Using ~(137)Cs tracing technique to estimate wind erosion rates in the typical steppe region, northern Mongolian Plateau

Wind erosion is one of the major factors of land degradation in the typical steppe region, northern Mongolian Plateau. Using 137Cs tracing technique, we estimated the wind erosion rates of different pastures and abandoned farmland at Bayannur and Karakorum in Mongolia. The pastures and cutting grassland at Bayannur were slightly eroded by wind, with the rates of 64.58-169.07 t·km?2·a?1. The abandoned farmland in Karakorum, however, was strongly eroded by wind, with annual surface soil loss of 4.05 mm·a?1, and wind erosion rates up to 6723.06 t·km?2·a?1. The total loss of surface soil due to wind erosion has been 17.4 cm since the cultivation of the steppe land in the 1960s. The wind ero- sion rate at the abandoned farmland was much higher than that at the typical steppe sites, showing that the cultivation led to serious wind erosion in the typical steppe region, northern Mongolian Plateau. By contrast, traditional livestock grazing resulted in less disturbance to the surface soil, and did not in- duce to devastating wind erosion, which plays an important role in maintaining the stability of the steppe ecosystem in the northern Mongolian Plateau.     

Estimation of wind erosion rates by using ~(137)Cs tracing technique:A case study in Tariat-Xilin Gol transect, Mongolian Plateau

Wind erosion is one of the major environmental problems in semi-arid and arid regions. Here we es- tablished the Tariat-Xilin Gol transect from northwest to southeast across the Mongolian Plateau, and selected seven sampling sites along the transect. We then estimated the soil wind erosion rates by using the ~(137)Cs tracing technique and examined their spatial dynamics. Our results showed that the ~(137)Cs inventories of sampling sites ranged from 265.63±44.91 to 1279.54±166.53 Bq·m~(-2), and the wind erosion rates varied from 64.58 to 419.63 t·km~(-2)·a~(-1) accordingly. In the Mongolia section of the transect (from Tariat to Sainshand), the wind erosion rate increased gradually with vegetation type and climatic regimes; the wind erosion process was controlled by physical factors such as annual precipitation and vegetation coverage, etc., and the impact of human activities was negligible. While in the China section of the transect (Inner Mongolia), the wind erosion rates of Xilin Hot and Zhengxiangbai Banner were thrice as much as those of Bayannur of Mongolia, although these three sites were all dominated by typical steppe. Besides the physical factors, higher population density and livestock carrying level should be responsible for the higher wind erosion rates in these two regions of Inner Mongolia.     

长爪沙鼠1～5号染色体G显带特征初步研究

目的　通过易于区分的 1～ 5号长爪沙鼠染色体G显带特性研究 ,逐步建立完整的长爪沙鼠G带染色体细胞遗传学背景资料。方法　取 6只成熟长爪沙鼠 ,雌雄各半 ,采用外周血进行淋巴细胞培养 ,获得分裂中期细胞染色体标本制片 ,以胰蛋白酶处理 ,选 1周龄标本染色观察。结果　长爪沙鼠染色体指数表明 ,1～ 5号染色体以相对长度、着丝点位置易于排列。 1号染色体与 2号染色体各有八条深染带纹 ,可以着丝点位置加以区分。 3号染色体有六条深染带纹 ,位于着丝点附近和长臂与短臂中部无穷侧端。 4号染色体与 5号染邑体均有四条深染带 ,5号染色体短臂深染带纹位于着丝点一侧可予以区分。结论　长爪沙鼠 1～ 5号染色体有较稳定的基本深染G带型 ,可做为染色体区带划分的重要标界。     

基于词汇的蒙古语文语转换的实验

蒙古语是一种很有影响的语言,较放西有许多独特的方面,本介绍了一个基于词汇的蒙古语语转换系统的设计与实现。     

浅谈蒙古文网站现状及发展趋势

本文主要介绍蒙古文网站概况、带来的影响和利用现状等方面。结合已有研究视角、方法及关注焦点,文中提出网站建设当中存在的问题和解决思路,并展望蒙古文网站的发展趋势。     

蒙古族男子优秀搏克运动员身体成分分析

选取21名蒙古族国家健将级和国家一级男子博克运动员,采用PLUSⅡ体成分分析仪测试了运动员身体成分的重量和比例,分析了蒙古族搏克运动员身体成分的特点.结果显示:运动员体脂百分比与标准值之间没有显著差异;健将级运动员的身体质量指数显著高于一级运动员,其他指标没有显著差异;优秀搏克运动员身体肌肉量和身体充实度较高.     

展望蒙西医结合治疗糖尿病的前景

随着医学科学突飞猛进的发展,各个领域的合作、结合更为推动其发展起到举足轻重的作用.一直以来,我们在临床上探索和寻找蒙医药治疗糖尿病的有效方法,发现蒙西医结合治疗具有较好的效果.本文浅谈了糖尿病的西医药,蒙医药的治疗现状及蒙西医药结合治疗的特点,展望了我国蒙西医结合治疗糖尿病的前景.     

蒙药组方治疗慢阻肺的临床疗效比较

 为评价蒙药组方对慢性阻塞性肺疾病（慢阻肺）疗效,招募稳定期患者153例,94例给予布地奈德福莫特罗或茚达特罗格隆溴铵（西药组）,59例给予加味阿嘎日、赞丹-20、清肺润泽丸等（蒙药组）。治疗3个月,蒙、西药组肺功能和6 min步行试验（6MWT）结果无显著差异;圣乔治呼吸问卷（SQGR）症状评分组间差异显著（校正后P=0.021）。与基线相比,蒙药组慢阻肺评估测试（CAT）评分下降6分,显著高于西药组（校正后P<0.001）; CAT评分下降2分及以上比例与降低或不变比例显著高于西药组（P_△CAT≤-2=0.001,校正后P _{降低/不变}=0.035）;蒙药组SQGR疾病影响评分降低11.19分,西药组降低6.98分,蒙药组的下降值显著高于西药组（P=0.014）。证实了蒙药组方可显著缓解慢阻肺稳定期患者呼吸道症状,改善心肺功能。     

蒙文医学科普图书调查研究

为了解少数民族医学科普这一特殊领域,以蒙古文的医学科普图书作为案例,展开了此次调查。通过调查,分析总结了蒙文医学科普图书的现状、特征和问题,提出了作者对少数民族地区医学科普的看法,为少数民族科普工作的有效开展提供了可供借鉴的材料和依据。     

关于匈奴人种问题的几点认识

“中国北方长城地带”青铜时代居民的人类学资料表明。匈奴人的人种构成具有突出的地域性，不同地区的匈奴人基本延续了较早时期的人种类型。“中国北方长城地带”东周时期南下的牧人在人种类型上属于“古蒙古高原类型”，来源上应与蒙古高原以及外贝加尔石板墓的居民有一定的渊源关系。到战国晚期以后，当长城以北强大的匈奴联盟形成的时候，这部分古代居民很有可能最终加入到了匈奴联盟当中。