摘要
为了制定合理适用的油用‘凤丹’牡丹播种苗分级标准,本研究在陕西、安徽、山东、山西等‘凤丹’主产区,对1~3年生播种苗生长进行了系统抽样调查,通过相关性分析与主成分分析研究可作为种苗质量分级的指标,然后采用K-均值聚类法对种苗进行分级,再利用聚类中心±标准差法确定每个等级的临界值。结果表明,苗高、地径与根粗可作为种苗质量分级的指标,可把‘凤丹’牡丹合格播种苗划分为三个等级。
In order to set up the classification standard for ‘Feng Dan’ seedlings, this study surveyed 1~3 years old seedlings in their main producing areas, including Shaanxi, Anhui, Shandong and Shanxi province, etc. The elements in seedling classification were selected by correlation analysis and main factor analysis. K-means cluster analysis was used to classify the seedlings. The critical values of each class were determined by K-means cluster center ±standard deviation. The results showed that, seedling height, ground diameter and root diameter were applied in seedling classification. The qualified ‘Feng Dan’ seedlings were ranked into 3 classes.
出处
《农业科学》
2017年第7期506-513,共8页
Hans Journal of Agricultural Sciences
基金
陕西油用牡丹产业关键技术研究与示范项目(20140220)。
