饲料资源量概念及其判断

首先提出并讨论了饲料资源量的主体部分就是饲料能量总量及饲料蛋白质总量的问题。然后,用相关及回归方法筛选出了牛代谢能及粗蛋白质指标。在此基础上,建立了对饲料资源的品质和数量进行判断的蛋能结构指数及蛋能丰度指数体系。     

一年生苜蓿种质资源形态变异及其形态特征

以22份一年生苜蓿为材料,对生育期和外部形状进行观测和统计分析,并对形态类型加以聚类分析。结果表明：（1）一年生苜蓿的茎为直立或匍匐,茎高在7．0～30．7cm,3出羽状复叶,种子为黄色、肾形。生育期在95—140d,从生育天数可分为早熟型和晚熟型;（2）一年生苜蓿种内变异很大,其中主茎长度和自然高度的变异系数最大,分别为43．0％和42．9％。其次是叶长和叶宽,变异系数分别为33．3％和30．0％。而第2主茎长度变异系数是27．6％,伸展长度变异系数22．1％;（3）对一年生苜蓿在干旱地区和高寒地区的生长状况的比较发现,一年生苜蓿更适应于干旱地区的生长;（4）一年生苜蓿的主茎长度越长,第2主茎长度越长,自然高度越高,伸展长度越长,叶长和叶宽也越长;（5）通过形态类型的聚类分析,可将一年生苜蓿分为3个类型,直立型,匍匐型和低矮型。     

The barnacle and the building: a modern morality tale

A rare and almost complete barnacle fossil, previously described on the basis of two isolated shell fragments, was recently exposed in a limestone block on the outer wall of Melbourne's Old Magistrates' Courts in Victoria, Australia. These courts comprise one of the oldest and grandest buildings in Melbourne and because of this they have a heritage listing. As heritage‐listed buildings are protected from alteration by law, and as removal of the fossil would be deemed “alteration”, official permission had to be obtained to extract the specimen. This paper discusses the processes involved with extraction of a unique specimen from a protected building and provides an overview of the palaeontological significance of the fossil. Consideration is given to the likely fate of a fossil of this nature, situated a little below eye level on a busy city street, if it was left in situ; finally, the implications of designating a holotype from material removed from a building are assessed.     

Effects of a 10-year conservation programme on the genetic diversity of the Pottoka pony--new clues regarding their origin

Here, we present the results of a genetic analysis of 463 Pottoka ponies corresponding to four generations, using 17 microsatellite markers. Ten years after the beginning of the Pottoka conservation programme, the values for the genetic diversity of the breed are still high and stable, indicating the success of the programme. We found null alleles in Pottoka for the ASB23, HMS3 and HTG10 microsatellites. Together with information obtained from other pony breeds from the Iberian Peninsula, this finding indicates that these microsatellites should not be used for phylogenetic analyses or parentage tests, at least for these breeds. The high heterozygosity exhibited by this breed in comparison to other ponies, together with its genetic proximity to the centroid of the allele frequencies, suggest that Pottoka allele frequencies are close to those initially exhibited by the ancestors of current European ponies. The results obtained in the current work, together with results from previous studies of ponies and horses from the Iberian Peninsula, corroborate the idea of a unique origin of all ponies from the European Atlantic Area. In contrast, our results do not corroborate the idea that these are derived from a domestication event in the Iberian Peninsula, nor that they have incorporated ancient Iberian horse genes into their genetic pool to a larger extent than other horse breeds.     

高等学校举办干部教育的师资问题与对策

高等学校举办干部教育培训，主要依靠普通高等教育的教师，特色鲜明，优势明显，但也存在一些问题。教师是教育质量的保障，提高高等学校干部教育工作的质量，就必须抓好教师队伍的建设，以增强干部教育的生命力。     

The role of wildlife tourism in conservation of endangered species: Implications of safari tourism for conservation of the Arctic fox in Sweden

There are both positive and negative impacts on wildlife associated with wildlife tourism. In Sweden, the endangered Arctic fox is subject to a growing tourist interest. In the Helags mountain region there are guided Arctic fox safari tours that provide visitors with information about the Arctic fox. A survey of five separate groups of visitors in the region revealed that knowledge about the status of Arctic foxes and awareness of the behavioral guidelines for Arctic fox encounters improved after participation in a safari tour and with increasing Arctic fox interaction. We propose a schematic model summarizing the diverse ways in which wildlife tourism affects wildlife and their relative importance for conservation. The Arctic fox population in Sweden is small and sensitive to disturbance, but the positive impacts of Arctic fox tourism seem to compensate for the negative and contribute to their conservation under the current level of tourism pressure.     

森林可持续经营的重要保障———森林资源综合监测探讨

本文从森林可持续经营的概念和内涵入手,阐述了森林可持续经营与森林资源综合监测的辨证关系,总结分析了国内外森林资源监测体系的现状及发展趋势。文章指出,森林可持续经营丰富了森林资源综合监测的目标,森林资源综合监测是森林可持续经营的重要保障,是森林可持续经营指标获取的重要途径。近年来,先进国家森林资源监测己经向着资源和环境监测一体化的综合监测方向发展。在监测内容方面. 除传统的森林生长指标外. 增加了森林健康状况和重要生态环境因子。在监测手段上采用成套的先进仪器设备. 实现了对森林资源和重要生态因子的连续观测和     

井冈山及周边地区有机农业的发展

有机农业是新世纪世界农业发展的重要方向之一,也是中国新时期农业发展的重要模式之一。井冈山及周边地区（包括井冈山市和莲花县、永新县、泰和县、遂川县、炎陵县、茶陵县）具有得天独厚的自然条件和生态环境优势,适宜发展有机农业。在对井冈山及周边地区发展有机农业的优势进行分析的基础上,以遂川县有机茶为例,重点分析了发展有机农业取得的实际成效;接着,指出了井冈山及周边地区发展有机农业存在的主要问题;最后,提出了该地区新世纪新时期发展有机农业的对策和措施。全文对山区有机农业的发展具有一定的指导意义和参考价值。     

湛江市古树名木资源的统计与分析

通过统计湛江市区内古树名木的分布位置、树龄、树高、冠幅、胸径等参数,分析该地区古树名木的生长规律和影响因素,并探讨有效的管养方法和保护措施,为今后使用古树名木地理信息系统实时监测其健康状况提供依据。     

基于极大熵原理的水资源承载力模糊评价

区域水资源承载力是近些年来水科学领域研究的热点问题,根据信息论中Jaynes最大信息熵原理,提出了一种水资源承载力模糊评价模型,并将其应用到河南省水资源承载力评价中,结果表明,河南省绝大多数地区水资源承载力较低,水资源的开发利用应以可持续发展为基础,采用节约用水,加强管理等措施。