不同剂量137Cs-γ辐射对早竹生长性状及光合作用的影响  

The Effects of Different Doses of 137Cs-γ Radiation on Growth Traits and Photosynthesis of Phyllostachys Praecox

作　　者：沈鑫[1] 王波[1] 蒋冬月[1] Shen Xin;Wang Bo;Jiang Dongyue(Zhejiang Academy of Forestry,Hangzhou Zhejiang 310023,China)

机构地区：[1]浙江省林业科学研究院,浙江杭州310023

出　　处：《西南林业大学学报（自然科学）》2021年第2期23-29,共7页Journal of Southwest Forestry University：Natural Sciences

基　　金：浙江省十三五林木新品种选育项目(2016C02056-12)资助。

摘　　要：为探究物理辐射对早竹前期生长的影响,利用不同剂量的137Cs-γ辐射对早竹半年生竹鞭苗进行辐照处理后,对处理过的2年生早竹成竹进行株高、节数、秆粗等生长性状和光合特性相关指标的测定,研究辐射对早竹成竹生长发育的影响。结果表明:随着辐射剂量的增加,早竹的生长势和光合作用变弱,且大多辐射处理植株的生长性状和对照差异显著;但经10 Gy处理植株的株高和节数,以及经5 Gy处理的植株的鞭长、叶质量和整株质量与对照之间无显著差异,且30 Gy和40 Gy分别是早竹竹鞭苗的半致死剂量和致死剂量。早竹生长性状之间均为显著正相关,相关系数为0.65~0.99;生长性状与光合作用中的光饱和点及最大光合速率呈显著正相关,相关系数为0.59~0.97,与光补偿点及暗呼吸速率之间呈显著负相关,相关系数为0.05~0.97。For exploring the effects of radiation on pre-growth of Phyllostachys praecox,by using different radiation doses from 137Cs-γ radiation,the irradiation treatment was carried out on half a year old raw P.praecox shoots,and then estimated growth characters,such as height,internode number,and diameter,and related indicators of photosynthesis after 2 years growth.The results indicated that with the increasing of radiation dosage,the growth of P.praecox was repressed,and the variations of agronomic characters and photosynthesis were significant between treated bamboos and normal bamboos.However,the variations of the height and internode number with treatment of 10 Gy,and shoot length,leaves weight and whole plant weight with treatment of 5 Gy were nonsignificant.And 30 Gy and 40 Gy were half lethal dose and lethal dose respectively.The relations among the growth characters were positive with the range of correlation coefficient from 0.65 to 0.99.The relations between growth characters and light saturation point,and maximum photosynthetic rate were positive with the range of correlation coefficient from 0.59 to 0.97,while the relations between growth characters and light compensation point,and dark breathing rate were negative with the range of correlation coefficient from 0.05 to 0.97.

关 键 词：早竹 137Cs-γ辐射 生长性状 光合作用 

分 类 号：S795[农业科学—林木遗传育种]