%0 Journal Article
%A Peng ZHANG
%A Zheng ZHANG
%T Comparative Research on Growth and Physiological Characteristics of Three Poplar Varieties Grown in Western Heilongjiang
%D 2025
%R 10.7525/j.issn.1673-5102.2025.05.014
%J Bulletin of Botanical Research
%P 807-815
%V 45
%N 5
%X <p>In order to solve the problem of unmached species to site for poplar plantations in western Songnen Plain， three poplar varieties， namely HQ（<i>P. euramericana</i> ‘N3016’×<i>P. ussuriensis</i>）， LF（<i>P. deltoides</i>×<i>P. simonii</i> ‘LongFeng-1’） and 2111Y（<i>Populus euramericana</i>（Dode） cv. ‘DN113’） grown in western Heilongjiang as materials， the growth parameters， stoichiometric relationship of branches and leaves， and physiological characteristics of leaves were compared and analyzed. The results showed that the averaged annual radial growth rate was in a range of 2.32-2.84 cm?a<sup>-1</sup>， of which LF had the highest radial growth rate， followed by 2111Y， significantly higher than that of HQ. A binomial function relationship between stem diameter and stem height existed in the poplar varieties. Branch water contents of LF and 2111Y were significantly higher than that of HQ（<i>P</i>&lt;0.05）. Specific leaf area of LF was higher than that of the other poplar varieties. There were significant differences in elements content and their stoichiometric ratio in the twigs and leaves of high-class twigs. Among them， the N and K contents in leaves and twigs of LF were the highest， followed by 2111Y， and HQ； P content in leaves of 2111Y was higher than that of the other poplars. Leaf C-to-N ratios of the three poplar varieties were in the range of 19.41-21.65； C-to-P ratios in the range of 6.01-9.40. There were significant differences in leaf C and N metabolism levels of the three poplar varieties. Among them， leaf content of soluble sugar， starch， and non-structure carbohydrates of HQ were higher than those of LF and 2111Y， and the contents of <inline-formula><math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi mathvariant="normal">N</mml:mi><mml:msubsup><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn mathvariant="normal">3</mml:mn></mml:mrow><mml:mrow><mml:mo>-</mml:mo></mml:mrow></mml:msubsup></math></inline-formula> and <inline-formula><math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mi mathvariant="normal">N</mml:mi><mml:msubsup><mml:mrow><mml:mi mathvariant="normal">H</mml:mi></mml:mrow><mml:mrow><mml:mn mathvariant="normal">4</mml:mn></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msubsup></math></inline-formula> were higher than those of 2111Y， whereas leaf free amino acid content of HQ was lower than that of the other poplars. There was significant difference in plant hormone levels among the three poplar varieties， with salicylic acid contents in leaves of HQ and abscisic acid content in leaves of 2111Y significantly lower than the other poplars. The auxin content of LF leaves was lower than that of 2111Y leaves. There was no difference in leaf gibberellin content among the poplar varieties.</p>
%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2025.05.014