宁夏引黄灌区10个紫花苜蓿品种越冬性综合评价

Comprehensive evaluation of wintering characterizationof 10 alfalfa varieties in Ningxia YellowRiver Irrigation Area

摘要:

为评价紫花苜蓿不同品种在宁夏引黄灌区的越冬性能,测定了10个紫花苜蓿品种的株高、分枝数、根颈入土深度和根颈直径、干草产量等农艺性状,并使用灰色关联度法和系统聚类分析进行综合评价和分类。结果表明:紫花苜蓿6个农艺性状与越冬性关联度顺序依次为:干草产量>越冬率>株高>根颈直径> 根颈入土深度> 分枝数,灰色关联度为WL354HQ > WL903HQ > WL326GZ >WL353HQ> WL363HQ> WL343HQ > WL319HQ>WL366HQ>WL168HQ>WL298HQ;10个紫花苜蓿品种越冬性通过系统聚类分析可分为2大类4小类,以WL354HQ,WL903和WL326GZ品种在宁夏引黄灌区的越冬能力最强。

Abstract:

The wintering performance of different alfalfa (Medicago sativa) varieties was evaluated inYellow River Irrigation Area in Ningxia through measuring the agronomic traits (plant height,branch number,root crown depth and diameter) of 10 varieties.And the data were analyzed by using grey correlation methodand system cluster analysis for comprehensive evaluation and classification.The results showed that the order ofcorrelation degree of 5 agronomic traits and wintering rate of alfalfa was as follows: dry matter yield > winteringrate > plant height > root crown diameter>root crown depth > branch number,and the grey correlationdegree was WL354HQ>WL903>WL326GZ>WL353HQ>WL363HQ>WL343HQ>WL319HQ>WL366HQ>WL168HQ>WL298HQ.The wintering characterization of 10 alfalfa varieties could be divided into 2 groupsand 4 subgroups by systematic cluster analysis.The comprehensive analysis showed that the wintering ability ofWL326GZ,WL354HQ,WL903 and WL353HQ was strong.