红松、云杉和水曲柳细根比较

摘要

This paper studied the fine root biomass,the average root length,the length change of fine root and ratio root of Pinus koraienschangeis,Picea mongolica and Fraxinus mandshurica.The results showed that the total biomass of Pinus koraiensis and Fraxinus mandshurica decreased as the fine root level increased,and the spruce did not have the regularity of the above tree species.In the root system,the average length of individual roots increased significantly,but the root length was not significantly different in the same lower order.The total length of Pinus koraiensis,Picea fir and Fraxinus mandshurica was gradually increased from lower order to higher order.And the root length of the same tree species was lower than that of the root length from the low order to the higher order.The different tree species were significantly different from the root length construction,the ash was the highest and the spruce was the second the average growth rate of the Fraxinus mandshurica root was significantly higher than that of Pinus koraienschangeis and Picea mongolica.%对红松、云杉和水曲柳的细根生物量、不同根序细根平均根长和细根总长变化以及细根比根长变化进行比较研究.结果表明,红松、水曲柳生物量根序之间总体表现为随着细根级别增加而减少,云杉则没有上述树种所表现的规律性;根系统中由远端低级根序到近端的高级根序个体根的平均长度显著增加,但在同一个低级根序内根长差异不显著;红松、云杉和水曲柳由低级根序到高级根序细根的总长度逐渐下降;同一树种不同根序内,细根比根长由低级根序到高级根序逐渐降低;不同树种比根长构建方式明显不同,水曲柳比根长最高,云杉次之,红松比根长最低;水曲柳根生长的平均速率明显高于红松和云杉.