. gondii in pig sera. The specificity, stability, and reproducibility of the test were examined. No agglutination was found when the sensitized latex beads were mixed with phosphate-buffered saline (PBS), borate-buffered saline (BBS), normal saline, and negative serum samples. There was no cross-reactivity with the standard positive sera of other pathogens. But intense agglutination occurred with T. gondii antibody positive serum samples. In our study, the coincidence rate of tested positive-sera of the LAT with rMIC3-sensitized latex particles and the ELISA with rSAG1 was up to 92.8%, T. gondii specific antibodies were detected by the LAT in all piglets that were experimentally infected with T. gondii tachyzoites from 8 to 42 days after infection. Our results indicated that the rMIC3 based latex agglutination test appears to be suitable for the detection of T. gondii antibodies at the early stage of infection.