摘要
旨在建立玉米苗期耐盐性有效评价方法,通过梯度微咸水处理和多元统计分析方法对10份玉米品种的苗期耐盐性进行了系统评价。四分位差分析结合玉米耐盐阈值分析表明耐盐鉴定的最佳胁迫浓度为0.5%。利用主成分分析和隶属函数分析可将7个农艺性状的耐盐系数转化为隶属函数耐盐性综合评价值(D值)。结合聚类分析可将玉米苗期耐盐等级划分为:高耐、耐、中等、敏感、高敏。利用逐步回归分析方法建立了D值与7个农艺性状耐盐系数的回归方程:D=-1.147+0.823*长径+0.713*株高。上述研究为评判玉米苗期耐盐性提供了科学方法。
In order to establish an effective evaluation method for salt tolerance of maize at seedling stage,the salt tolerance of 10 maize varieties at seedling stage was systematically evaluated through gradient brackish water treatment and multivariate statistical analysis.Interquartile range analysis combined with salt-tolerant threshold analysis showed that the optimal concentration of saline treatment for salt tolerance identification was 0.5%.With principal component analysis and membership function analysis,the salt tolerance coefficient of 7 agronomic traits could be converted into comprehensive membership function value for salt tolerance evaluation(D value).Combined with cluster analysis,the salt tolerance grade of maize at seedling stage could be divided into high tolerance,tolerance,medium tolerance,sensitivity and high sensitivity.The regression equation between D value and salt tolerance coefficient of 7 agronomic traits was established by stepwise regression analysis:D=-1.147+0.823*long diameter+0.713*plant height.The above research can provide a scientific method for evaluating the salt tolerance of maize at seedling stage.
作者
李俊萍
王秀萍
刘素娟
鲁雪林
吴哲
LI Junping;WANG Xiuping;LIU Sujuan;LU Xuelin;WU Zhe(Rongcheng Agricultural and Rural Affairs Bureau of Hebei,Baoding,Hebei 071700;Hebei Saline-alkali Land Greening Technology Innovation Center,Tangshan,Hebei 063299;Institute of Coastal Agriculture,Hebei Academy of Agriculture and Forestry Sciences,Tangshan,Hebei 063299;Hebei Seed Management Station,Shijiazhuang 050051)
出处
《中国农学通报》
2022年第18期28-34,共7页
Chinese Agricultural Science Bulletin
基金
河北省农林科学院农业科技创新工程“滨海盐碱地资源化利用及提质增效关键技术创新”(2019-1-6)。
关键词
玉米
耐盐鉴定
隶属函数
评价方法
种质资源
maize
salt tolerance identification
membership function
evaluation method
germplasm resource
