Abstract

In this study, leaf nutrient contents, resorption efficiency (RE) and resorption proficiency (RP) values were examined in three sympatric woody species—P. tremula, Q. maranthera subsp. syspirensis and L. caucasica subsp. orientalis during two years in Northern Black Sea Region (Turkiye). According to the data obtained the highest N, P, K, Mg, Ca, Fe and Cu concentrations in green leaves were found in L. caucasica in both two years. However, the highest Zn concentrations in green leaves were found in P. tremula whereas the highest Mn concentrations were found in Q. macranthera. PRE was found to be higher than NRE and for all other elements in the study area. On the other hand, all studied species demonstrated similar RE values for macronutrients in general. Negative RE values were found with respect to Cu, Fe, Ca and MnRE in P. tremula, and with respect to CaRE in L. caucasica. However, all elements were resorbed in Q. macranthera. Our data indicate that species specificity plays an important role in resorption of microelements in the studied species. P. tremula and Q. macranthera were N and P-proficient only in first year whereas L. caucasica was not N and P-proficient in the present study. Nitrogen and phosphorus limitations varied due to plant species and leaf growth stages with respect to N/P ratios in the study area.

中文翻译：

---

土耳其黑海东北部地区欧洲山杨林三种同域落叶树种的叶吸收

摘要

在本研究中，研究了三种同域木本植物——欧洲银杉（ P. tremula）、栎树亚种（ Q. maranthera subsp.）的叶片养分含量、吸收效率（RE）和吸收能力（RP）值。syspirensis和L. caucasica subsp. 在北黑海地区（土耳其）的两年中发现了侧柏。根据获得的数据，两年来高加索绿叶中 N、P、K、Mg、Ca、Fe 和 Cu 浓度最高。然而，绿叶中锌浓度最高的是欧洲银杉，而锰浓度最高的是Q.macranthera。研究发现，PRE 高于 NRE 以及研究区域的所有其他元素。另一方面，所有研究的物种总体上都表现出相似的大量营养素的 RE 值。欧洲松中的 Cu、Fe、Ca 和 MnRE 以及高加索中的 CaRE均呈负 RE 值。然而，所有元素都在Q. maranthera中被吸收。我们的数据表明，物种特异性在所研究物种的微量元素吸收中起着重要作用。P. tremula和Q. macranthera仅在第一年精通 N 和 P，而L. caucasica在本研究中并不精通 N 和 P。氮和磷的限制因研究区域的植物种类和叶片生长阶段的氮磷比而异。