Woody species diversity in temperate Andean forests: The need for new conservation strategies

Chile has more than half of the temperate forests in the southern hemisphere. These have been included among the most threatened eco-regions in the world, because of the high degree of endemism and presence of monotypic genera. In this study, we develop empirical models to investigate present and future spatial patterns of woody species richness in temperate forests in south-central Chile. Our aims are both to increase understanding of species richness patterns in such forests and to develop recommendations for forest conservation strategies. Our data were obtained at multiple spatial scales, including field sampling, climate, elevation and topography data, and land-cover and spectrally derived variables from satellite sensor imagery. Climatic and land-cover variables most effectively accounted for tree species richness variability, while only weak relationships were found between explanatory variables and shrub species richness. The best models were used to obtain prediction maps of tree species richness for 2050, using data from the Hadley Centre’s HadCM3 model. Current protected areas are located far from the areas of highest tree conservation value and our models suggest this trend will continue. We therefore suggest that current conservation strategies are insufficient, a trend likely to be repeated across many other areas. We propose the current network of protected areas should be increased, prioritizing sites of both current and future importance to increase the effectiveness of the national protected areas system. In this way, target sites for conservation can also be chosen to bring other benefits, such as improved water supply to populated areas.     

青海省藏区蕨麻的开发与利用

青海省藏区的蕨麻既是一种常用藏药,又是一种保健食品.现通过分析蕨麻的形态特征、生长习性、药理作用等,进一步认识其药用及食用价值,从而探究其开发状况及发展前景.     

安徽省欠发达地区农村体育组织管理现状及对策

对安徽省欠发达地区乡镇、行政村全民健身领导机构的设置,组织开展农民体育竞赛与体育健身活动,提供农民体育技术指导、咨询及体质测试,提供农民体育文化信息和宣传普及体育科普知识,开展送体育下乡活动等组织管理状况进行调查研究,并提出相应的对策。     

Two faces to the greenery on housing estates–mitigating climate but aggravating allergy. A Warsaw case study

Interest in the climate and an awareness of the beneficial cooling influence exerted on it by biologically-vital areas is growing, as climate change progresses, hot weather is more frequent as well as the urban heat island more intense. It is necessary to protect existing greenery in the cities and to introduce new planting. However plants in a warmer climate can produce larger amounts of pollen and are more readily able to initiate an allergic reaction among those prone to them. That means—not every greenery is advantageous for humans in the cities. In the research two housing estates built at different times and differ in type, density and age of buildings, as well as in the composition and the percentage of biologically vital area and the species planted were examined. Detailed inventory of tall greenery entailed the trees and shrubs and next their assumed allergenic potential was made. Cooling effect likely is derived from the difference in greenery, but the other factors such as differences in the density of buildings and spatial organization of the estate could also influence it. The older estate with the ratio of biologically vital areas of 54.3% is characterised by more favourable local climate than the newer estate, with the ratio of biologically vital areas equals 40.7% and young vegetation. On the newer one the perceptible thermal conditions did not differ significantly compared with the city centre. Unfortunately, on Koło Estate trees creating mild thermal conditions are also the trees promoting allergies most severely: birches, poplars and limes. And they are planted usually around playgrounds and kindergarten. The trees of high allergenicity should be partially removed, even risking small worsening thermal conditions.     

加快信息化建设 服务怀来农业

从搭建服务平台、延伸服务通道、服务怀来农业三个方面,阐述了怀来县＂8＋1＂农业农村信息化服务模式,为解决农业农村信息传递＂最初一公里＂和＂最后一公里＂问题进行探索,促进了全县农业增产和农民增收。     

内蒙古大兴安岭林区森林旅游业现状与发展对策

旅游业是前景广阔的"朝阳产业",森林旅游业是其中的重要组成部分。同时,森林旅游业也是未来林业发展的支柱产业之一。内蒙古大兴安岭林区风光秀丽,山峦逶迤,河流密布,林海茫茫,是不可多得的森林旅游胜地。因此,加强内蒙古大兴安岭林区森林旅游业的开发势在必行。     

小陇山林区高寒地沙棘的栽培技术

近年来,随着沙棘在绿化荒山、保持水土、改善生态环境等方面的营养价值和药用价值的不断开发与综合利用,沙棘已成为北方主要的栽培树种之一。为给沙棘在高寒地的栽培与推广提供技术指导,自2001年以来,在小陇山林业局滩歌林场秦岭高寒山区进行了大面积的人工栽培试验,并总结出了一整套沙棘栽培技术。     

两不同地域中华鳖的核型

本文研究了江苏南京和浙江绿兴中华鳖的染色体组型。结果表明，两者核型完全一致，均为２ｎ＝６６（４Ｍ＋８ＳＭ＋１６５＋３８ｍ），ＮＦ＝７８，核型模式为６＋８＋１９，通过对两者比较发现，两者绝对长度与相对长度均有差异，南京中华鳖第５对ＳＭ染色体为大型染色体中最小的，而绍尖中华鳖第５对ＳＭ染色体第１对Ｔ染色体等大；另外，两者臂比指数也有差异，但差异不显著。     

县域经济视角下南方民族地区农村青年就业模式研究——以广西恭城瑶族自治县为例

通过问卷调查,对生态农业县和非生态农业县农村青年的就业心理进行了比较分析,指出县域经济发展是影响农村青年就业模式的主要因素。并以广西恭城瑶族自治县为例,阐述了南方民族地区生态农业县农村青年多元一体化就业的成功模式及县域经济发展与农村青年就业的互动机制。进而提出了依托地方资源,推动县域经济健康发展,促进农村青年就业与城乡经济互动发展的思路。     

西部农村发展奶牛小区的优势及注意问题

西部农村饲草资源充裕,发展奶牛养殖小区有利于减少草料运输费用,有利于减轻城郊养牛环境污染,有利于改善牛奶质量。本文提出小区建设应注意的五个问题:注重奶牛质量;采用胚胎移植技术,提高小区牛群的个体产奶量:种养结合,建立与奶牛养殖业配套的饲草生产基地;改进饲养管理,推行混合日粮饲养技术;实行行业准入制度,控制小区环境污染,提高牛奶质量,生产绿色奶品。