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南方红豆杉生长发育及其紫杉醇含量与环境因子的关系

花匠小妙招
2024-12-05 18:09

摘要： 研究了人工种植的3年生南方红豆杉的生长发育特征及其枝叶中紫杉醇的含量，并观测了其生长环境因子的动态特征。通过对南方红豆杉的生长发育特征以及其枝叶中紫杉醇含量与生长环境因子进行相关分析发现，南方红豆杉生长发育与空气和土壤湿度呈极显著的正相关，与空气和土壤温度、土壤N和K含量、土壤有机质和土壤紧实度呈正相关，与净辐射和土壤P含量呈负相关，但相关关系不显著，说明高温、高湿以及遮荫有利于南方红豆杉的生长，且对土壤P含量有较高需求；南方红豆杉枝叶中紫杉醇含量与空气和土壤湿度、土壤N、P和K含量呈负相关，与净辐射、空气和土壤温度、土壤有机质和土壤紧实度呈正相关，但相关关系均不显著，说明高温、高光强和干旱促进南方红豆杉枝叶中紫杉醇含量的增加，且紫杉醇含量的增加对土壤中N、P和K含量有一定的需求，尤其是N和K，对P需求不大；南方红豆杉生长发育与其枝叶中紫杉醇含量呈负相关，相关关系也不显著，推测紫杉醇可能是南方红豆杉的防御物质，以促使南方红豆杉抵御高温、干旱和高光强等不良环境。

关键词: 南方红豆杉, 紫杉醇, 环境因子

Abstract: The growth characteristics and the taxol content in the leaves and branches of Taxus chinensis var. mairei and the environment factors were studied. The correlativity between the growth characteristics and the taxol content in the leaves and branches of T.chinensis var. mairei and the environment factors showed that there was a extremely significant positive correlation between the growth and the air and soil humidity, and there was a significant positive correlation with the air and soil temperature, soil N content, soil K content, soil organic matter and soil tensity and a negative correlation with the net radiation and soil P content, but the correlation was not significant, which indicated that the high temperature and humidity and shade was favored to the growth of T.chinensis var.mairei, which needed more soil P content; There was a negative correlation between the taxol content and the air and soil humidity, the soil N, P, K content and a positive correlation with air and soil temperature, net radiation soil organic matter and soil tensity, which indicated that high temperature, high light tensity and drought were favored to the increase of taxol content, which needed more soil N, P, K content, especially the soil N and K content. There was a negative correlation between the growth and the taxol content, but the correlation was not significant, which indicated that taxol may be defense substance, which made the T.chinensis var. mairei adapt to the adversity, such as high temperature, drought, high light tensity and so on.

Key words: Taxus chinensis var.mairei, taxol, environment factors

中图分类号:

S567.1+9