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本研究以广西全州县咸水林场杉木种子园中的衰退个体为对象进行截干试验,截干1年和4年后,采集当年抽梢的半木质化枝条进行叶片气孔特征观察,从不同无性系、不同截干时间和不同枝条方向等3个方面探讨其叶片气孔器特征的差异性。结果表明:杉木叶片的气孔,中等密度占多数,总体近乎正态分布;气孔器长度与宽度呈极显著正相关,与气孔密度则呈极显著负相关;对于气孔形态,不同无性系的影响最为显著,截干因素次之,枝条方向的影响最小。本试验揭示了截干措施对杉木叶片生理结构的影响,可为进一步探究杉木种子园衰退母树个体的复壮机制,提高经营水平、延长使用期限提供依据。
In this study, truncated stem cuttings were conducted in the deciduous individuals in the Chinese fir seedlings in the salt water forest farm of Quanzhou County, Guangxi. After 1 year and 4 years of truncation, semi-lignified shoots were collected for leaf stomatal observation. Clones, different cut-off time and different branches of the three aspects of the stomatal characteristics of the differences between the leaves. The results showed that stomatal and intermediate density accounted for most of the leaves, with an almost normal distribution in general. The stomatal length and width were significantly and positively correlated with stomatal density, while the stomatal density was significantly negatively correlated with stomatal shape and clonality Significantly, followed by the stems of the least, the direction of the smallest branches. This experiment revealed the effects of truncated stems on the physiological structure of Chinese fir leaves and may provide the basis for further exploration of the rejuvenation mechanism of the individuals of the deciduous tree in Chinese fir seed orchard and the improvement of the management level and the extension of the service life.