白术比叶重与地下根茎干重变化规律及相关性研究

The Change Rules and Correlation between Specific Leaf Weight and Dry Weight of Rhizoma of Atractylodes macrocephala

目的:以一年生和二年生白术为研究对象,研究其全生育期比叶重和地下根茎的变化规律,并对二者相关性进行分析,为白术快速测产提供实验依据。方法:采用定期挖掘法采挖一年生和二年生白术(根据地下根茎形态分为鸡腿型/蛙型、二叉型、武字型),测定比叶重和根茎干重,计算折干率和相关性。结果:一年生白术生育期比叶重呈N字型,二年生白术3种根茎类型的生育期比叶重呈直线增长,均在十月下旬达到最大值;所有根茎干重均呈现直线增长,并且根茎折干率随时间增加而增加。结论:一年生白术生育期比叶重根茎增重相关性较差,二年生各根茎类型白术呈现较强的正相关性。

Objective： To study the change rules of specific leaf weight, dry weight of rhizoma and the drying rate of annual and biennial Atractylodes macrocephala. Methods ： We measured the specific leaf weight and dry weight of rhizoma, and accounted the drying rate and correlation by dugging the annual and biennial plants each 15 days. There were 3 rhizoma types of biennial Atractylodes macro- cephala with Drumstick/Frog type, Er-eha type and Wu-zi type. Results ： It showed the curve of specific leaf weight of annual plant was ＂N＂ style, which of biennial plant was linear. The dry weight and the drying rate of all rhizoma types increased point-blank during the whole growth period. Conclusion ： The correlation between specific leaf weight and dry weight of rhizoma is obvious in biennial Atractylodes macrocephala but is contrary in annual Atractylodes macrocephala.