刘长发,苑静涵, 刘 远, 方 蕾, 王艺婷,陶 韦, 李 晋

1 大连海洋大学近岸海洋环境科学与技术辽宁省高校重点实验室, 大连 116023 2 盘锦市海洋与渔业科学研究所, 盘锦 124010

双台河口翅碱蓬生长与根、茎、叶碳、氮的分配

刘长发1,*,苑静涵1, 刘 远1, 方 蕾1, 王艺婷1,陶 韦1, 李 晋2

1 大连海洋大学近岸海洋环境科学与技术辽宁省高校重点实验室, 大连 116023 2 盘锦市海洋与渔业科学研究所, 盘锦 124010

生物个体生长过程是其同化作用和异化作用过程中物质和能量吸收、转运、储存、排出平衡的综合结果,体现了生物对其生存环境的适应。对采集于双台河口潮滩湿地的翅碱蓬(Suaedaheteroptera)进行株高和根、茎、叶碳、氮含量测定的结果显示,以AICC和adj-R2为准则选择的翅碱蓬株高生长模拟方程为Logistic方程。采用多模型推断确定的双台河口翅碱蓬平均理论渐近株高H∞为(38.11±2.59) cm。翅碱蓬根、茎、叶碳含量分别为(37.92±4.40)%、(39.98±3.12)%、(28.27±3.41)%；氮含量分别为(0.68±0.35)%、(0.94±0.31)%、(1.26±0.19)%。仅根碳、氮含量与株高间呈显著负相关生长关系。翅碱蓬根碳、氮相对含量分别为97.8±2.1、90.2±9.2,与株高(8.1—36.6 cm)相比,翅碱蓬根碳、氮积累可能受到了环境条件限制。

翅碱蓬; 生长; 碳; 氮; 分配

Abstract： Plant growth is the result of material metabolism and energy transformation under two opposing processes: catabolism and anabolism. The metabolic balance of plants should be maintained for better acclimation to the surrounding environment. In the present study, growth parameters of the halophyteSuaedaheteroptera, which thrives in Shuangtai Estuary, were examined, including the height of plants and the amounts of carbon (C) and nitrogen (N) in the roots, stems, and leaves. The data collected were analyzed using three different models: the von Bertalanffy growth model, the logistic growth model, and the Gompertz growth model. The logistic growth model proved optimal because it minimized the effects of small sample size, is a bias-corrected form of Akaike′s information criterion, and maximized the adjusted R square. The mean asymptotic height was estimated to be (38.11±2.59) cm when utilizing the multi-model inference approach. The absolute values of C in the root, stem, and leaf ofS.heteropterawere (37.92±4.40)%, (39.98±3.12)%, and (28.27±3.41)%, respectively. The absolute values of N in the root, stem, and leaf ofS.heteropterawere (0.68±0.35)%, (0.94±0.31)%, and (1.26±0.19)%, respectively. The allocation of C and N in the root was negatively correlated with the height of the plant. In comparison to the height (8.1—36.6 cm), the relative values of C and N in the root ofS.heteropterawere (97.8±2.1) and (90.2±9.2), respectively, which implies that the accumulation of C and N in the root might be restricted by environmental conditions.

KeyWords:Suaedaheteroptera; growth; carbon; nitrogen; allocation

生物个体生长过程是其同化作用和异化作用过程中物质和能量吸收、转运、储存、排出平衡的综合结果。因此,供生物生长的物质和能量在其被生物吸收、转运、储存、排出的生态生理学过程中,各种物质和能量的供给可能成为生物生长的限制要素。植物生长限制要素可能是空间、光照、水、养分以及可能的环境要素胁迫等。在长期的适应生存和自然选择下,植物在生态与进化环境中形成了不同的表现,即生存对策——C-S-R对策(竞争型C；……