辣椒种苗质量分级与壮苗指数构建  

Quality grading of pepper seedlings and construction of seedling index

作　　者：潘佳琪 彭铁梨 贾媛婕 胡晓辉[1,2] PAN Jiaqi;PENG Tieli;JIA Yuanjie;HU Xiaohui(College of Horticulture,Northwest A&F University,Yangling 712100,China;Key Laboratory of Protected Horticultural Engineering in Northwest,Ministry of Agriculture and Rural Affairs/Shaanxi Facility Agricultural Engineering Technology Research Center,Yangling 712100,China)

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100 [2]农业农村部西北设施园艺工程重点实验室/陕西省设施农业工程技术研究中心,陕西杨凌712100

出　　处：《中国农业大学学报》2024年第2期91-98,共8页Journal of China Agricultural University

基　　金：陕西省重点研发计划项目(2022ZDLNY03-11);国家现代农业产业技术体系项目(CARS-23-D06);中央引导地方项目(XZ202202YD0002C)。

摘　　要：为综合且精确评价辣椒种苗质量,利用K-均值聚类法和综合评价法,对50 d苗龄的‘早熟红线椒’和‘加长六号’这2个品种的辣椒苗进行研究。结果表明:‘早熟红线椒’和‘加长六号’2个品种辣椒幼苗综合评价指数范围在0.333~0.996;利用主成分分析将11项指标分成2类主成分,累计贡献率为75.8%。将综合评价指数和壮苗指数进行相关性分析,筛选出4个相关性较高的壮苗指数模型:“地下部干重×散坨率×全株干质量”、“地下部鲜重×散坨率×全株干质量”、“全株鲜重×散坨率×全株干质量”和“相对叶绿素含量(SPAD)×散坨率×全株干质量”,相关性分别为0.673、0.690、0.657和0.701;最优壮苗指数模型为“地下部鲜重×散坨率×全株干质量”。根据筛选出的壮苗指数模型得到:综合评价指数≥0.813,壮苗指数≥1.255属于优质苗(Ⅰ级);综合评价指数范围在0.507~0.813,壮苗指数范围在0.102~0.682属于合格苗(Ⅱ级);综合评价指数≤0.507,壮苗指数≤0.102属于弱苗(Ⅲ级)。本研究可为辣椒的工厂化育苗、机械化作业提供优质种苗评价体系和种苗分级依据。To comprehensively and accurately evaluate the quality of pepper seedlings,the K-means clustering method and comprehensive evaluation method were used to study the 50 day old pepper seedlings of two caltivars,‘Early Mature Red Line Pepper’and‘Jia chang No.6’.The results indicated that:The comprehensive evaluate index of both‘Early Mature Red Line Pepper’and‘Jia chang No.6’ranges from 0.333 to 0.996;The principal component analysis divided 11 indicators employed in this study into 2 types of principal components,with a cumulative contribution rate of 75.8%.Correlation analysis was conducted between the comprehensive evaluation index and the strong seedling index,and four models with high correlation were selected for the seedling index,which were‘Dry weight of underground part×Scattered lump rate×Dry weight of whole plant’,‘Fresh weight of underground part×Scattered lump rate×Dry weight of whole plant’,‘Fresh weight of whole plant×Scattered lump rate×Dry weight of whole plant’,‘SPAD×Scattered lump rate×Dry weight of whole plant’,and the correlations were 0.673,0.690,0.657 and 0.701,respectively.In conclusion,the optimal seedling strength index model is“Fresh weight of underground part×Scattered lump rate×Dry weight of whole plant”.Based on the selected robust seedling index model,it was concluded that:The comprehensive evaluation index≥0.813 and the strong seedling index≥1.255 belongs to high-quality seedlings(GradeⅠ);The comprehensive evaluation index range is 0.507-0.813,and the strong seedling index range is 0.102-0.682,which belongs to qualified seedlings(Grade II);The comprehensive evaluation index≤0.507 and the strong seedling index≤0.102 belongs to weak seedlings(GradeⅢ).In a word,this study provides a high-quality seedling evaluation system and a basis for seedling grading for industrial seedling and mechanized operations of fruity vegetables or other vegetables.

关 键 词：辣椒幼苗 散坨率 壮苗指数 主成分分析 

分 类 号：S626.9[农业科学—园艺学]