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在自然界,随着环境条件的季节性变化,植物的形态和内部生理机能也相应地产生一定的变化,这就是植物的物候周期变化。其中,外界环境条件是引起植物生理变化的原因,而植物的物候变化(形态变化)又是内部生理变化的结果。如果三者能同步协调地进行,植物就能在这种环境条件里生长发育;反之,植物就因不适应这种环境条件而不能很好地存活。因此,研究各树种的物侯变化规律,不仅有助于合理地制定其林业管理措施和适地适树地选择树种,而且可以早期预报引种的成功或失败。湿地松原产美国东南部,引入我国已有五十多年。近年来,因其优质丰产而被列为
In nature, with the seasonal changes in environmental conditions, plant morphology and internal physiological functions also have some changes accordingly, which is the plant phenology cycle changes. Among them, the external environmental conditions is the cause of plant physiological changes, and plant phenological changes (morphological changes) is the result of internal physiological changes. If the three can be coordinated with each other, plants can grow and develop in such environmental conditions; on the contrary, plants can not survive well because they do not adapt to such environmental conditions. Therefore, studying the changes of Houhou species of various species not only helps to rationally develop their forestry management measures and tree species suitable for tree selection, but also can predict the success or failure of introduction early. Slash pine native to the southeastern United States, the introduction of our country more than 50 years. In recent years, it has been listed for its high yield