广东封开黑石顶一种亚热带常绿阔叶林群落演替动态研究

运用Ｗ．比特利希的可变样圆半径的角规标准地法，在广东封开黑石顶自然保护区选择一种亚热带常绿阔叶林群落，随机布设２０个可变半径为５０Ｄ（Ｄ为林木胸径）的调查样圆。调查研究该群落的植物区系及各个树种的密度、相对密度、频度、相对频度、显著度、相对显著度及重要值并据此确定群落的优势及亚优势种；运用分层株数及频度的方法思想把群落按树种分为下层：Ⅰ层，１０ｍ以下；Ⅱ层，１０—２０ｍ；Ⅲ层，２０ｍ以上。根据同一树种在以上三层中频度和株数的变化规律及该树种的生态学和生物学特性，初步把该群落的主要树种划分为四种类型：衰退型：如马尾松、福建青冈、米椎；进展型：如黄果厚壳桂、红鳞蒲桃、显脉新木姜；稳定型：如绒英红豆、短花序楠；待变型：如小硬叶楠、铁榄等。应用分层频度（株数）法不仅可以预测某一植物群落区系的未来群落优势种，及未来群落上层树种的结构动态，还可以作为群落是否达到顶极状态的一项数量判别方法。     

江苏人造板工业发展趋势预测与分析

在概述江苏人造板工业发展状况和发展环境的基础上。建立了江苏人造板生产量的因果预测模型，对江苏人造板工业的生产产量和产品结构进行了预测和分析，并就实现江苏人造板工业的稳步发展提出了切实可行的建议。     

柞蚕幼虫酯酶同工酶的组织器官及发育时期特异性

应用聚丙烯酰胺凝胶电泳方法,对柞蚕不同发育时期及不同组织器官酯酶同工酶的特异性进行了研究,结果表明:柞蚕酯酶同工酶在柞蚕幼虫不同组织器官中的活性及种类差异很大,丝腺中无酯酶存在或者活性极低;血淋巴和马氏管中有少量酯酶存在,但活性较弱;酯酶在柞蚕脂肪体及中肠组织中有强的活性,并且同工酶种类较多。酯酶同工酶在柞蚕幼虫不同发育时期其活性和同工酶带数量上有一定的特异性,但主带迁移率相同。     

现代生态农业产业的若干思考

阐述现代生态农业产业必要性,并结合现代生态农业产业现状做出相应思考,对存在的种种问题进行探析。     

种业新政下着力提升河南省种企发展的若干思考

文章在充分认识当前我国种业新政和现代种业发展形势的基础上,对河南省种子企业发展存在的主要问题进行了较为详尽的分析和阐述,并提出应从改革完善种业创新体制、扶持"育繁推一体化"优势企业、加大政策保障支持力度、加强种子市场监督管理及人才队伍建设等方面着力提升河南省种子企业发展的思路和建议,以期为推动河南省乃至全国种业的发展提供一定的参考依据。     

农业科研档案管理中存在的问题及其解决对策

农业科研档案管理是现代科研管理工作的重要组成部分,是农业科研活动的重要环节。随着国家对农业科技体制改革的不断深化,农业科研档案收集、归档、流向等管理工作出现了新的问题。分析了当前我国农业科研档案管理中存在的问题及其原因,并提出了农业科研档案管理的创新思路。     

探析高职高专图书馆读者服务工作

高职高专图书馆是完成学校教学任务和实现学校总体目标的重要机构。目前,高校图书馆正向着从优化资源建设结构、整合文献资源、构建公共服务平台、扩大文献信息服务能力、提升高数图项目建设效益、构建学校文献保障体系、服务地方经济文化建设等方面发展,对图书馆读者服务的要求越来越高。针对如何做好高职高专学校图书馆读者服务,提出一些自己的思考及建议。     

西安世界园艺博览会深圳展园建设探讨

分析了西安世界园艺博览会深圳展园中"小小折纸廊,情影深圳事"的主题,探讨了通过高与低、内与外、开与合的空间艺术形式,运用剪影、漏空、彩绘等多种处理方法,以折纸廊为核心,将建筑、水体、植物和小品等元素融为一体,营造了特有的岭南都市风貌,充分展示了深圳展园所赋予的时代意义。     

Assessment of the welfare of working horses, mules and donkeys, using health and behaviour parameters

Working animals provide an essential transport resource in developing countries worldwide. Many of these animals are owned by poor people and work in harsh environments, so their welfare is a cause for concern. A protocol was developed to assess the welfare of working horses, mules and donkeys in urban and peri-urban areas, using direct observation of health and behaviour parameters. In this study, 4903 animals used for draught, pack and ridden work in Afghanistan, Egypt, India, Jordan and Pakistan were assessed between December 2002 and April 2003. The data showed that donkeys were more likely than mules or horses to demonstrate avoidance or aggressive behaviour towards an observer, while horses were most likely to make a friendly approach. Fewer than 8% of working equines had abnormal mucous membranes, ectoparasites or poor coat condition. Body lesions occurred predominantly in the areas of the breast/shoulder, withers and girth in all three species, with mules having the highest prevalence of lesions in these areas (22.5, 21.3 and 28.4%, respectively). Among horses and donkeys, the prevalence of these lesions was influenced by the type of work carried out. Lesions on the head, neck, ribs, flank and tail base were seen in less than 10% of animals. Across all three species approximately 70% of animals were thin, having a body condition score (BCS) of 2 or less on a scale of 1–5 (1, very thin; 5, very fat) and more horses were in very thin condition (BCS 1) than mules or donkeys. Over 75% of animals demonstrated limb deformities and abnormalities of gait. The results of this study are being used as the initial stage of a long-term strategy to inform priorities for welfare interventions in working equines and to establish a welfare benchmark. Subsequent stages will rank the welfare concerns identified, assess the contributing risk factors and implement specific interventions to address these risks. Following intervention, success in improving welfare will be measured by repetition of this protocol and comparison with the benchmark.