基于GIS的忻州市土地利用分区研究

以忻州市为例,研究了基于GIS方法的层次分析法和统计聚类法在土地利用分区中的应用。首先建立分区指标体系,并利用层次分析法确定指标权重;然后利用GIS的统计、分析功能获得原始数据,并进行SPSS聚类分析;最后利用GIS的空间叠加分析和图形输出功能,得到较科学的分区结果,将忻州市划分为4个土地利用一级区、12个土地利用亚区,为土地管理者提供决策依据。     

GFP叶绿体转化烟草茎叶降解对土壤微生物数量及土壤酶活性的影响

以GFP叶绿体转基因烟草及对照烟草(非转基因烟草)为材料,在实验室条件下研究了叶绿体转基因烟草及对照烟草(非转基因烟草)在茎叶降解过程中及完全降解后对土壤微生物主要类群(细菌、真菌、放线菌)的影响,并对相关的土壤酶活性进行了分析.结果表明,在烟草茎叶降解过程中及完全降解后:(1)叶绿体转基因烟草及对照烟草(非转基因烟草)对微生物的数量影响不显著;(2)土壤微生物总量相比为细菌>放线菌>真菌;(3)叶绿体转基因烟草茎叶降解对土壤酶活性没有显著影响;(4)GFP基因没有水平转移到土壤微生物基因组中.以上结果显示GFP叶绿体转化烟草茎叶降解对土壤微生物数量及土壤酶活性没有显著的影响.     

印度SQL Server数据库设计教材的特色与理念

教材是教学思想与教学内容的重要载体。从中印教材的编者队伍、内容组织、编排特点、知识结构的优化与教学方法等对比,感悟印度的SQL Server数据库设计教材在培养学生解决问题的能力和创新能力上极具特色,对计算机专业由学科体系向行动导向课程模式的顺利转型具有重要的借鉴作用。     

应用ISO9000过程方法加强基本科研业务费项目管理

该文在分析基本科研业务费项目特点与管理要求的基础上,结合ISO9000中的过程方法,介绍了加强基本科研业务费项目过程管理的主要措施,期望为今后基本科研业务费管理模式的探索与完善提供借鉴。     

浅谈发酵床养猪工艺特点及与传统集约化养猪工艺比较

作者综述了发酵床养猪工艺的起源、特点,并与传统集约化养猪工艺进行了比较,为研究和使用发酵床养猪工艺提供一些参考。     

基于层次分析法与模糊集理论构建实验动物福利问题评估方法

采用层次分析法与Delphi法建立动物福利问题评估指标体系,系统测定每种福利问题对动物的影响程度;应用模糊集理论将影响较大的福利问题归类到关键的福利问题并进行排序,结果得到最优先的问题就是最应该首先被解决的问题。该法在解决动物福利关键问题上具有可操作性强、定量与定性相结合、广泛参与性的特点。     

案例教学在《生态规划学》课程中的应用

案例教学法是一种具有启发性和实践性的教学方法。《生态规划学》是一门实践性很强的课程,针对案例教学法以及《生态规划学》课程的特点,探讨了在《生态规划学》课程教学中运用案例教学法的必要性及其在教学过程中案例的设计与应用,并分析总结了案例教学过程中应注意的问题。     

种植密度对东方百合“西伯利亚”生长及切花品质的影响

为了研究不同种植密度对东方百合"西伯利亚"生长及切花品质的影响,试验选用周径16～18 cm的东方百合"西伯利亚"为试材,分别设32株·m2(处理A)、44株·m-2(处理B)、52株·m-2(处理C)3个种植密度处理.结果表明,不同种植密度下的东方百合"西伯利亚"生长发育进程的总体趋势基本一致,种植密度对东方百合"西伯利亚"生长发育进程的影响主要出现在植株生长发育的中后期,但处理间的差异不显著;种植密度对东方百合"西伯利亚"的生物学性状具有一定影响,其中处理A的叶片数、比叶重、基根均长以及茎根均长都显著高于处理C;种植密度对东方百合"西伯利亚"的干物质积累和分配存在一定影响,除了切花产量之外,不同种植密度下的东方百合"西伯利亚"的其他切花品质指标虽然存在一定差异,但均不显著.因此,适当密植不仅对东方百合"西伯利亚"的生长和切花品质不会造成较大的影响,而且还可以有效地利用各种资源,增加单位面积的切花产量,进而提高切花生产企业的经济效益.     

间作小麦根际和土体磷养分的动态变化

 通过田间试验,研究比较了小麦与蚕豆间作和小麦单作环境条件下,小麦根际和土体速效磷养分的动态变化,探讨了小麦单作和小麦与蚕豆间作对小麦根际磷养分的影响。结果表明,单作小麦和间作小麦根际速效磷含量在各生育期呈先升高后降低的变化趋势,土体速效磷含量单作小麦在灌浆期最高,间作小麦在抽穗期最高。小麦蚕豆间作提高了拔节至灌浆期小麦根际速效磷含量,显著降低了成熟期根际速效磷含量和土体磷含量。拔节期、抽穗期、灌浆期小麦根际速效磷含量分别提高了6.81%,8.71%,12.95%,成熟期根际速效磷含量降低了21.11%     

Growing conditions and postharvest management can affect the essential oil of Origanum vulgare L. ssp. hirtum (Link) Ietswaart

Origanum vulgare subsp. hirtum (Link) Ietswaart (Greek oregano) has been cultivated since ancient times thanks to its herbal and therapeutic properties. Currently, it is added in various commercial preparations thanks to its essential oil composition. This group of secondary compounds is affected in quantity and quality by biotic and abiotic factors during the cultivating phase and by the postharvest management. Thus, the aims of the work were to study: (1) how the growing conditions (soil full-light treatment; pot full-light treatment; pot 50%-shade treatment) can affect the essential oil content and the essential oil profile of Greek oregano branches at full-blossoming stage; and (2) how the postharvest management (distillation of the essential oil from fresh herbs, dehumidified herbs or oven-dried herbs) can affect the essential oil content and the essential oil profile of this species. The growing conditions significantly affected the biometrical parameters. The pot full-light treatment contained the highest dry matter percentage (36.5%) and the highest essential oil content, which was directly correlated to the former parameter (r = 0.890**). The postharvest management did not affect the essential oil content. The growing condition significantly affected the characterizing γ-terpinene, cis-sabinene hydrate, 4-terpineol, α-terpinene, linalyl acetate, and β-bisabolene, while it did not affect carvacrol (mean value 15.8%), p-cymene (mean value 6.0%), or sabinene (mean value 3.9%). The postharvest management significantly affected carvacrol, cis-sabinene hydrate, 4-terpineol, p-cymene, α-terpinene, linalyl acetate, and β-bisabolene, while it did not affect γ-terpinene (mean value 14.7%). The response of some compounds to growing conditions led us to hypothesise an essential oil profile of the plants grown in pots at 50%-shade to be more of a vegetative stage type oil than the essential oil profile of the plants grown in soil, although all were at the blossoming stage. The analyses on the individual compounds indicated that, even though the essential oil content in oregano did not change with a change in postharvest management, biochemical changes occurred on the profile. These could be due to enzyme activity, dilution effect or temperature effect during the drying processes. The oven-drying process and the dehumidifying process changed the essential oil profile in a similar way compared to the essential oil profile distilled from fresh herbs. Thus, when it is not possible to extract the essential oil directly from fresh herbs, processors can dry the oregano according to the equipments they have available.