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当前位置: 首页 > 文章 > 施肥对日本落叶松人工林细根直径、根长和比根长的影响 应用生态学报 2007,18 (5) 959-964
Position: Home > Articles > Effects of fertilization on fine root diameter,root length and specific root length in Larix kaempferi plantation. Chinese Journal of Applied Ecology 2007,18 (5) 959-964

施肥对日本落叶松人工林细根直径、根长和比根长的影响

作  者：
于立忠;丁国泉;史建伟;于水强;朱教君;赵连富
单  位：
东北林业大学林学院;辽宁省森林经营研究所;中国科学院沈阳应用生态研究所;辽宁清源113300;中国科学院沈阳应用生态研究所 沈阳110016;辽宁省清源满族自治县林业局
关键词：
日本落叶松;细根根序;细根形态;施肥
摘  要：
以辽宁东部山区16年生日本落叶松人工林为研究对象,探讨施肥对日本落叶松1~5级根序中细根直径、根长和比根长的影响.结果表明:随着根序等级的增加,日本落叶松细根平均直径和根长显著增加(P<0.05,P<0.01)、比根长则显著下降(P<0.01).在日本落叶松的5级根序中,1级根的平均直径最细、根长最短、比根长最高,而5级根则相反;随着根序等级的增加,日本落叶松细根平均直径、根长和比根长的变异系数逐渐增大.除1级根外,土层对细根的平均直径、根长和比根长没有显著影响(P>0.05).与对照样地相比,施肥对各级细根平均直径、根长和比根长的影响主要表现在1~2级根上,对3级根序以上的细根影响不显著(P>0.05).其中,施氮肥显著降低了1~2级根的平均直径(P<0.05),施氮肥以及氮磷肥显著降低了表层土壤(0~10 cm)中1级根的平均根长(P<0.05),表层土壤中细根的比根长在施氮肥的条件下显著增加(P<0.05).
译  名：
Effects of fertilization on fine root diameter,root length and specific root length in Larix kaempferi plantation.
作  者：
YU Li-zhong1,2,DING Guo-quan1,3,SHI Jian-wei1,YU Shui-qiang1,ZHU Jiao-jun2,ZHAO Lian-fu4 (1School of Forestry,Northeast Forestry University,Harbin 150040,China;2Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China;3Liaoning Institute of Forest Management,Dandong 118002,Liaoning,China;4Forestory Bureau of Qinguan Manzhu Autonomous County,Qingyuan 113300,Liaoning,China).
关键词：
Larix kaempferi;fine root order;fine root morphology;fertilization.
摘  要：
With 16 years old Larix kaempferi plantation in the mountainous area of eastern Liaoning Province as test object,this paper studied the effects of fertilization on the fine root diameter,root length,and specific root length(SRL) of the first to fifth order roots.The results showed that with ascending root orders,the mean fine root diameter and root length increased,while the SRL decreased significantly.Among the five order roots,the first order roots were the thinnest in diameter,the shortest in length,and the highest in SRL,but the fifth order roots were in reverse.The variance coefficients for the fine root diameter,root length,and SRL increased from the first to the fifth order roots.Except for the first order roots,soil depth had no significant influence on the fine root diameter,root length and SRL.Fertilization affected the fine root diameter,root length,and SRL of the first and the second order roots significantly,but had little effects on other order roots.N fertilization decreased the mean diameter of the first and the second order roots significantly,and N or N+P fertilization decreased the mean length of the first order roots in surface soil(0-10 cm) significantly.The SRL of the first order roots in surface soil increased significantly under N fertilization.

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