黑龙江省的西部松嫩平原6个杨树品种光合特征  

Photosynthetic Characteristics of Six Poplar Varieties in the Songnen Plain of Western Heilongjiang Province

作　　者：王力刚 张玉柱 崔琳 Wang Ligang;Zhang Yuzhu;Cui Lin(Qiqihar Branch of Heilongjiang Academy of Forestry,Qiqihar 161005,P.R.China)

机构地区：[1]黑龙江省林业科学院齐齐哈尔分院,齐齐哈尔161005

出　　处：《东北林业大学学报》2021年第8期40-44,63,共6页Journal of Northeast Forestry University

基　　金：林业科技创新平台运行补助项目(2020132521);中央财政林业科技推广项目([2018]HZT12号)。

摘　　要：通过盆栽试验,测定分析了6个杨树品种净光合速率(P_(n))、蒸腾速率(T_(r))及叶片水分利用效率(W_(U,E))随光照强度从低到高梯度变化后的表现特征及差异,探讨分析了不同杨树品种光补偿点、光饱和点及光适应幅度。结果表明:随着光照强度由0~1800μmol·m^(-2)·s^(-1)的梯度变化,6个杨树品种叶片净光合速率、蒸腾速率及叶片水分利用效率均随着光照强度递增而增大,各品种间呈现不同程度差异。其中,净光合速率均值由大到小依次为DN113杨(11.35μmol·m^(-2)·s^(-1))、青山杨(10.93μmol·m^(-2)·s^(-1))、银中杨(10.52μmol·m^(-2)·s^(-1))、山新杨(8.71μmol·m^(-2)·s^(-1))、中黑防杨(8.42μmol·m^(-2)·s^(-1))、小黑杨(1.67μmol·m^(-2)·s^(-1));蒸腾速率均值由大到小依次为青山杨(4.87 mmol·m^(-2)·s^(-1))、中黑防杨(4.47 mmol·m^(-2)·s^(-1))、DN113杨(4.22 mmol·m^(-2)·s^(-1))、山新杨(4.10 mmol·m^(-2)·s^(-1))、银中杨(4.01 mmol·m^(-2)·s^(-1))、小黑杨(2.87 mmol·m^(-2)·s^(-1));水分利用效率均值由大到小依次为DN113杨(2.46μmol·mmol^(-1))、银中杨(2.37μmol·mmol^(-1))、青山杨(2.04μmol·mmol^(-1))、山新杨(1.94μmol·mmol^(-1))、中黑防杨(1.70μmol·mmol^(-1))、小黑杨(0.27μmol·mmol^(-1))。6个杨树品种中,DN113杨、青山杨、银中杨光补偿点较低、光饱和点较高,对光照适应幅度较宽;山新杨、中黑防杨次之;小黑杨光补偿点相对最高(210.8μmol·m^(-2)·s^(-1)),光饱和点(1516.7μmol·m^(-2)·s^(-1))相对最低,对光照的适应幅度相对最窄。The characteristics and differences of net photosynthetic rate(P_(n)),transpiration rate(T_(r))and leaf water use efficiency(W_(U,E))of six poplar varieties with different light intensity gradients from low to high were analyzed by pot experiment.The light compensation point,light saturation point and light adaptation amplitude of different poplar varieties were discussed and analyzed.The net photosynthetic rate,transpiration rate and water use efficiency of leaves of six poplar varieties raised with the increase of light intensity gradient from 0-1800μmol·m^(-2)·s^(-1),but the degree of each variety was different.Among them,the mean value of net photosynthetic rate from large to small was Populus×euramericana cv.‘DN113’(11.35μmol·m^(-2)·s^(-1)),Populus pseudo-cathavana×P.deltoides Bartr.cv.‘Shanhaiguran’(10.93μmol·m^(-2)·s^(-1)),Populus alba×P.berolinensis(10.52μmol·m^(-2)·s^(-1)),Populus davidiana×P.bolleana(8.71μmol·m^(-2)·s^(-1)),Populus deltoides×P.cathyana(8.42μmol·m^(-2)·s^(-1)),Populus simonii×P.nigra(1.67μmol·m^(-2)·s^(-1));the mean value of transpiration rate from large to small was Populus pseudo-cathavana×P.deltoides Bartr.cv.‘Shanhaiguran’(4.87 mmol·m^(-2)·s^(-1)),Populus deltoides×P.cathyana(4.47 mmol·m^(-2)·s^(-1)),Populus×euramericana cv.‘DN113’(4.22 mmol·m^(-2)·s^(-1)),Populus davidiana×P.bolleana(4.10 mmol·m^(-2)·s^(-1)),Populus alba×P.berolinensis(4.01 mmol·m^(-2)·s^(-1)),Populus simonii×P.nigra(2.87 mmol·m^(-2)·s^(-1)),and the mean value of water use efficiency from large to small was Populus×euramericana cv.‘DN113’(2.46μmol·mmol^(-1)),Populus alba×P.berolinensis(2.37μmol·mmol^(-1)),Populus pseudo-cathavana×P.deltoides Bartr.cv.‘Shanhaiguran’(2.04μmol·mmol^(-1)),Populus davidiana×P.bolleana(1.94μmol·mmol^(-1)),Populus deltoides×P.cathyana(1.70μmol·mmol^(-1)),Populus simonii×P.nigra(0.27μmol·mmol^(-1)).Among the six poplar varieties,the light compensation point of Populus×euramericana cv.‘DN113’,Populus

关 键 词：杨树 光合速率 蒸腾速率 水分利用效率 光适应幅度 

分 类 号：S792.11[农业科学—林木遗传育种]