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。     

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...     

乳品行业进入品牌营销时代

近两年来，我国乳品行业正以１０％以上的速度快速增长而成为农产品发展中罕见的现象。截至目前，全国奶牛存栏５６６万头，奶类总产量达到１１２２万t。至今，世界排名前２０位的乳业巨头都已进入我国奶业市场，其中瑞士雀巢、日本森永、意大利帕玛拉特等巨头企业还在我国建立了生产基地。有关专家指出，到２００５年左右，我国乳品市场将被基本分割完毕，如果在这轮分割中本土乳品企业不能占到较大份额，今后就很难挤进我国乳品企业的前列。中国农业大学动物科技学院李胜利博士认为，现阶段我国乳品行业已进入品牌营销时代，在经过一轮优…     

贵阳地区大棚延秋番茄高效栽培技术

10月以后,贵阳地区气温低、多雨、日照少,不宜进行秋冬季大棚喜温蔬菜生产栽培,通过引进优良番茄品种,采用连续摘心整枝技术,进行大棚延秋番茄栽培,产量高,市场价格好,有较高的经济效益和社会效益。