摘要
在综合评价电场强度及处理时间对作物生物效应影响时,如何确定生物效应指标之间的权重一直是困扰生物信息综合评价的核心问题。比如叶绿素增长1mg·L–1的价值相当于多少厘米根长的增加,这是一个难以回答的问题。同时,通过指标加权合成的方法获得综合评价的结果也存在信息丢失的缺陷。针对电场条件对作物生物效应的影响,利用数据包络分析的基本思想,给出了用于综合评价电场强度及处理时间对作物生物效应影响的非参数综合分析方法和相应的数学模型,该方法不仅可以克服上述缺点,而且还为分析不同外部条件对作物综合生物效应的影响程度提供了一种有效的分析工具。应用该方法综合评价了不同电场强度和不同处理时间对小麦(Triticumaestivum)种子幼苗株高和根长的影响。结果表明:不同电场强度和处理时间对小麦幼苗生长产生不同影响,在0.5–6.0kV·cm–1场强范围内,随电场强度增加,生理指标呈现振荡性变化,当处理时间为5分钟时,1.0和2.0kV·cm–1场强为最佳处理条件;处理时间为10分钟时,2.5kV·cm–1场强为最佳处理条件。
When evaluating the comprehensive effect of processing time and electric field intensity on crops, the core issue of how to determine the index weights has confounded the comprehensive evaluation of biological information. It is difficult to determine the equivalence of 1 mg·L–1 chlorophyll to centimeters of root length. As well, comprehensive evaluation by a weighting sum method may lose some information. Therefore, to determine the comprehensive effects of the electric field condition on crops, we use the basic idea of data envelopment analysis to propose a non-parametric comprehensive analysis method and a corresponding mathematical model for evaluating the comprehensive effects of processing time and electric field intensity on crop growth. This method can overcome above shortcomings and provides an effective tool to analyze the degree of influence of external conditions on biological effects. Finally, we use this method to analyze the comprehensive effects of different electric field intensity and processing time on seedling height and root length of wheat. Different electric field strength and processing time has variable influence on seedling growth, and the change in indexes of biological effects is vibration with increasing electric field from 0.5 to 6.0 kV·cm–1. With processing time of 5 min, the best processing condition is field strength 1.0 and 2.0 kV·cm–1. With processing time 10 min, the best processing condition is field strength 2.5 kV·cm–1.
出处
《植物学报》
CAS
CSCD
北大核心
2010年第3期384-391,共8页
Chinese Bulletin of Botany
基金
国家自然科学基金(No.70501012
No.70961005)
内蒙古自治区自然科学基金(No.20080404MS1010)
关键词
综合评价
数据包络分析
电场
幼苗生长
小麦种子
comprehensive evaluation
data envelopment analysis
electric field
seedling growth
wheat seed
