蒙古族高血压患者血管紧张素的变化及意义

目的探讨蒙古族高血压患者血管紧张素水平的民族差异性,为蒙古族高血压患者制订更有针对性的防治措施提供依据。方法收集蒙古族和汉族高血压患者、血压正常高值者、正常血压者各30例。各组研究对象分别检测血浆血管紧张素Ⅱ(AngⅡ)、血管紧张素(1-7)[Ang(1-7)]水平。结果各组间年龄、性别、体质指数等基本情况差异无统计学意义。(1)蒙古族与汉族AngⅡ水平均随血压升高而升高,Ang(1-7)水平随血压降低而降低。(2)蒙古族高血压组与汉族高血压组、蒙古族血压正常高值组与汉族血压正常高值组、蒙古族血压正常组与汉族血压正常组之间的AngⅡ、Ang(1-7)水平差异均有统计学意义(均为P<0.05)。蒙古族的AngⅡ水平高于汉族,蒙古族的Ang(1-7)水平低于汉族,差异均有统计学意义(均为P<0.05)。结论血管紧张素改变具有民族差异性,蒙古族人群与汉族人群相比较,在血压正常期血管紧张素水平已较高。

包头市618例牧区居民高血压主要危险因素分析

目的筛选蒙古族居民高血压的影响因素。方法将包头市九原区和达茂旗的12个苏木按经济状况分为上、中、下3层并随机抽出3个苏木进行调查,共618例有效资料,253例为原发性高血压(病例组),365例为血压正常者(对照组),采用Logistic回归分析法筛选牧区居民高血压影响因素;主成分分析法筛选各患者最主要的危险因素。结果年龄、高血压家族史、酒龄、饮盐茶频数、体质量指数(BMI)为牧区居民高血压的影响因素;病例组中以BMI因子,饮盐茶频数、年龄、酒龄因子,酒龄因子及高血压家族史因子为主要影响因素者分别为88、78、50及36例,另有1例BMI、年龄、酒龄均是其主要影响因素。结论牧区高血压患者应根据自己最主要的危险因素采取针对性措施控制血压。

Vegetation landscape structure and dynamics in sandy forest-steppe ecotone

Sandy forest-steppe ecotone in Baiyinaobao Natural Reserve of Inner Mongolia Autonomous Region of China is one of the special landscape types in forest-steppe vegetation zone in China. Vegetation landscape types, landscape patches, and patch size were measured by the field investigation, forest photograph, and airscape. The structure of landscape patches in sandy forest-steppe ecotone, including composition structure, and size structure, was studied and the dynamics and transformation of landscape patches were analyzed. The data obtained in this study could provide theoretical basis for the research on vegetation landscape in forest-steppe ecotones and other vegetation types.

Vegetation Traits and Soil Properties in Response to Utilization Patterns of Grassland in Hulun Buir City, Inner Mongolia, China

Numerous studies have focused on vegetation traits and soil properties in grassland, few of which concerned about effects of human utilization patterns on grassland yet. Thus, this study hypothesized that human disturbance(e.g., grazing, mowing and fencing) triggered significant variation of biomass partitioning and carbon reallocation. Besides, there existed some differences of species diversity and soil fertility. To address these hypotheses of grassland with diverse utilization patterns in Hulun Buir City, Inner Mongolia, China, we sampled in situ about aboveground biomass(AGB) and belowground biomass(BGB) to evaluate their biomass allocation. Species diversity and soil properties were also investigated. Subsequently, we discussed the relationship of species diversity with environmental conditions, using data collected from 23 sites during the ecological project period of Returning Grazing Lands to Grasslands(RGLG) program. The results were as follows: 1) both AGB and BGB were lower on grazing regime than those on fencing and mowing, but the ratio of root-to-shoot(R/S) was higher on grazing regime than the other two utilization patterns; 2) neither of evenness and Simpson Index was different significantly among all grassland utilization patterns in desert, typical, and meadow grassland at 0.05. In meadow grassland, species richness of fencing pattern was significantly higher than that of grazing pattern(p < 0.05); 3) both of soil organic carbon content and soil available phosphorous content were increased significantly on fencing pattern than grazing pattern(p < 0.05) in desert grassland, and mowing patterns increased the soil nutrients(soil organic carbon, soil total phosphorous, soil available phosphorous, and soil total nitrogen) significantly compared with grazing patterns(p < 0.05) in typical grassland. However, there were no significant differences among utilization patterns in meadow grassland. In conclusion, both of AGB and BGB were increased significantly by fencing. Moreover, species diversity and soil nutrients can be promoted via mowing and fencing. This study suggested that implementation of Ecological Project played a positive role in sustainable grassland utilization of Hulun Buir City and a strong positive influence on the entire temperate grassland.

Development, Institutional Changes, and the Power of Science in Baiyinxil Rangeland, IMAR

Field research in this paper was carried out in Baiyinxil State-owned Rangeland （SOR）, which is 55 kms southeast of Xilingol City in Xilingol League, Inner Mongolia Autonomous Region （IMAR）. The area established the first grassland nature reserve in China as well as the first SOR in IMAR. By reviewing its 60 years of development, the paper analyzes local herders＇ ecological ideology （the cycle made of human-grassland-livestock and none of which could be neglected） and the modern nation-state＇s policy implementation in ecological resettlement, institutional changes, and livestock cross-breeding. The purpose of the research is to discuss three pairs of socio-ecological relationships in Inner Mongolia grassland： between population flow and regional development, traditional ideology and grassland management ideology, as well as the competition between local knowledge and modern science and technology. The author argues that grassland management is a cyclical process and the deterioration of grassland ecology in IMAR is simply a reflection of the imbalance of three key elements （human-institution-cattle） in maintaining grassland ecology.

