关键词: 长山药, 块茎, 膨大进程

Abstract: For three-year continuous research on long Chinese yam stem tuber, we have drawn a conclusion: the process in the expansion of the stem tuber can be divided into four periods; the beginning period is from the second decade of May to the first decade of June, the prelimiary period is from the second decade of June to the second decade of July, the flourishing period is from the last decade of July to the first decade of September, the last period is from the second decade of September to the first decade of ...