黄河冲积平原杨树人工林细根空间分布特征  

FINE ROOTS DISTRIBUTION PATTER OF POPULUS DELTOITES PLANTATIONS IN YELLOW RIVER FLUVIAL PLAIN

作　　者：李盼盼[1] 王延平[1] 王华田[1] 耿兵[1] 倪桂萍[1] 陈鸿鹰[1] 

机构地区：[1]山东农业大学林学院,山东省森林培育重点实验室,山东农业大学农业生态与环境重点实验室,山东泰安271018

出　　处：《山东农业大学学报（自然科学版）》2013年第1期61-65,共5页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：国家自然科学基金(31070550);山东省自然科学基金(ZR2012CM033)资助

摘　　要：采用改良全根调查方法,于生长季节末期对黄河冲积平原3a、6a、9a三个林龄的中菏1号杨树(Populusdeltoites cv.‘Zhonghe-1’)人工林根系空间分布特征进行了调查,并对直径小于2 mm的细根生物量、比根长、根长密度、表面积、体积进行测定分析。结果表明:在垂直方向上,各林龄杨树人工林细根生物量、根长密度、根尖数、细根表面积、细根体积总体上随土壤深度增加而逐渐减小,林龄之间、土层之间差异明显。细根在水平方向上的分布较为均匀,但林龄之间、以及距树干不同距离仍表现出明显差异。杨树人工林细根空间分布规律为林地土壤改良和培肥提供了依据。By using method method of modified whole root research, the study was conducted to discuss the spa- tial distribution of root system of 3a,6a,9a the three stand age of P. deltoites ev. Zhonghe -1 in the Yellow River alluvial plain, and analyze root biomass, root length, length density, surface area and volume of fine root ≤2 mm in diameter. Results showed that, in vertical direction, the root biomass, root length, length density, surface ar- ea and volume of roots ≤2 mm in diameter in every stand age of poplar plantation in general is gradually in- creased with soil depth decreases, and there are a significant differences between different stand age and differ- ent soil layer. Fine roots are distributed evenly in the horizontal, but between stand age and between different distances from the trunk still showed obvious difference. The space distribution of fine roots in Poplar plantation provides the basis for woodland soil improvement and fertilizer.

关 键 词：杨树人工林 细根生物量 比根长 根长密度 根尖数 细根表面积 细根体积 

分 类 号：S772[农业科学—森林工程]