初探酵素生物菌肥料对盐碱地水稻生长的影响

探讨了大安市盐碱地施酵素生物菌肥料，采用简塑盘大棚育壮秧，浅翻（ 耙） ，洗盐排碱，配施氮、磷、钾、锌肥，综合防治病虫草害等综合栽培措施，水稻公顷产量获得８ ５００ ｋｇ 以上的丰产技术．其产量结构为每平方米穴数为２５ 穴，每平方米穗数６００ 穗，穗总粒数为８７ 粒，结实率为８９ ％ ，千粒重为２７ ．７ ｋｇ ，产量为８ ５００ ｋｇ．     

云计算在中小企业信息化中的应用研究

云计算是继网格计算后又一项正在兴起中的技术,它的出现使"互联网上众多的计算机成为一台虚拟超级计算机"的梦想逐渐变成了现实。概述了云计算的概念与原理,阐明了云计算在中小企业中实施的技术与优势,提出了云计算在中小企业实施中存在的问题以及解决问题的策略。     

信阳市苗木生产中存在的问题与对策

信阳市苗木生产发展迅速,但仍存在着品种单一、结构不合理、缺少品牌优势、科技含量低等问题。应采取统一规划、合理种植、因地制宜等技术措施,促进信阳市苗木生产的可持续发展。     

关于温州市推行水稻机械栽插的思考

文章首先分析了浙江省温州市机插的现状,指出加快突破插秧机械化技术瓶颈,已成为推进水稻生产全程机械化,实现农业现代化的重要主攻方向,要制订切实可行的水稻插秧机械化推进计划;从节省秧田、节水肥药、节本省工、高产稳产、避灾增效、五个方面阐述了机插的优势,从技术上可行、政策上有利、推广有依托、多数农民观念转变四个方面阐述了机插有利条件;最后提出推进水稻机插的对策与措施。     

单边支重轮半体切边-冲孔复合模设计

介绍了在曲柄压力机上切边冲孔的复合模结构设计、工作原理及装配和调试要求等.     

A fine map for maternal lineage analysis by mitochondrial hypervariable region in 12 Chinese goat breeds

As the fast pace of genomic research continues to identify mitochondrial lineages in animals, it has become apparent that many independent studies are needed to support a robust phylogenetic inference. The aim of this study was thus to further characterize the maternal lineage, proposed to originate in southwestern region of China, using a wider survey of diverse goat breeds in China. To this end, we sequenced the mitochondrial hypervariable region 1 (HVR1) of the mtDNA control region in 145 goats of 12 Chinese breeds. Phylogenetic analysis revealed that Chinese goats were classified into four distinct lineages (A, B, C and D) as previously reported. A Mantel test and the analysis of Analysis of Molecular Variance (ANOVA) indicated that there was not an obvious geographic structure among Chinese goat breeds. Population expansion analysis based on mismatch distribution and Fu's Fs statistic indicate that two expansion events in Chinese goats occurred respectively at about 11 and 29 mutational time units ago, revealing two star-like subclades in lineage B corresponding to two population expansion events. Moreover, lineage B sequences were presented only in the breeds of southwestern or surrounding regions of China. Multiple lines of evidence from this study and previous studies indicate that for Chinese goats mtDNA lineage B originated from the southwestern region of China.     

Design Method of Moment-strengthening on Tension Side When Load Un removed

Based on the linear strain distribution assumption, strain development of tensile bars and ultimate moment capacity of strengthening section, which strengthened on tension side with service load un removed, is investigated. It is showed that the higher the service load bending moment to original moment capacity ratio M 1k /M u1 is, the smaller the tensile strain of strengthening re barsis, and the more the amount of strengthening re barsis, the smaller the tensile strain of original re barsis. It also showed that,When original re bar area is relatively small and strengthening re bar area is adequate, both original and strengthening re bars may get yielded and a great increment in section moment capacity is achieved, even though the ration M 1k M u1 has a relatively high value.     

超声波循环提取大豆异黄酮的研究

大豆(Glycine max)种子中含有高生物活性的异黄酮类物质,但传统的提取方法耗时费事,效率低.实验采用超声波在常温常压下循环提取大豆中的异黄酮,时间短,效率高,并对超声波提取大豆异黄酮的工艺参数进行了研究,为超声波提取大豆异黄酮走向工业化提供了一定的理论和技术依据.     

20种有毒植物的不同提取物对玉米弯孢叶斑病菌的抑菌活性测定

用生长速率测定法，测试了长白山20种有毒植物的不同溶剂提取物对玉米弯孢叶斑病菌（Curvularia lunata Boed．）的离体抑制活性．结果表明，供试20种有毒植物的不同溶剂提取物在稀释1000倍的情况下，艾蒿正丁醇提取物对供试病原菌的菌丝生长抑制率最高（81．01％），藜芦生物碱提取物与延胡索氯仿提取物也表现出较高的活性。     

马鹿卵母细胞的超微结构研究

目的通过对马鹿卵母细胞的超微结构进行研究,旨在为马鹿繁殖育种的研究提供基础理论依据。方法用FSH对母马鹿进行超数排卵,采用抽吸法和切割法采集卵母细胞,利用透射电镜观察其超微结构。结果在光镜下,马鹿卵母细胞的平均直径为172.958±17.298μm,卵丘细胞厚度为67.750±33.107μm,透明带厚度为13.782±2.516μm。电镜下,卵母细胞外的卵丘细胞紧紧包裹卵母细胞,且与卵母细胞之间有大量细长的微绒毛相联系;卵丘细胞核呈卵圆形,其长径为4.250±0.042μm,短径为2.750±0.071μm;透明带均匀,与卵母细胞结合紧密;在皮质区集中分布大量的多嵴型线粒体、脂滴和空泡,线粒体长径为0.600±0.106μm,短径为0.490±0.117μm;细胞核中颗粒状的核质分布非常均匀。