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在南京林业大学下蜀实验林场,按杉木伐桩的全光、半荫、全荫处理,以及林木的环割、不割处理,春季分别取休眠芽(前三者)或侧枝顶芽(后二者)样品,进行有机物含量分析。结果表明,各处理样品中水溶性蛋白质含量差别不大,叶绿素含量亦都很低,但休眠芽中的水溶性糖含量比顶芽中要低得多。伐桩萌芽的含糖量并不与各处理条件下的光照和温度呈正相关关系;但伐桩上萌芽数目增多,则含糖量相应下降,表现为幂函数曲线关系。考虑到这种情况,以及幼芽内叶绿素含量水平很低,因此,可以认为萌芽的糖分主要来自根桩本身的碳水化合物贮藏物,而并非来自光合作用。因此,控制一个代桩上的萌芽数目,是获得健壮萌条的关键措施之一。
In the Xushu Experimental Forest Farm of Nanjing Forestry University, all the light, semi-shade and all-shade treatments, as well as ring cutting and cutting of the trees were carried out according to the experimental results. In the spring, the dormant buds Both) samples for organic content analysis. The results showed that there was no significant difference in water-soluble protein content and chlorophyll content in all treatments, but the content of water-soluble sugar in dormant buds was much lower than that in the terminal buds. The sugarcane content of barred stumps did not show a positive correlation with the light and temperature under various treatment conditions. However, when the number of sprout stumps increased, the sugar content decreased correspondingly, showing a power function curve. Given this situation, as well as the very low level of chlorophyll in young shoots, it is believed that the sprouted sugars mainly come from the carbohydrate storage of the root pile itself and not from photosynthesis. Therefore, controlling the number of buds on a pile is one of the key measures to get a healthy sprout.