农业生态系统的人类生态学分析模式探讨

农业生态系统的人类生态学分析模式探讨李季（北京农业大学农业生态环境科学系,１０００９４）ＡｎＡｎａｌｙｔｉｃａｌＭｏｄｅｌｏｆＡｇｒｏｅｃｏｓｙｓｔｅｍｆｒｏｍＨｕｍａｎＥｃｏｌｏｇｙＰｅｒｓｐｅｃｔｉｖｅ￥．ＬｉＪｉ（ＤｅｐａｒｔｍｅｎｔｏｆＥｃｏｌｏｇｙａｎｄＥｎｖｉｒｏｎｍｅｎｔａｌＳｃｉｅｎｃｅｓ,ＢｅｉｊｉｎｇＡｇｒｉｃｕｌｔｕｒａｌＵｎｉｖｅｒｓｉｔｙ１０００９４）．ＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＥｃｏｌｏｇｙ,１９９３,１２（２）：２３－２４．Ｂａｓｅｄｏｎｔｈｅａｎａｌｙｓｉｓｏｆｏｕｒｃｕｒｒｅｎｔａｇｒｏ－ｅｃｏｌｏｇｉｃａｌｒｃｓｅａｒｃｈ,ａｎｅｗａｎａｌｙｔｉｃａｌｍｏｄｅｌｏｆａｇｒｏ－ｅｃｏｓｙｓｔｅｍｋｅｓｔａｂｌｉｓｈｅｄａｎｄｔｈｅｃｏｎｔｅｎｔｓｏｆｉｔｓｒｅｓｅａｒｃｈａｒｅｒｅｓｔｒｕｃｔｕｒｅｄ．Ｔｈｅａｉｍｏｆｔｈｅｓｅｉｓｔｏｐｒｏｖｉｄｅａｍｏｄｅｌｆｏｒｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｒｅｇｉｏｎａｌａｇｒｉｃｕｌｔｕｒｅ,ｗｈｉｃｈｃａｎｎｏｔｏｎｌｙｅｘｐａｎｄｔｈｅｃｕｒｒｅｎｔｒｅｌａｔｅｄｔｈｅｏｒｉｅｓａｎｄｍｅｔｈｏｄｏｌｏｇｉｅｓ,ｂｕｔ     

Factors Affecting Electro－Fusion and Electro－Activation In Serial Nuclear Transplantation In Goat（Carpa hircus） Embryo

ＦａｃｔｏｒｓＡｆｆｅｃｔｉｎｇＥｌｅｃｔｒｏ－ＦｕｓｉｏｎａｎｄＥｌｅｃｔｒｏ－ＡｃｔｉｖａｔｉｏｎＩｎＳｅｒｉａｌＮｕｃｌｅａｒＴｒａｎｓｐｌａｎｔａｔｉｏｎＩｎＧｏａｔ（Ｃａｒｐａｈｉｒｃｕｓ）ＥｍｂｒｙｏＷＡＮＧＹｕ－ｇｅ（王玉阁）;ＺＯＵＸ...     

生态农业与乡村经济持续发展

生态农业与乡村经济持续发展张壬午,计文瑛,孙鸿良（天津农业部环境保护研究所,３００１９１）（中国农科院,北京１０００８１）ＥｃｏｌｏｇｉｃａｌＡｇｒｉｃｕｌｔｕｒｅａｎｄＳｕｓｔａｉｎａｂｌｅＤｅｖｅｌｏｐｍｅｎｔｏｆＲｕｒａｌＥｃｏｎｏｍｙ￥．ＺｈａｎｇＲｅｎｗｕ;ＪｉＷｅｎｙｉｎｇ（Ａｇｒｏ－ｅｎｖｉｒｏｎｍｅｎｔＰｒｏｔｅｃｌｉｏｎＩｎｓｔｉｔｕｔｅ,Ｔｉａｎｊｉｎ３００１９１）,ＳｕｎＨｏｎｇｌｉａｎｇ（ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＡｇｒｉｃｕｌｔｕｒａｌＳｃｉｅｎｃｃｓ,Ｂｅｉｊｉｎｇ１０００８１）．ＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＥｃｏｌｏｇｙ,１９９３,１２（２）：１９—２０．ＴｈｉｓｐａｐｅｒｂｒｉｅｆｌｙｐｒｅｓｅｎｔｓｔｈｅｃｕｒｒｅｎｔｄｅｖｅｌｏｐｍｅｎｔｏｆｅｃｏｌｏｇｉｃａｌａｇｒｉｃｕｌｔｕｒｅｉｎＣｈｉｎａａｎｄｃｏｍｐａｒｅｓｗｉｔｈｔｈｅ＇＇ｓｕｓｔａｉｎａｂｌｅａｇｒｉｃｕｌｔｕｒｅａｎｄｒｕｒａｌｄｅｖｅｌｏｐｍｅｎｔ＇＇（ＳＡＲＤ）ｐｕｔｆｏｒｗａｒｄｂｙＦＡＯ,Ｃｈｉｎａ’ｓｓｕｓｔａｉｎａｂｌｅａ－ｇｒｉｃｕｌｔｕｒｅｉｓｎｏｔｏｎｌｙａｎｉｎｇｅｎｉｏｕｓ     

真核生物中的微卫星及其应用

真核生物中的微卫星及其应用何平（中国科学院遗传研究所,北京１００１０１）Ａｂｕｎｄａｎｃｅ,ＰｏｌｙｍｏｒｐｈｉｓｍａｎｄＡｐｐｌｉｃａｔｉｏｎｓｏｆＭｉｃｒｏｓａｔｅｌｉｔｅｉｎＥｕｋａｒｙｏｔｅＨＥＰｉｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＧｅｎｅｔｉｃｓ...     

