日本落叶松在滇东北造林适应范围分析

本文根据滇东北地区的气候特点以及土壤特点,结合日本落叶松的生物学特性,对其在滇东北造林的适应范围进行了分析,以期为日本落叶松在滇东北地区的造林栽培起到指导性作用。     

Spatial Autocorrelation Analysis on Regional Economic Disparity of Northeast Economic Region in China

Popular regional inequality indexes such as variation coefficient and Gini coefficient can only reveal overall inequality, and have limited ability in revealing spatial dependence or spatial agglomeration. Recently some methods of exploratory spatial data analysis such as spatial autocorrelation have provided effective tools to analyze spatial agglomeration and cluster, which can reveal the pattern of regional inequality. This article attempts to use spatial autocorrelation at county level to get refined spatial pattern of regional disparity in Chinese northeast economic region over 2000-2006 （2001 absent）. The result indicates that the basic trend of regional economy is an increasing concentration of growth among counties in northeast economic region, and there are two geographical clusters of poorer counties including the counties in western Liaoning Province and adjacent counties in Inner Mongolia, poorer counties of Heihe, Qiqihar and Suihua in Heilongjiang Province. This article also reveals that we can use the methods of exploratory spatial data analysis as the supplementary analysis methods in regional economic analysis.     

Joint effects of cadmium and lead on seedlings of four Chinese cabbagecultivars in northeastern China

In northeastern China, large area of vegetable land has been simultaneously polluted by cadmium (Cd) and lead (Pb). Joint e ectsof Cd and Pb on Chinese cabbage (Brassica pekinensis L.) were investigated using the seed germination and sand culture method.Four Chinese cabbage cultivars including Kangbingjinchun (KB), Dongyangchunxia (DY), Qinglvwang (QL) and Qiangshi (QS) fromShenyang in northeastern China were adopted in this study. The results showed that there were positive linear relationships betweenthe inhibitory rate of biomass, root and shoot elongation and the concentrations of Cd and Pb. In particular, root elongation was moresensitive to joint stress of Cd and Pb. The activity of superoxide dismutase and the content of malondialdehyde (MDA), soluble protein(SP) and proline (PRO) changed significantly with increasing exposure concentration of Cd and Pb. The decrement in the activity ofantioxidative enzymes, the content of SP and accumulation of MDA were relatively low in KB and QS. PRO played an important rolein resisting Cd and Pb stress.     

吉林珲春东北虎自然保护区现状调查及建议

保护区概况 吉林珲春东北虎自然保护区(以下简称保护区)是中国第一个国际濒危物种、国家一级重点保护野生动物东北虎、豹及其栖息为主要保护对象的自然保护区．具有珍稀性、濒危性和物种代表性等显特征．属野生动物类型。     

近四十年东北夏季低温冷害的气候特征

本文利用１９５１－１９９０年５－９月月平均气温计算东北三省５１个站的夏季低温冷害频率和严重低温冷害频率。其频率随纬度的增高而增大，山区频率比同纬度的平原地区大。     

青龙县：扎实开展生态环境监察工作

青龙满族自治县位于河北省东北部,县域内桃林口水库是秦皇岛、唐山两市重要饮用水源地,老岭是市级自然保护区、国家地质公园。2008年青龙满族自治县被列为全省生态监察试点县。     

加强全社会防范意识,落实防火安全责任制——访北京市公安局消防局局长赵子新

采访北京市公安局消防局赵子新局长,是一件很快乐的事,他的睿智、机敏,用略带东北方言的幽默表达出来,清晰的思路,深刻的道理,使你能很轻松的去感受他的思想,体会他的快乐和痛苦.     

东北漫岗区村落的分布特征分析

对黑龙江省绥化市的6个村落、九三垦区鹤山农场的8个村落和嫩江县双山镇的蔡窑村进行实地考察。依据鹤山农场1980-1995年气温、日照时数、风速、降水量和≥5级风日数的气象资料,同时考虑到地形、土壤等因素,分析了东北漫岗区村落分布的特征,即：日照和太阳辐射影响了村落分布的坡向,就不同坡向而言,村落分布数量大小顺序为：东南坡、西南坡、东北坡、西北坡;风影响室温,并可能对房屋造成破坏,故大部分村落分布在坡中部以下;降水量和土壤特性决定了村落的分布下限;地理环境因素和人的选择性、能动性共同决定了东北漫岗区村落呈狭长形沿坡分布。     

中国东北区水资源量天然可再生能力分异及其对土地利用变化的响应

从水循环的角度对水资源的可再生能力进行表征 ,并在GIS技术支持下 ,对中国东北区天然水资源量可再生能力时空分异进行了系统剖析 ;并结合东北区 1986～2000年间的土地利用变化 ,揭示了东北区天然水资源可再生能力分异对土地利用变化的响应 .1956～2001年间 ,东北区多年平均水资源量为 1991.52亿m³,具有显著的时空变化特征 ;且水资源变化具有33a、11a和 4a周期 .1980～2001年间 ,东北区水资源可再生能力呈现出下降趋势 ,下降幅度和年际间的变化强度具有显著的空间分异特征 .水资源可再生能力与土地利用的耦合变化表明 ,需在分布式生态 水文机理剖析的基础上 ,对中国东北区的土地利用格局进行科学调整 ,以使得在人类活动剧烈干扰的环境背景下 ,水资源的可再生能力仍能维持在一个较高的水平上 .     

滇东北山原土地资源的可持续利用─—以会泽县为例

滇东北山原区是云南省的区域性贫困区．该区以山地为主．自然条件垂直差异大、土地资源质量较差、管理上存在问题多．本文以会泽县为例,对该区土地资源的持续利用进行了探讨．