失水胁迫对长白落叶松播种苗移栽期活力的影响  

Effect of Air-Drying on Vigor of Larix olgensis Seedlings during Transplantation

作　　者：康瑶瑶[1] 刘勇[1] 李国雷[1] 马履一[1] 贾忠奎[1] 姜长吉 刘福森 李学莲 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083 [2]吉林市龙潭区江密峰苗圃,吉林132206

出　　处：《林业科学》2011年第6期188-193,共6页Scientia Silvae Sinicae

基　　金：国家"十一五"科技支撑计划(2006BAD24B01);中央高校基本科研业务费专项资金资助(BLJD200905);985子平台-优质高效森林培育;经营与利用研究方向

摘　　要：苗木形态、生理和活力状况是评价苗木质量的主要方面（刘勇,1999）,苗木活力与成活率直接相关（Krameretal.,1979;喻方圆等,2002）。苗木起苗后经过分级、包装、贮藏和长途运输,到最终被栽植,这期间可能会受到失水、高温和低温、光照不足等异常因素的影响,导致苗木活力下降,从而直接影响移栽成活率。一些研究表明。Larix olgensis seedlings were exposed to the air-drying treatments during the transplanting process. The relative moisture content, water potential, root vigor and seedling performance after transplantation were measured. The relationships among these indicators were discussed. The results showed that the seedling vigor of Larix olgensis seedling was related closely with its seedling moisture condition. The relative moisture content, water potential and root vigor were decreased gradually with the air-drying time lasting, and the transplanted seedling performance in current year was weaker too. The critical value of relative moisture content, water potential and TTC reduction intensity was 54.46%,-0.38 MPa and 39.88% respectively for the seedlings whose survival rate after transplanting ≥85%, while the value was 18.68%,-2.21 MPa and 0 respectively for the dying seedlings. The tolerable exposure time to the air-drying was within 30 min. It is suggested that the root of Larix olgensis seedling should not be exposed over 30 min during transplanting process.

关 键 词：长白落叶松 播种苗 苗木活力 

分 类 号：S723.3[农业科学—林木遗传育种]