景观生态学中的文化研究

景观生态学中的文化研究李团胜（中国科学院沈阳应用生态研究所,１１００１５）ＲｅｓｅａｒｃｈｏｎＣｕｌｔｕｒｅｉｎＬａｎｄｓｃａｐｅＥｃｏｌｏｇｙ．ＬｉＴｕａｎｓｈｅｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＡｐｐｌｉｅｄＥｃｏｌｏｇｙ,Ａ－ｃａｄｅｍｉａＳｉｎｉｃ...     

应用生态学报第5卷（1994）关键词索引

应用生态学报第５卷（１９９４）关键词索引ＣＨＩＮＥＳＥＪＯＵＲＮＡＬＯＦＡＰＰＬＩＥＤＥＣＯＬＯＧＹＶｏｌ．５（１９９４）ＫＥＹＷＯＲＤＩＮＤＥＸＡＡｃａｎｔｈｏｐａｎａｘｓｅｎｌｉｃｏｓｕｓｉｇｌｏｏ５（３）：２３７Ａｇｒｏｅｃｏｓｙｓｔｅｍ￥ｋ４...     

宁南山区灌溉农业立体复合种植生态系统生产力的研究

宁南山区灌溉农业立体复合种植生态系统生产力的研究杜守宇田恩平,王占山（宁夏农业技术推广总站,银川７５０００１）（固原县农业技术推广中心,７５６０００）ＳｔｕｄｙｏｎＰｒｏｄｕｃｔｉｖｉｔｙｏｆＩｒｒｉｇａｔｅｄＳｔｅｒｅｏｓｃｏｐｉｃＭｕｌｔｉｐｌｅ－ＣｒｏｐｐｉｎｇＥｃｏｓｙｓｔｅｍｓｉｎＭｏｕｎｔａｉｎｏｕｓＡｒｅａｏｆＳｏｕｔｈｅｒｎＮｉｎｇｘｉａ￥ＤｕＳｈｏｕｙｕ（ＣｅｌｌｅｒａｌＳｔａｔｉｏｎｏｆＡｇｒｉｃｕｌｔｕｒａｌＴｅｃｈｎｉｑｕｅＥｘｔｅｎｓｉｏｎｏｆＮｉｎｇｘｉａ,Ｙｉｎｃｈｕａｎ７５０００１）,ＴｉａｎＥｎｐｉｎｇ,ＷａｎｇＺｈａｎｓｈａｎ（ＡｇｒｉｃｕｌｔｕｒａｌＴｅｃｈｎｉｑｕｅＥｘｔｅｎｓｉｏｎＣｅｎｔｅｒｏｆＣｕｙｕａｎｃｏｕｎｔｙ,７５６０００）．ＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＥｃｏｌｏｇｙ,１９９３．１２（６）：１１－１６．ＴｈｅｖａｒｉｏｕｓｃｒｏｐｐｉｎｇｅｃｏｓｙｓｔｅｍｓａｒｅａｓｓｅｓｓｅｄｃｏｍｐｒｅｈｅｎｓｉｖｅｌｙｆｏｒｂｅｎｅｆｉｔｂｙｔｈｅａｎａｌｙｓｉｓｏｆＨｉｅｒａｒｃｈｉｃａｌｐｒｏｃｅｄｕｒｅａｎｄｔｈｅｅｘｐｅｃｔｅｄｂｅｎｅｆｉｃｉａｌｖａ     

EM（有效微生物群）的研究与应用

ＥＭ（有效微生物群）的研究与应用李维炯,倪永珍（北京农业大学１０００９４）ＥｆｆｅｃｔｉｖｅＭｉｃｒｏｏｒｇａｎｉｓｍｓＲｅｓｅａｒｃｈａｎｄＩｔｓＡｐｐｌｉｃａｔｉｏｎ￥,ＬｉＷｅｉｊｉｏｎｇ,ＮｉＹｏｎｇｚｈｅｎ（ＢｅｉｊｉｎｇＡｇｒｉｃｕｌｔｕ...     

云南锡兰莲属一新变种

云南锡兰莲属一新变种费勇（中国科学院昆明植物研究所，昆明６５０２０４）ＡＮＥＷＶＡＲＩＥＴＹＯＦＮＡＲＡＶＥＬＩＡＦＲＯＭＹＵＮＮＡＮＦｅｉＹｏｎｇ（ＫｕｎｍｉｎｇＩｎｓｔｉｔｕｔｅｏｆＢｏｔａｎｙ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ，...     

首届亚太地区生物工程与护坡大会暨展览在马尼拉召开

在国际侵蚀控制学会（ＩｎｔｅｒｎａｔｉｏｎａｌＥｒｏｓｉｏｎＣｏｎｔｒｏｌＡｓｏｃｉａｔｉｏｎ,ＩＥＣＡ）等国际机构的资助与倡导下,第一届亚太地区侵蚀控制与护坡生物工程大会暨展览（ＦｉｒｓｔＡｓｉａ－ＰａｃｉｆｉｃＣｏｎｆｅｒｅｎｃｅａｎｄＥｘｈｉｂ...     

Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis

It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.     

肝癌中HBV和HCV基因和抗原的分布及意义

采用原位分子杂交方法检测HCV RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细     

Selection with two alleles and complete dominance

For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment.