影响林木根系垂直生长因素探讨  

A Study on Influencing Factors for Vertical Growth of Tree's Root

作　　者：刘春鹏[1] 李向军[1] 安萍[2] 杨丽娟 支恩波 王学勇[1] 刘泽勇[1] 李新利[1] 

机构地区：[1]河北省林业科学研究院河北省林木良种工程技术研究中心,河北石家庄050061 [2]日本鸟取大学干旱地研究中心 [3]文安县林业局,河北文安065800

出　　处：《福建林业科技》2014年第4期40-44,共5页Journal of Fujian Forestry Science and Technology

基　　金：国家948项目(沙地节水造林综合配套技术引进;2011-4-56)

摘　　要：为了探索林木深根苗快速培育方法,以樟子松、沙棘为研究对象,探讨土壤基质配比、土壤水分、灌水方式、植物生长调节剂(1-萘氨甲酰苯甲酸,简称NPA)对其根系垂直生长的影响。结果表明:土壤基质配比、土壤水分对樟子松、沙棘根系的垂直生长均具有显著影响,与对照(纯沙丘沙,土壤密度1.3 g·m-3)相比,沙丘沙∶泥炭土=1∶2(体积比,土壤密度0.7g·m-3)处理的樟子松、沙棘根系垂直长度分别提高36.6%、27.1%;与水分胁迫处理相比,充足的土壤水分使樟子松、沙棘根系垂直长度分别提高22.0%、20.8%;灌水方式对樟子松苗木根系垂直生长影响显著,下部吸水方式比上部灌水方式提高24.6%,而灌水方式对沙棘根系垂直生长影响不显著;NPA对沙棘根系的垂直生长影响显著,与不施用NPA相比提高30.6%,而NPA对樟子松苗木根系垂直生长影响不显著。To examine the methods of quick cultivation technique of tree long root -seedling, this study took Pinus sylvestnis var.mon-golica Litv.and Hippophae rhamnoides Linn.as the study object, and study the influence of soil substrate ratio , soil moisture, irri-gation method and plant growth regulator （ N-1-naphthylphthalamic acid ） on vertical growth of tree′s root, the result was that： soil substrate ratio had significant effect on vertical growth of Pinus sylvestnis var.mongolica Litv.and Hippophae rhamnoides Linn.′s root, compared with the control （pure-dune sand, the soil density was 1.3 g？ m-3）, under the treatment of dune sand∶peat soil （volume ratio ） =1∶2（the soil density was 0.7 g？ m-3）, the vertical length of Pinus sylvestnis var.mongolica Litv.and Hippophae rhamnoides Linn.′s root were respectively increased by 36.6% and 27.1%.Soil moisture also had significant effect on vertical growth of their root, compared with the treatment of water stress , enough water could improve the vertical growth of their root by 22. 0%and 20.8%.Irrigation method only had significant effect on vertical growth of Pinus sylvestnis var.mongolica Litv.′s root, com-pared with irrigation from upper part , water absorption from lower part could improve the vertical growth of Pinus sylvestnis var.mon-golica Litv.′s root by 24.6%.Plant growth regulator only had significant effect on vertical growth of Hippophae rhamnoides Linn.′s root, compared with no NPA application , NPA application could improve the vertical growth of Hippophae rhamnoides Linn.′s root by 30 .6%.

关 键 词：林木深根苗 根系垂直生长 影响因子 

分 类 号：S723.13[农业科学—林木遗传育种]