"薯菌清"防治马铃薯真菌病害使用技术研究

采用饱和D最优设计法，对“薯菌清”防治马铃薯早疫病、晚疫病和尾孢菌叶斑病的最佳使用剂量和兑水量进行了田间药效试验。结果表明：“薯菌清”对以上3种病害的综合防效在80％以上的农艺措施为“著菌清”2015．6～2451mL／hm^2，兑水量455．18～674．21kg／hm^2。于病害始发期喷雾，间隔10d左右喷第二次。     

高压电场干燥技术在生物制品中的应用

通过用高压电场干燥设备与其他两种干燥设备(热风烘箱、流化床)对真菌(花生四烯酸)干燥后进行品质对比实验，结果表明：高压电场干燥外观颜色很好，能耗比其他两种干燥方法低50％～85％，酸价三种干燥方法相当，高压电场干燥比其他两种方法能更好的保存花生四烯酸(AA)的油脂含量．这一结果说明高压电场干燥技术在干燥生物制品领域有广阔的应用前景.     

气相色谱法测定真菌的脂肪酸组成

选用固定液为FFAP的石英玻璃毛细管柱，设置合适载气柱前压、分流比及程序升温，采用气相色谱法测定了采自云贵高原雪山、雪线附近土壤中的真菌的脂肪酸组成。测定结果表明，此方法能准确分离出真菌中的30多种组分，并鉴定出了主要的8种脂肪酸，筛选出能产生二十五碳五烯酸（EPA）的四种真菌。平行测定的相对标准偏差为0．67％－4．20％，而且EPA的出峰时间仅为5．905min，只需10min即可完成一次分析。     

Ecological studies on Aechmea bracteata (Swartz) (Bromeliaceae)

In the Yucatan peninsula, Mexico, Aechmea bracteata is more frequent in the low inundated forest than in hummocks or the semi-evergreen forest. Due to its flat smooth, ovoid seeds disseminated by birds, this epiphyte generally develops on rough-barked trees at the point where a large branch forks out. The presence of a rhizome permits the formation of groups of ramets comprising different levels of development from young shoots to blossoms and the differential rotting of dead dry ramets. In green mature ramets, an amphora-shaped leaf develops around the inflorescence, delimiting a central watertight cavity. Around this central cavity, inter-leaf spaces correspond to peripheral cavities where rainwater may accumulate. This structure permits the plant to be both a phytotelm and a myrmecophytic epiphyte, with green ramets sheltering a large diversity of both aquatic (mostly Diptera larvae) and terrestrial animals (mostly ants, cockroaches, mites, and springtails). Concerning ants, peripheral cavities sheltered small Myrmicinae (31·3% of the ramets), central cavities Pachycondyla villosa (Ponerinae) or Dolichoderus bispinosus (Dolichoderinae) (91·9%; N = 248). Rotting dry ramets sheltered only terrestrial animals, mostly detritivores which are classically present in the leaf litter and ants such as Cyphomyrmex minutus, a primitive Attini and numerous Ponerinae, predators of the detritivores. Both green and dry ramets constituted good shelters for incipient colonies.     

附生植物垂茎异黄精（Heteropolygonatum pendulum）的生物生态学特性

垂茎异黄精是中国特有的附生植物,目前仅在四川贡嘎山海螺沟发现其分布．在海螺沟的青石板沟对其个体和植物群落特征,重点对其着生树木及其微环境特征进行了调查．共搜寻到27株树木上的110株垂茎异黄精个体,分布在海拔2255~2412 m之间．垂茎异黄精的结实率为32.7%,植株平均长度为43.8±18.3 cm,平均生长高度为11.2±3.6 m,平均叶片数量为4.4±3.5片,平均结实数量为1.8±3.6个/株．垂茎异黄精主要生长在苞槲柯林和苞槲柯、香桦、扇叶槭老龄林中,层次分明、物种组成丰富．垂茎异黄精所附生树木的平均胸径为87.7±31.1 cm,平均高度为20.9±5.0 m．垂茎异黄精主要着生在苞槲柯树的侧枝上,平均侧枝角度为1.5±13.6 °,平均侧枝直径为14.3±9.5 cm,平均苔藓厚度为6.1±1.0 cm,苔藓种类丰富．