我国落叶松鞘蛾的研究概况及发展方向

本综述了近20年来有关我国落叶松鞘娥的分类学、发生规律、生态学、天敌、防治技术和种群综合管理的研究结果，指出了今后的研究重点和发展方向。     

保护地二氧化碳气体变化规律与调控

保护地二氧化碳气体变化规律与调控范开业，姚富国，林同学，周建全（山东省临沂市农业局经作站）深冬，早春在保护地内进行蔬菜的栽培．对供应淡季市场，丰富城乡“菜篮子”有着显著的经济效益和社会效益。但是此时外界气温低，为保温保护设施处于密闭状态，引起棚内二氧...     

羊驼的繁殖特性

本文主要介绍了特种经济动物———羊驼的生殖生理特点、繁殖特性 ,为我国今后羊驼养殖业的发展提供理论依据     

京郊农田防护林景观生态评价--以北京大兴县北藏乡为例

Based on theories of protective forests and landscape ecology, the reasonableness of structures and patterns of shelterbelt system at Beizang Town, Daxing County, Beijing were analyzed and assessed from the two scales of forest belts and networks, by integrating uses of field investigation, GIS and RS techniques. Results showed that the existent main belt (3-12 m in width) was too narrow, while the assistant belt (3-27.1 m in width) was too wide; the species composition of the existent shelterbelts was single, and the structures and patterns of the shelterbelt system were unreasonable. It is suggested that the structure of the main and the assistant belts should be changed, such as increasing the width of main belts, decreasing the width of assistant belt, and planting more mixed species, and the pattern with arbores in the middle and shrubs in the sides of belts could be taken into account. For the landscape structure of forest network after regenerating or reconstruction, the grid number of closed network should be 13 per km2 and the minimum number of belts should be 34 per km2, This study also testified that integrating GIS and remote technique with landscape ecology could provide an effective method for reasonable reconstruction of the structures and patterns of shelterbelts system.     

黄腹角雄在东北地区人工繁殖的初步探讨

１９９３—１９９５年，饲养一对黄腹角雉，于１９９４年５月产无精卵２枚；１９９５年４月产卵６枚，孵出黄腹角雉５只。本文对黄腹角雉的生活习性和饲养环境、产卵情况及电器孵化、人工育雏与饲料配方等均作了论述。     

高产棉花密矮群体株型及其同步技术研究

本文通过试验研究,围绕每公顷超1875kg皮棉的高产棉花的密矮群体株型,分析了高产棉花的产量结构,光合效应,成铃时空分布等综合指标及相关关系。讨论了密矮群体株型高产棉花的水肥运筹与生长发育;化学调控与密矮群体株型;促铃描施与开花成铃高峰;库源流等同步栽培技术。提出了增加化控,密矮群体,塑造株型,调整水肥,促进成铃同步栽培体系的核心内容。     

尿囊素对肥育猪的影响

尿囊素化学名称为（2，5—二氧代—4—咪唑烷基）脲，纯品为无味、无臭的白色结晶固体，对空气、光、热有很高的稳定性。在冷水中微溶，热水中溶解度显著增加，不溶于乙醇、氯仿和乙醚等有机溶剂。尿囊素是一种可用人工合成的天然产物。它不仅存在于细菌、真菌中，而且存在于许多高等植物如小麦胚芽、水稻、大豆根瘤以及雏菊根部等。它还以痕量形式存在于几乎所有哺乳动物的排泄物（如牛尿、狗尿等）中，并因最初发现于胎几尿囊液中而得名为尿囊素。由于尿囊素具有促进细胞增殖，加快组织再生以及消炎止痛等重要生理活性，加之有使用无毒害…     

丘陵沙地牧场防护林建设及效果初探

丘陵沙地牧场防护林建设及效果初探王庆基，范希利，王士明，刘起（赤峰市敖汉旗种羊场０２４３００）草牧场防护林对于改善生态环境、保护和恢复草场植被，提高生产力水平，均有十分重要的意义，因此日益受到社会广泛重视。自１９９０年敖汉种羊场在近万公顷丘陵沙地草场...     

金黄色葡球菌引起人畜中毒和感染病例

金黄色葡球菌引起人畜中毒和感染病例最近，海盐县某农户因违章私自宰卖病死母猪肉，引起多只猪感染发病和食物中毒的恶性事件，现报告如下：。１．发病情况１９９５年１０月，某农户饲养的１头母猪突然发病，濒死时私自放血宰杀，并于当日和次日将病猪肉在本地和邻县某村...