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首页> 外文期刊>Scandinavian Journal of Forest Research >Variations in carbon and nitrogen ratios and their effects on seed germination in Cupressus sempervirens populations.
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Variations in carbon and nitrogen ratios and their effects on seed germination in Cupressus sempervirens populations.

机译：柏中种群碳氮比的变化及其对种子萌发的影响。

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摘要

This study investigated the variations in the carbon (C), nitrogen (N), and C/N ratios in the seeds of the Mediterranean Cypress (Cupressus sempervirens L.), a typical forest tree of the Mediterranean Region. The data were gathered from populations distributed across Turkey. We also evaluated the relationship between these variations and germination parameters such as the germination percentage (GP) and mean germination time (MGT). All of the evaluated characteristics demonstrated statistically significant variations among the populations. The GPs were generally low and varied between 14% in Datca and 51% in the Koprulu Kanyon. The MGTs ranged from 14.9 in the Koprulu Kanyon to 18.9 in Marmaris. In addition, the C ratios varied between 46% in Marmaris and 52% in the Koprulu Kanyon, while the N ratios ranged from 1.1% in Beycik and Goksu to 1.8% in the Koprulu Kanyon. Furthermore, we observed a positive correlation between the GP and the C and N contents (R2=0.51 and R2=0.49, respectively) but found a negative correlation between the MGT and the C and N contents (R2=0.56 and R2=0.32, respectively). Moreover, with regard to the combined C and N seed ratios of the regression models, R2=0.95 for the GP and R2=0.87 for the MGT, and the populations with higher quantities of C and N in their seeds had shorter MGTs and higher GPs.
机译：这项研究调查了地中海地区典型的林木地中海柏（Cupressus sempervirens L.）种子中碳（C），氮（N）和C / N比的变化。数据是从土耳其各地分布的人口中收集的。我们还评估了这些变异与发芽参数（如发芽率（GP）和平均发芽时间（MGT））之间的关系。所有评估的特征均显示出种群之间的统计学差异。 GP普遍较低，在Datca中为14％，在Koprulu Kanyon中为51％。 MGT的范围从Koprulu Kanyon的14.9到Marmaris的18.9。此外，马尔马里斯群岛的碳比率介于46％，而Koprulu Kanyon介于52％，而N比率则介于Beycik和Goksu的1.1％至Koprulu Kanyon的1.8％。此外，我们观察到GP与C和N含量之间呈正相关（分别为R 2 = 0.51和R 2 = 0.49），但发现GP与C和N含量之间呈负相关。 MGT和C和N含量（分别为R 2 = 0.56和R 2 = 0.32）。此外，关于回归模型的组合C和N种子比率，GP的R 2 = 0.95，MGT的R 2 = 0.87，以及种群种子中碳和氮含量较高的种子，其MGT较短，GP较高。

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