基于主成分分析的木薯抗旱栽培措施的综合评价

摘要

研究4种栽培措施在中度水分胁迫条件下的综合抗旱效果.木薯苗期干旱胁迫7d后,测定干旱胁迫和正常供水条件下木薯的干物率、根冠比、叶片相对含水量、质膜透性、叶绿素、类胡萝卜素、可溶性糖、脯氨酸、可溶性蛋白含量,并对上述指标的抗旱系数进行主成分分析与综合评价.结果表明:前3项主成分的累积方差贡献率可反映原信息量的87.47％,不同处理的主成分分析综合得分排序为:2％石灰水浸种(0.773)＞施用保水剂(0.687)＞种茎蜡封(0.477)＞CK(0.249).%The effect of drought resistance for 4 treatments was analyzed under moderate stress conditions in the paper.Content of dry matter,root to top ratio (R/T ratio),leaf relative water content,membrane permeability,chlorophyll,carotenoid,soluble sugar,proline and soluble protein content were measured at 7th day after drought stress and the drought-resistance effect of 4 treatments were analyzed by principal component analysis and comprehensive evaluation.The results showed that the cumulative variance contribution rate of three principle components were reflected the 87.47％ of the original information.And the comprehensive score of principal component analysis in 4 treatments were as follows:2％ of limewater soaked (0.773) ＞ application of super absorbent polymers (0.687) ＞ stem wax (0.477) ＞ CK (0.249).