河西地区盐碱地甜高粱农艺性状灰色关联度评价

Evaluation of Agronomic Characteristics of Sweet Sorghum by Gray Relational Analysis in Saline-alkali Soil in Hexi Area

采用灰色关联度分析法,选择出苗率、株高、茎粗、叶片数、分蘖数、茎秆糖锤度、单株鲜重及鲜草产量等作为评价指标,综合分析11个甜高粱品种(系)在河西地区盐碱地的农艺性状表现。结果表明,中科甜30号加权关联度最高,为0.831,综合优于其他品种(系),具体表现为出苗好、长势佳、含糖高、丰产;中科甜4号和中科甜2号加权关联度分别为0.765、0.690,位居第2、3位。该方法能够全面客观地分析品种的综合性状,避免以往品种比较试验中仅以某一因素为主、其它性状凭主观判断来评价品种的局限性,适于甜高粱等需多目标考察的分析对象。

In order to comprehensively evaluate agronomic characteristics of sweet sorghum in saline-alkali soilin Hexi erea, agronomic character expression of 11 varietieties of sweet sorghum were analyzed by gray relationalanalysis, meanwhile emergence rate, plant height, stem diameter, number of leaves, number of tillers, sugar brix,fresh weight per plant and fresh forage yield were selected as evaluation indexes. The results showed thatZhongke 30 was the best variety with the highest weighted relational grade （0.831） and the excellentcharacteristics of good emergence, good growth, high sugar content and high yield. The weighted relational gradeof Zhongke4 and Zhongke2 was 0.765 and 0.690, respectively, which occupied the second and third place. Themethod can comprehensively and objectively analyze the integrated traits of cultivars, to avoid the limitation thataccording to the only one major factor or other traits by subjective judgment, it is suitable for the analysis objectsrequiring multiple-objective investigation such as sweet sorghum.