Vegetation Community Convergence of Pastoralists’ Pasture at Different Economic Levels in Desert Ste

来源 :农业科学学报(英文版) | 被引量 : 0次 | 上传用户:fancysoul
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Vegetation characteristics of pastoralist households’ pastures at different economic levels were quantiifed to compare the grassland conditions in Sunite Right Banner, Inner Mongolia, China in 2011 and 2012. The results showed that the heights of Stipa klemenzis and Cleistogenes songorica were similar among economic treatments. And the height of Allium polyrhizm had no signiifcant differences between high-economic-level (HEL) and low-economic-level (LEL) treatments. There were no signiifcant difference among treatments in the canopy cover of C. songorica. The densities of dominant species (S. klemenzis, C. songorica and A. polyrhizm) were signiifcantly similar among treatments. Aboveground community biomass in reference area (CK) was higher than that in other three treatments in 2011, but their biomass showed no signiifcant difference among three economic treatments;for 2012, biomass in HEL was higher than low-economic-level treatment (LEL), while the biomass in middle-economic-level treatment (MEL) and CK was similar to that in HEL and LEL, respectively. Aboveground biomass of S. klemenzis and C. songorica was similar among treatments in both 2011 and 2012. Biomass of A. polyrhizum had no signiifcant difference between HEL and MEL. Households of LEL had rented out excess lands and those of HEL had leased their available lands thus resulting uniform utilization and convergence of pastoralist households’ pastures across all economic levels.
其他文献
近年来,在锦州北部火山岩区开展的矿产普查和1:5万区域地质矿产调查中,发现金(银)矿床、矿点和矿化点多处。通过本区区域地质矿产资料的分析,认为锦州北部火山岩地区金(银)矿
用经典湿化法处理样品,利用原子吸收分光光度法对八种禽蛋及功能性禽蛋的蛋黄和蛋清中Cu、Zn、Fe、Mn等元素进行了测定,同时也测定了Ca、Mg这样的常量元素。结果表明:禽蛋及功能
在统计过程控制中通过分析(-X)控制图,指出(-X)图虽然对监测过程大波动非常灵敏,但对过程均值小漂移却不敏感,若结合使用判异规则,将导致虚发警报概率的增加.通过仿真数据图
高填石路堤的沉降变形过程一般为从填石体施工期的瞬时变形到进一步的蠕变变形,利用沉降资料进行路堤沉降预测的常用模型可较好地反映其沉降变化规律及发展趋势,但尚存在一定
本文对溪流景观进行分析,并提出自己的见解。溪流是城市中最具环保特色的动态水景,也是最有亲和力和文化个性的载体,溪流景观的营造逐渐成为城市魅力展现的特色窗口。然而,仅仅以
提出了一种基于模糊逻辑的汽车侧偏角估计方法。它利用模糊逻辑和汽车运动学模型,将汽车转向盘转角、车轮转速、汽车加速度和横摆角速度信息相融合,进行车辆侧偏角估计。试验
基层党支部是战斗堡垒,是加强单位党的建设的核心与保障,本文结合工作实际介绍了在新的形势下地质勘查单位基层党支部工作存在的问题,并从实践出发提出了克服存在问题的有效
通过对半日潮及潜流层活动规律的掌握和规避,采用提高水头、改善泥浆质量、用麻筋提高护壁稳定性等措施,形成针对半日潮富潜流地段的钻孔灌注桩施工工艺,有效地控制了桩基施工质
Erhualian and Landrace breeds are typical genetically obese and lean pigs, respectively. To compare the fecal methanogenic Archaeal community between these two
本文主要是基于这样的观点来讨论我国的公共管理问题:树立公共管理的理念,培育健康、良性发展的公民社会,创建并运用适合于中国国情的治理理论,达到公共管理的新境界.