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2011年8月,在红松阔叶混交林2.55hm2的样地内,调查了42株倒木及其形成的坑和丘复合体的微立地特征及其植被更新状况,测定了丘顶、丘面、坑壁、坑底、完整立地5个微立地的土壤含水量、土壤温度、空气相对湿度和光合有效辐射.结果表明:在5个微立地中,丘顶的光合有效辐射最高(527.9μmol·m-2·s-1),完整立地最低(58.7μmol·m-2·s-1);丘顶的土壤温度最高(16.0℃),坑底最低(13.3℃);坑底的土壤含水量最高(34.6%),丘面最低(0.5%);完整立地的空气相对湿度最高(75.9%),丘顶最低(68.0%).形成坑和丘复合体的5个树种的频率大小依次是红松(42.9%)>云杉(31.0%)>白桦(16.7%)>冷杉(7.1%)>稠李(2.4%).42株掘根倒木中,有2/3偏向西北方向.倒木体积与坑深度、坑长度、丘高度、丘宽度均呈极显著正相关,与丘厚度呈负相关.坑的宽度和长度分别与倒木的胸径呈显著和极显著正相关.不同微立地之间物种丰富度的大小顺序为完整立地>坑>丘;所有树种盖度的大小顺序依次为完整立地>坑>丘.
In August 2011, the microlographic features and vegetation regeneration of 42 down-pits and their pits and mounds were investigated in a 2.55 hm 2 plantation of Korean pine broad-leaved mixed forest. The effects of mound tops, The soil moisture, soil temperature, air relative humidity and photosynthetically active radiation of five micro-plots at the pit wall, pit bottom and intact site were studied.The results showed that the photosynthetically active radiation at the top of the hilltops was the highest (527.9μmol · m -2 · s-1), and the lowest on the complete site (58.7μmol · m-2 · s-1). The highest soil temperature was at the top of the hilltop (16.0 ℃) and the bottom of the pit was the lowest (13.3 ℃) (34.6%) and the lowest mound (0.5%). The highest relative humidity (75.9%) and the lowest (68.0%) of the hilltops on intact stand were observed.The frequencies of the five tree species that formed pits and mounds were in the order of Korean pine (42.9%)> spruce (31.0%)> birch (16.7%)> fir (7.1%)> plum (2.4%). Depth, pit length, mound height and mound width were negatively correlated with mound thickness.The pit width and length of mound pit were significantly and positively correlated with DBH of inverted wood respectively.Furthermore, The richness of the order of a full site> pit> mound; coverage of all species the size of the order for the complete site> pit> mound.