Maars in the Xilinhot-Abaga Volcanic Cluster

Located in Xilin Gol League of Inner Mongolia Autonomous Region,the Xilinhot-Abaga volcanic cluster is in the centre of the Daxing’anling-Datong volcanic eruption belt.More than 300 Quaternary basaltic volcanoes of different types are developed in the volcanic eruption belt.Maars are found for the first time in the study area,with those in Haotewula in the southeast of Abagaqi,and Chelewula and Esigewula in the northwest of Abagaqi to be the most representative.They all are large in scale,with cone diameters generally 3~4km,with the largest up to 6.5km.The maars show intact structure,a similar two-ringed mountain landscape and obviously phased eruption which contained a vigorous phreatomagmatic explosion at the earlier stage,and weak magmatic explosion at the later stage,and basaltic lava effusion in the last stage.The eruption sequence reflects the interaction between magma and water,the change of intrusive speed and outflow rate of magma.The Middle Pleistocene deposits of sand and gravel in the valley are covered by basal surge deposits.The TL age of sandstone-shale 'xenolith'which was found in the spatter deposits close to the crater is( 0.112 ± 0.0096) Ma,indicating that the eruption time of the Maars was the early Late Pleistocene.

The Effects of Eco-Compensation in the Farming-Pastoral Transitional Zone of Inner Mongolia,China

Ecological compensation or eco-compensation has been implemented mainly through institutional arrangement in China. In the farming-pastoral transitional zone of Inner Mongolia, eco-compensation has been implemented in two modes, one for land use abandonment and the other for productionstructure adjustment. Based on a detailed field survey, this study performs a comparative analysis of the willingness of households to accept economic compensation and consequently evaluates the effects of the two eco-compensation modes. The mode of eco-compensation for land use abandonment lacks a mechanism for generating employment opportunities and so is unsustainable. In contrast, ecocompensation for production-structure adjustment makes the pastoral and farming scales of households decrease significantly and most importantly helps to generate more job opportunities. Although this mode faces households with more market risk, it provides an effective means for resolving conflicts between ecosystems restoration and regional socio-economic development.

A NEW LACEWING FAMILY ( NEUROPTERA)FROM THE MIDDLE JURASSIC OF INNER MONGOLIA, CHINA

A new family, Grammolingiidae of fossil lacewings is erected, of which 3 new genera and 6 new species are described and illustrated: Grammolingia boi. gen. nov. et sp. nov., Litholingia rhora gen. nov. et sp. nov., Litholingia eumorpha gen. nov. et sp. nov. and Litholingia polychotoma gen. nov. et sp. nov., Leptolingia jurassica gen. nov. et sp. nov. and Leptolingia tianyiensis gen. noc. et sp. nov.. A key to genera within this new family is provided. All specimens described were collected from the Middle Jurassic Jiulongshan Formation of Eastern Inner Mongolia, China. The present discovery demonstrates that present knowledge of the Jurassic Neuropetra fauna remains very poor. The fossil specimens are deposited in Yizhou Fossil Museum and Department of Biology, Capital Normal University, respectively.

Spatial analysis and districting of the livestock and poultry breeding in China

The capacity of livestock breeding in China has increased rapidly since 1949, and the total output of meat, poultry and eggs maintains the world's top first in recent 20 years. Livestock emissions and pollution is closely associated with its population and spatial distribution. This paper aims to investigate the spatial patterns of livestock and poultry breeding in China. Using statistical yearbook and agricultural survey in 2007, the county-level populations of livestock and poultry are estimated as equivalent standardized pig index (ESP), per cultivated land pig index (PCLP) and per capita pig index (PCP). With the help of spatial data analysis (ESDA) tools in Geoda and ArcGIS software, especially the Moran's I and LISA statistics, the nationwide global and local clustering trends of the three indicators are examined respectively. The Moran's I and LISA analysis shows that ESP and PCP are significantly clustering both globally and locally. However, PCLP is clustering locally but not significant globally. Furthermore, the thematic map series (TMS) and related gravity centers curve (GCC) are introduced to explore the spatial patterns of livestock and poultry in China. The indicators are classified into 16 levels, and the GCCs for the three indicators from level 1 to 16 are discussed in detail. For districting purpose, each interval between gravity centers of near levels for all the three indicators is calculated, and the districting types of each indicator are obtained by merging adjacent levels. The districting analysis for the three indicators shows that there exists a potential uniform districting scheme for China's livestock and poultry breeding. As a result, the China's livestock and poultry breeding would be classified into eight types: extremely sparse region, sparse region, relatively sparse region, normally sparse region, normal region, relatively concentrated region, concentrated region and highly concentrated region. It is also found that there exists a clear demarcation line between the concentrated and the sparse regions. The line starts from the county boundary between Xin Barag Left Banner and Xin Barag Right Banner, Inner Mongolia Autonomous Region to the west coast of Dongfang County, Hainan Province.