新陆中20在新疆巴州地区的表现及栽培技术要点

韩俊伟1,李旺2,杨立江1(1.新疆兵团农二师农科所841000;2.农二师建筑勘测设计院)新陆中20于1995年以89-19为母本,优质抗病中长绒棉材料33为父本杂交,经过南繁加代及在病圃定向选择而成,2004年通过新疆维吾尔自治区农作物品种审定委员会审定命名。1种植表现全生育期141~143天,属早中熟陆地棉。植株塔形,株高60.0 cm左右,茎较粗,茎秆绒毛较密。Ⅱ式分枝,始果节位4.5。结铃性强,铃较大,长卵圆形有铃尖,铃重6.0 g左右。吐絮畅且集中,纤维色泽洁白,含絮力适中,易采摘。衣分43.0%,子指10.4 g,衣指7.7~8.1 g。枯萎剖秆病指2.5,黄萎病花铃期发病高峰…     

全混合日粮在舍饲养羊中的应用分析

文章分析了我同当前养羊业的现状，大力发展肉羊生产是长远出路。TMR在肉羊生产上将比传统饲喂方式有较多的优势：生产方便，营养全面，便于机械化作业等，值得大力提倡和发展。     

Viruses and virus-like particles detected during examination of feces from calves and piglets with diarrhea

A total of 763 fecal or intestinal samples from diarrheic calves and piglets were examined for viral content by immunofluorescence, electron microscopy or cell culture. Routine fluorescent antibody and cultural tests detected rotavirus (n=126), coronavirus (n=80) and bovine viral diarrhea virus (n=13). Electron microscopy detected rotaviruses (n=24) and coronaviruses (n=17) not identified by standard fluorescent antibody tests. Other viruses detected by electron microscopy included Breda virus-like particles (n=49), astroviruses (n=1), caliciviruses (n=1), rhabdoviruses (n=1), parvoviruses (n=2), enteroviruses (n=3), togavirus-like particles (n=2), and “chained” particles (n=5). Mixtures of several of the viruses were detected in a number of fecal samples.

The survey emphasized the value of electron microscopy as a broad-spectrum diagnostic tool.

     

The East coast magnetic anomaly

A model is proposed for the East Coast Magnetic Anomaly that, for the first time, incorporates an observed basement feature-a normal fault that consistently lies below the landward flank of the anomaly. The East Coast Magnetic Anomaly is similar to slope anomalies found over passive continental margins in many parts of the world. Thus the proposed model can be used to interpret slope anomalies in general.     

Methylation of tin by estuarine microorganisms

Mixed inoculums of microorganisms from Chesapeake Bay sediments transformed inorganic tin (SnCl(4) . 5H(2)O) to organotin compounds. Dimethyltin and trimethyltin species were identified as products by gas chromatography-mass spectrometry. Methylated tin species were not observed in sterile controls or in poisoned controls. Thus, estuarine microorganisms have the potential for transforming tin to toxic organotins and for mobilizing tin in the ecosystem.