一种甜瓜新症状病害的病原鉴定及其生物学特性

2018年在北京通州试验基地的一温室内发生一种甜瓜新症状病害,为了能够有效地控制该病害,采集典型发病植株进行病原菌分离纯化,测定其致病性;利用形态学特征和rDNA ITS序列分析法鉴定该病原菌种类,并测定其部分生物学特性。结果表明,该病原菌为尖孢镰刀菌甜瓜专化型Fusarium oxysporum f.sp melonis。该病原菌在查彼克培养基(Czapek)上生长最快,最适生长温度为25~30℃,比较适合的碳源为甘露醇、麦芽糖和葡萄糖,比较适合的氮源为酵母浸膏。该病原菌对光照不敏感,菌丝致死温度为68℃下10 min。通过分析病害的发生特点,推测这种病害初侵染源可能是种子携带的病原菌。     

新型吸水剂在砂姜黑土甘蓝包菜上应用效果

研究了一种新型吸水剂在砂姜黑土应用效果。结果表明：新型吸水剂对生长初期甘蓝包菜生长有一定的抑制作用,但随着水分胁迫增加,吸水剂保水效果的发挥,包菜的生长很快恢复,到收获期,包菜产量,水分利用效率,土壤保水能力都显著高于对照处理。吸水剂以深施效果最好,增产率达15.5%,水分利用效率提高48.3%,供试的吸水剂在抗旱节水上有很好的应用前景。     

玉米新品种浚单22不同密度对产量的影响

为探讨玉米新品种浚单22获得高产的适宜种植密度，河南省浚县农业科学研究所对浚单22进行了5个处理的密度试验。试验结果表明：在5个试验处理的栽培密度中，以6．00万株／hm^2产量最高，其次为6．75万株／hm^2和5．25万株／hm^2，适宜种植密度为5．25万～6．75万株／hm^2。     

Making Asian students,making students Asian: The racialisation of export education in Auckland,New Zealand

Abstract: In recent years, international education has become a source of considerable political, academic and media debate in New Zealand. This is nowhere more the case than with regards to Auckland, the New Zealand city that has hosted the greatest number of international students. This paper focuses on the media debates around international students in Auckland with particular emphasis on the representations of the largest group of international students, those who originate from countries within the North‐East Asian region. The media representations of these students have fixed a diverse group of individuals within a singular racial identity that is known by stereotypical economic, cultural and social characteristics. As a result, these representations have further problematised the interaction between international students and the host population in Auckland while simultaneously implicating a cohort of young New Zealand citizens and permanent residents who are of similar descent within the same discourses. This process of othering the Asian student, regardless of citizenship, has consequences not simply for the practice of exporting education in this city but also for the future of a multicultural Auckland and New Zealand.     

甜玉米新种质生化成分的分析

以我国自己转育成的甜玉米新种南材料，研究甜玉米的生化成分，优势率和遗传控制，研究结果表明，（１）甜玉米新质各种生化成分与原始基因型接近，营养价值高，食味品质好；（２）甜玉米品质性状优势率以负（向）优势为主，明显不同生长势性状的优势率；（３）普甜，甜脆，超甜玉米籽粒外观性状和糖分含量均受其各自的一对隐性基因控制。     

韩国“新村运动”经验及其对中国新农村建设的启示

简要介绍了韩国“新村运动”的发展历程和取得的成就；概述了韩国“新村运动”把农民的思想启蒙作为起点、农村经济发展作为目标的成功经验；分析总结了韩国“新村运动”对中国新农村建设的启示；结合“十一五”规划纲要和2006年中央一号文件精神，指出在中国社会主义新农村建设过程中，要尊重农民意愿、培养有创业本领的新型农民、解决新农村建设的资金来源问题、做到科学合理规划、完善乡村自理和村民自治机制。     

香菇新品种L934和L937的培育

用香菇Ｌ８６７与Ｃｒ０４两品种单核菌丝体配对杂交，培育出Ｌ９３４；用香菇Ｌ３３与Ｃｒ０４两品种单核菌丝体配对杂交，培育出Ｌ９３７。拮抗实验和酯酶同工酶实验完全证实与它们与杂交亲本的不同，从而确认Ｌ９３４和Ｌ９３７为两个各自独立的香菇新品种。     

新时期稳定高校管理队伍的几点思考

2007年被教育部定为“高等学校管理年”,管理出质量,管理出效益。一流的大学必须要有一流的管理,建设一支稳定、精干、高效的管理队伍对高校的改革和长远发展至关重要。重视和解决目前高校管理队伍中存在的种种问题,努力构建和稳定一支高素质的管理队伍,是高校可持续发展的必然要求。     

Of Harold and Chimbu revisited

Abstract: This paper discusses my collaboration with Harold Brookfield in the study of Chimbu land and society. We began in 1958 at the Australian National University and worked together until 1965 in joint fieldwork and writing, and then collaborated occasionally after that. It began both of our professional contributions that continued throughout our professional careers. The work could never have been done by one person, either geographer or anthropologist. Our joint paper of 1990 may be the only multigenerational land study in anthropology/geography. Our long‐term study of the Mintima area is a constant reminder of the hazards of short‐sighted development projections. Brookfield always knew what he wanted to find out, and always constructed original methods of research and analysis. The Chimbu–Mintima maps were redrawn many times with many different measuring methods, new air photography and increasing precision. He always connected any specific study and report of work to general theory and would compare a wide range of related findings in other places. His work is a model of scientific method and its place in geographical theory.     

利用太谷显性雄性核不育基因Tal选育小麦新品种初报

太谷雄性不育基因Tal,是小麦遗传改良极为有用的工具,利用它特别适于多亲本聚合杂交和轮回选择育种。经过几年的研究,已初步育成一批各具特色的优良新品种和新种质。通过抗赤霉病基因库建拓育成了长江8809、长江8863、TFSL037、长江8807、长江8810、长江8862等,产量比对照扬麦5号增产或相当,抗赤、抗锈性明显优于扬麦5号,对赤霉病抗扩展性达抗病(R)级,大多对白粉病、纹枯病及湿害还兼具较好抗耐性,株高80～90cm,抗性与丰产,矮秆结合较好。经复合杂交育成的长江8877(红壳)和长江8877(白壳)平均亩产400公斤左右,比扬麦5号增产100公斤左右,籽粒白皮,容重较高。通过简单杂交育成的长江8802、长江8853和长江8897,各具特异优良性状。长江8802白皮抗穗发芽,长江8853早熟优质,长江8897特早熟大穗大粒,品质好。