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森林草原过渡区森林凋落物分解初期规律研究 被引量:1
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作者 赵鹏武 张素华 +2 位作者 张波 葛鹏 周梅 《内蒙古林业科技》 2016年第3期16-19,23,共5页
为了探索内蒙古大兴安岭南段森林草原过渡区凋落物分解规律和调节生态系统物质循环和能量流动的载体作用,本文采用网袋法对杨桦次生林凋落物分解状况进行了研究,结果表明:经过非生长季的冻融破碎过程白桦和山杨林的凋落物失重率分别变... 为了探索内蒙古大兴安岭南段森林草原过渡区凋落物分解规律和调节生态系统物质循环和能量流动的载体作用,本文采用网袋法对杨桦次生林凋落物分解状况进行了研究,结果表明:经过非生长季的冻融破碎过程白桦和山杨林的凋落物失重率分别变为51.34%和38.71%,生长季的分解变化不大,总体与土壤温度和含水量显著相关;凋落物失重模式分别为:y白=0.312e-0.4721t(R2=0.9347);y山=0.035e-0.3502t(R2=0.9601)。凋落物N、P、K 3种养分元素及有机碳含量的迁移规律从前1年的秋季到第2年的秋季基本呈"释放—富集"模式,生长季刚开始时养分动态均呈下降趋势,开始富集的转折点基本在分解210~240 d左右,到分解360 d时富集最大。由此可知:凋落物分解、养分元素迁移过程可能不以微生物分解为主导,降雨淋溶、物理破碎等非生物因素可能作用显著。 展开更多
关键词 森林草原过渡区 凋落物分解 规律
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Vegetation landscape structure and dynamics in sandy forest-steppe ecotone
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作者 邹春静 韩士杰 +1 位作者 徐文铎 李道棠 《Journal of Forestry Research》 SCIE CAS CSCD 2003年第4期303-306,共4页
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, land... 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. 展开更多
关键词 Vegetation landscape STRUCTURE DYNAMICS Sandy forest STEPPE ECOTONE
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