不同类别湖北麦冬种苗生长发育状况的比较

Comparison of development condition of different Liriope spicata seedlings

该研究根据湖北省襄阳市当地农户的生产经验,结合湖北麦冬的生长发育实际状况,初步确定湖北麦冬种苗分类的主要指标,对其进行K聚类分析后,将湖北麦冬单株种苗分为以下2类:Ⅰ类种苗为根系直径大于2.5 mm、新生芽数目大于3、具有跑马根且着生于最外层的短苗龄新苗;Ⅱ类种苗为根系直径小于1 mm、新生芽数目小于2、不具备跑马根且着生于最内层的长苗龄老苗。该研究调查了湖北麦冬生长期间的地上部指标、根部指标及块根产量和品质,试验结果表明Ⅰ类湖北麦冬种苗的生长发育状况较好,且块根产量较高,品质较好。该研究确定了对湖北麦冬生长发育有影响的主要分类指标,从而为湖北麦冬种苗分级标准的制定奠定了基础。

The study identified the main morphological index of the seedlings classification including seedling age,the root width and number of newborn buds and coarse roots, according to the local agricultural production techniques and assessment of Liriope spicata＇s growth and development condition. After carrying on K cluster analysis of the morphological, we separated the seedlings into two levels. The first level （Ⅰ）：the new talent with the root width exceeding two point five millimeters, the new born buds exceeding three, and with the coarse root exceeding one. The second level （Ⅱ）：the old talent with the root width below one millimeters, the newborn buds below two and without coarse root. The study surveyed the plants＇ growth index dynamics, as well as the yield and quality of the tuberous root. The experimental results suggested that the growth condition of seedling Ⅰwas better, the yield of earthnut higher, the quality of earthnut more excellent. The study lied the foundation of L. spicata＇s grading standards and standardized production.