红松一年生苗木根系生长发育动态的研究  

STUDY ON THE GROWING TRENDS OF ANNUAL SEEDLING ROOT SYSTEMS OF KOREAN PINE

作　　者：赵垦田[1] 王录[1] 尚杰[1] 武士龙[1] 王田和 单玉祥 

机构地区：[1]东北林业大学,东北农业大学,黑龙江省双鸭山林业局,黑龙江省松花江林业管理局

出　　处：《东北林业大学学报》1994年第3期49-54,共6页Journal of Northeast Forestry University

摘　　要：１９９２年在东北林业大学帽儿山实验林场苗圃，采用定位挖掘法研究了红松（Ｐｉｎｕｓｋｏｒａｉｅｎｓｉｓ）一年生苗木根系的季节生长发育动态。结果表明：（１）主根生长呈“Ｓ”型曲线，在种壳即将脱去时生长速度最大；（２）在脱壳期，当子叶暴露部分超过其自身长度一半时，在主根木栓化区域产生一级侧根根原基突起；一级侧根总长度生长呈。“Ｓ”型曲线，其峰值在真叶基本结束生长的８月下旬；（３）在幼苗高生长基本结束并形成顶芽时，在一级侧根上产生二级侧根根原基的突起；二级侧根总长度季节生长呈双。“Ｓ”型曲线；（４）根系中菌根几乎都是二级侧根和三级侧根，它们在真叶基本停止伸长后大量产生；（５）根的生长与根产生分枝、不同级别侧根的生长、苗木地上与地下器官的生长表现出高度的对立统一关系。The seasonal growing trends of annual seedling root systems of korean pine were studied with the method of orientation excavation at the nursery of Maoershan Experimental station in 1992.The main conclusions have been obtained as follows:(1)The growing trend of taproots was'S'curve and the greatest growing speed of taproots appeared when seed crusts almost dropped.(2) The taproots near surface phellem areas produced root primordium pustutes of first-order lateral roots when the length of bare cotyledons was more than 50 percent of total length theirselves.The growing trend of total length of the first -order lateral roots presented as'S' curve and the growing peak appeared at the last ten-day period of August when the long growth of leaves almost ceased.(3)when seedling tall growth ceased and formed terminal bud, boot primordium pustutes of second-order lateral roots formed on the first-order lateral roots.The total long growing trend of the second-order lateral roots was bi-'S'curve. (4)Bacteriorhizaes in root systems were almost the second-order and the third-order lateral roots. The most amount of bacteriorhizaes emerged after leavec ceased stretch. (5)The relations between differentation and root growth,among the growth of different order lateral roots and between the growth of shoot-leaf and root were high unity of opposite.

关 键 词：红松 一年生苗木 根系 生长发育 

分 类 号：S791.247[农业科学—林木遗传育种]