土茯苓种苗质量分级标准研究

Study on Quality Grading Standard for Smilax glabra Seedlings

关键词:  土茯苓  种苗  分级标准  相关分析  聚类分析

Key words:  Smilax glabra  seedlings  grading standard  correlation analysis  clustering analysis

摘要:

探究土茯苓(Smilax glabra)种苗质量分级标准，为土茯苓人工种植规范化发展奠定基础。本研究随机选取50株土茯苓种苗进行调查，首先应用相关分析确定苗木分级指标，然后通过逐步聚类分析法修正分级，最终计算出土茯苓种苗的苗木分级标准。结果表明，根数和球茎数为土茯苓种苗的质量分级指标。土茯苓种苗分级标准为Ⅰ级种苗：根数≥37.4，球茎数≥6.8；Ⅱ级种苗：28.3≤根数＜37.4，4.2≤球茎数＜6.8；Ⅲ级种苗：根数＜28.3或球茎数＜4.2。所抽取的土茯苓样苗中，Ⅰ、Ⅱ级种苗(合格苗)分别占34%和20%，Ⅲ级种苗(不合格苗)占46%。本研究通过逐步聚类分析法制定的土茯苓种苗质量分级标准结果可靠，说明此方法可行，能为土茯苓人工种植繁育研究以及生产优质的土茯苓种苗提供理论资料。

Abstract:

The quality grading standard of Smilax glabra seedlings was explored to lay a foundation for the standardized development of S.glabra artificial planting.In this study,50 seedlings of S.glabra were randomly selected for investigation.Firstly,the seedling classification index was determined by correlation analysis,and then the grading was modified by stepwise clustering analysis.Finally,the seedling grading standard of S.glabra was calculated.The results showed that the number of roots and corms were used as the quality grading indexes of S.glabra seedlings,and the grading standards were obtained as follows:gradeⅠseedlings:root number ≥37.4,corm number ≥6.8;grade Ⅱ seedlings:28.3≤root number ＜37.4,4.2≤corm number ＜6.8;grade Ⅲ seedlings:roots number＜28.3,corms number＜4.2.Among the selected S.glabra seedlings,grade Ⅰ and Ⅱ seedlings (qualified seedlings) accounted for 34% and 20%,respectively,and grade Ⅲ seedlings (unqualified seedlings) accounted for 46%. In this study,the results of the quality grading standard of S.glabra seedlings established by stepwise cluster analysis were reliable,which indicated that this method was feasible and could provide theoretical data for the study of artificial cultivation and breeding of S.glabra and the production of high-quality S.glabra seedlings.