辽东地区落叶松人工林连作对立地质量的影响

采用解析木导向曲线法编制了辽东地区日本落叶松地位指数表。在此基础上，对落叶松地拉指数与立地因子及落叶松栽植代数的关系进行了分析，认为不同栽植代数对落叶松人工森地位指数影响差异显，落叶松连作造成立地质量下降。     

高效液相色谱法测定齿毛芝中的碱基

采用250SS4.6-ODSZ-8/5色谱柱,体积分数20%的甲醇为流动相,紫外260nm检测,尿嘧啶,尿苷,腺嘌呤腺苷的保留时间分别为2.23min,2.97min,4.13min和6.74min,检测齿毛芝中碱基的摩尔比依次为1`.24:0.41:2.29:2.05.     

兴安落叶松育苗容器质地及规格的研究

1988～1990年通过一年生苗的高生长、地径与合理密度的观察。兴安落叶松育苗容器材料和规格的研究结果表明,纸容器的苗木无论在苗高、地径上与其它容器比较都具有显著性差异,容器规格选择φ3.8×12.5cm为宜,较理想密度为910株/m~2。     

应用ILASII实现期刊订购自动化

期刊订购是期刊工作的基础,是图书馆工作的重要组成部分。本文就图书馆自动化集成系统ILASⅡ在期刊订购上的应用进行了探讨,旨在和同行交流期刊工作的经验和体会,促进期刊自动化管理,使期刊管理进入快车道,实行一体化。同时也就期刊的一些变化给期刊订购带来的不便提出了建议和期望。     

Landscape and habitat factors affecting cabot's tragopan Tragopan caboti occurrence in habitat fragments.

Cabot's tragopan Tragopan caboti is an endemic and endangered pheasant of the lower montane forests of southeastern China. The typical habitats of the tragopan have been seriously fragmented because of forest management for timber production and farmland reclamation in recent years. The effects of the fragment size and isolation on the distribution of the cabot's tragopan were studied in Wuyanling Natural Reserve. Thirty one habitat fragments (2.5-48.5 ha) surrounded by non-habitat sapling coniferous forests, in an intensively managed forested landscape, were surveyed over four seasons for the occurrence of cabot's tragopan. Five of the 31 fragments were occupied in all four seasons and nine were not occupied. Both landscape and habitat factors affected the occurrence of cabot's tragopan, with landscape factors having the greatest effect. Large and less isolated habitat fragments containing a larger amount of the tree Daphniphyllum macropodum were occupied significantly more often than small, isolated fragments. The appearance of cabot's tragopan in the habitat fragments was best explained by the size of the fragments, the distance to the nearest suitable habitat and the amount of macropdous daphniphyllum trees. Our results could be used to improve the management of the forests where Cabot's tragopan occurs in southeastern China.     

几种代表性牧草对水牛泌乳高峰期生产性能的影响

将36头泌乳期、产奶量相近的水牛均分3组,探讨禾本科黑麦草、豆科紫花苜蓿、蓼科鲁梅克斯K-1三种牧草对泌乳高峰期生产性能的影响,结果发现,饲喂鲁梅克斯K-1分别比紫花苜蓿和黑麦草提高15.93%、13.14%的产奶量(P<0.05),以及6.09%、6.63%的乳脂率(P<0.01);而紫花苜蓿与黑麦草间差异均不显著(P>0.05)。故种植鲁梅克斯K-1适合我国农村散养水牛的小区放牧或舍饲补饲。     

抓好公路施工管理与质量管理的体会

工程质量是企业素质的综合反映，是项目管理水平的重要标志。质量是企业的生命线。     

“砸缸之智”与“让梨之贤”探析——学习加强和改进未成年人思想道德建设有感

本文阐述了当今培养未成年人思想道德建设的重要性。倡导人们学习中国古代孔融“让梨”精神和司马光“砸缸”救人的智慧。进而表明积极构建和社会三位一体的教育体系。努力创造未成年人健康成长的良好社会环境。     

收获期对杂交早稻品质的影响

研究了不同收获期对杂交早稻稻米品质的影响 ,结果表明 :不同收获期处理间稻米的糙米率、精米率、长宽比、垩白指数及直链淀粉含量均无显著差异 ,但胶稠度及蛋白质含量均存在显著差异 ,以抽穗后 35d收获的稻米胶稠度最高 ,以抽穗后 2 5d收获的稻米蛋白质含量最高