GIS在生态土地分类中的作用

This paper depicted the physiographic landscape features and natural vegetation situation of study area (the eastern Jilin Province), and expatiates the definition, basic characters and its development of Ecological Land Classification (ELC). Based on the combination of relief map, satellite photography for study area and vegetation inventory data of 480 sample sites, a 5-class and a 15-class ecological land type map was concluded according to 4 important factors including slope, aspect, vegetation and elevation. Ecological Classification System (ECS) is a method to identify, characterize, and map ecosystems. The Ecological Land Type (ELT) was examined and applied initially in eastern Jilin Province. Foundation item: This paper was supported by Chinese Academy of Sciences “100 people” project and the Open Research Station of Changbai Mountain Forest Ecosystem. Biography: XIAO Bao-ying (1974-), female, postgraduate in Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, P. R. China Responsible editor: Zhu Hong     

干番茄渣在蛋鸡饲料中的应用

本文旨在研究用干番茄渣（DTP）部分或全部替代大豆、玉米、小麦、麦麸饲料时，对蛋鸡生产性能、蛋品质的影响。将288只试验鸡（27—38周龄）随机分成4组，每组72只．分别为：DTP0（对照组）、DTP50、DTP100、DTP150（每吨饲料中分别含0、50、100、150kg DTP）。与对照组相比．DTP100组使其产蛋量、产蛋总重分别增加2．7％、4．1％．而鸡的体重、蛋重、日消耗饲料量、蛋壳重、蛋壳厚、哈夫单位、蛋黄颜色均与对照组相似。DTP150组使产蛋量、产蛋总重分别降低3．6％、3．0％，但饲料转化率增加2．9％。结果表明．DTP可以作为蛋鸡的饲料原料。     

Computationally Assisted Structural Elucidation of Cembranoids from the Soft Coral Sarcophyton tortuosum

A persistent study on soft coral Sarcophyton tortuosum resulted in the characterization of two new cembranolides, tortuolides A and B (1 and 2), and a new related diterpene, epi-sarcophytonolide Q. Their structures were determined not only by extensive spectroscopic analysis but also by DFT calculations of ECD and NMR data, the latter of which was combined with statistical analysis methods, e.g., DP4+ and J-DP4 approaches. Anti-inflammatory and cytotoxicity activities were evaluated in this study.     

Taxonomic and Bioactivity Characterizations of Mameliella alba Strain LZ-28 Isolated from Highly Toxic Marine Dinoflagellate Alexandrium catenella LZT09

Microalgae host varied microbial consortium harboring cross-kingdom interactions with fundamental ecological significance in aquatic ecosystems. Revealing the complex biofunctions of the cultivable bacteria of phycosphere microbiota is one vital basis for deeply understanding the mechanisms governing these dynamic associations. In this study, a new light-yellow pigmented bacterial strain LZ-28 was isolated from the highly-toxic and harmful algal bloom-forming dinoflagellate Alexandrium catenella LZT09. Collective phenotypic and genotypic profiles were obtained to confidently identify this strain as a new Mameliella alba member. Comparative genomic analysis showed that strain LZ-28 shared highly similar functional features with other four marine algae-derived M. alba strains in spite of their distinctive isolation sources. Based on the bioactivity assaying, the mutual growth-promoting effects between bacterial strain LZ-28 and algal strain LZT09 were observed. After the culture conditions were optimized, strain LZ-28 demonstrated an extraordinary production ability for its bioflocculanting exopolysaccharides (EPS). Moreover, the portions of two monosaccharides glucose and fucose of the EPS were found to positively contribute to the bioflocculanting capacity. Therefore, the present study sheds light on the similar genomic features among the selected M. alba strains, and it also reveals the potential pharmaceutical, environmental and biotechnological implications of active EPS produced by this new Mameliella alba strain LZ-28 recovered from toxic bloom-forming marine dinoflagellate.     

湘研十五号辣椒的选育

湘研十五号辣椒是以６４２４为母本,８２１５为父本配制一代杂种,植株生长势强,株型紧凑,丰产、稳产,抗病性强,一般６６７ｍ＾２产量３０００ｋｇ左右,比湘研五号增产１５．３６％。     

机插水稻栽培要点

水稻移栽实行机械化栽插是农业机械化种植的重要组成部分,具有省工、节本、增产、增效等优点,是一项新兴的轻型栽培技术。在夏收夏种季节有利于缓解劳力的矛盾,有利于种植业规模经营发展。机插秧同手插秧相比,播量大、秧龄短,可采用适龄小苗移栽。句容市自2003年大面积推广该技     

平顶山市农药经营、管理与使用现状调研与思考

为保障舌尖上的安全,农药是关键的农业投入品。本文通过基层调研,探索了目前平顶山市农药经营、管理与使用的现状、存在的问题,并深入思考,提出了取消农药专营,实行农药经营许可制度,修订完善法律法规,搞好经营者技术培训,构建诚信经营体系等建议,对指导平顶山市及全省农药经营市场管理有着积极的推动作用。     

高校根本的目标追求:大学生和谐人格培育

当代大学生是构建和谐社会的重要力量,其和谐人格的培育是和谐社会的必然要求,是现代高校思想政治教育的应有之意,也是大学生个体和谐发展的动力之源。高校应把培养大学生和谐人格作为高校根本的目标追求。高校领导、教师要确立和谐人格培育的新理念,加强大学生的人格践行教育,构建健康的校园核心价值观,注重大学生的个性教育,加强大学生个体的自我教育。     

外源油菜素甾酮处理水稻对褐飞虱取食和产卵选择性等行为的影响

为了解经油菜素甾酮处理后水稻对褐飞虱Nilaparvata lugens的抗性,通过在水稻培养液中添加不同浓度的油菜素甾酮,观察水稻对褐飞虱取食和产卵、若虫生长发育、羽化等行为的影响,评估油菜素甾酮在水稻抗虫防御反应中的作用。结果表明,水稻培养液中的油菜素甾酮可被水稻有效吸收并产生生理活性。经0.01～10μmol/L油菜素甾酮处理后水稻叶片弯曲程度均显著增加,其叶角分别为对照的3.3～11.0倍。褐飞虱取食和产卵嗜好性与油菜素甾酮处理浓度密切相关,经较低浓度0.005～0.05μmol/L油菜素甾酮处理的水稻能显著降低褐飞虱雌成虫的取食和产卵嗜好性,其产卵量为对照的35.0%～73.9%;而较高浓度0.1～5μmol/L油菜素甾酮处理则增加褐飞虱雌成虫的取食和产卵嗜好性,其产卵量为对照的1.3～1.8倍。0.01、1、5、10μmol/L油菜素甾酮处理的水稻显著降低褐飞虱若虫的羽化率,为对照的32.5%～53.3%。0.1～10μmol/L油菜素甾酮处理显著缩短褐飞虱若虫发育历期,仅为对照的94.1%～96.9%。褐飞虱若虫存活数和初羽化雌成虫体重分别仅在0.1、10μmol/L油菜素甾酮处理下显著降低。表明油菜素甾酮处理水稻可对水稻抗虫防御反应产生影响,其具有作为生态功能分子用于褐飞虱田间防控的潜力。