利用灰色关联度分析筛选朝天椒适宜的植物抗旱剂

为提高朝天椒生长的抗旱能力,筛选出适合朝天椒的抗旱剂及其最佳施用浓度。选择不同浓度的富里酸、多效唑和烯效唑3种抗旱剂,分别采用叶面喷洒方式,设置了土壤含水量正常组、干旱组以及抗旱剂处理的干旱组,共11组。检测了朝天椒17项生理生长指标,采用灰色关联度法进行综合分析。与干旱组比较,使用不同浓度的3种抗旱剂,不同程度地提高了朝天椒的抗旱能力。与正常组比较,朝天椒12个生理指标和5个生长指标的关联度序值(综合分析)大小不同,但综合分析表明,300 mg·L^-1富里酸组(R₄)抗旱功能最好,其次为24 mg·L^-1烯效唑组(R₁₀),再次为24 mg·L^-1多效唑组(R₇),达到甚至超过正常组的生理机能。灰色关联分析法具有信息损失小、计算简便、综合性强等优势,值得借鉴应用。

Selection of suitable drought tolerance agents for Capsicum frutescens by grey correlation analysis

Different concentration of fulvic acid,paclobutrazol and uniconazole were sprayed on leaves for selecting suitable agent and optimal concentration for improving drought tolerance of Chaotian pepper(Capsicum frutescens var.conoides).There were 11 groups including normal soil water,drought and drought treated with drought tolerance agent,for the experiment.Seventeen physiological growth indexes of Capsicum frutescens were assayed.The grey correlation method is used for comprehensive analysis.Compared with the drought group,the drought tolerance was improved by using different concentrations of three drought tolerance agents.Compared with the normal group,the order of correlation degree of 12 physiological indexes was R₄>R₁₀>R₇>R₂>R₈>R₆>R₅>R₉>R₁>R₃.The order correlation degree of the five growth indexes was R₄>R₁₀>R₇>R₃>R₉>R₆>R₂>R₈>R₅>R₁.The results showed that fulvic acid 300 mg·L^-1 Group(R₄)had the best drought tolerance,followed by uniconazole 24 mg·L^-1 Group(R₁₀),paclobutrazol 24 mg·L^-1 Group(R₇),the physiological function reached or even exceeded normal group.The grey correlation analysis method has the advantages of less information loss,simple calculation and strong comprehensiveness,especially suitable for the comprehensive analysis of multi-index and multi research object.