28个草地早熟禾品种坪用性状评价

对来自荷兰百绿、美国及丹麦的草地早熟禾28个品种的坪用质量性状进行了研究和评价。单项测定结果表明：各品种质量性状之间存在极显著差异或可明显区分出不同类型。其中,密度最高为Limousine和Elysee(1.45枝条数／cm2),次之为Cynthia(1.02枝条数／cm2);盖度最高为Monoply(87．1％),其次为Wembley(75．0％);质地测定中叶片最窄为Elysee和Limousine(分别为2．57mm和2．74mm),Compact位居第二;生长习性测定结果百绿品种占据半直立型(Julia)、半匍匐型(Sydspor)及中等3种类型,美国和丹麦品种仅有中等类型;颜色测定百绿品种呈浅绿、中绿、深绿3种类型,丹麦和美国品种分别为中绿和深绿、浅绿和中绿2种类型;冬末枯黄表征测定中表现轻微枯黄的品种仅有百绿品种Entopper,其余品种表现为中或重;青绿期最长的品种Fylking(336d)和较长品种Balin,Bar 5649,Conni,Entopper,Monoply(333d)均为百绿品种。依据对密度、盖度、质地、颜色、冬末枯黄表征及青绿期6个主要性状测定值的加权平均进行品种质量性状的聚类分析,认为可将28个品种分为密集纤细型、中等型和稀疏粗糙型3种类型,百绿品种在各类型中均有代表品种。

Turf use quality characteristic assessment for 28 varieties of Poa pratensis

The turf quality characteristics of 28 Poa pratensis varieties introduced from overseas were studied and evaluated. Single factor measurement results showed very significant quality characteristic differences between varieties, and they could easily be classified into different types. Varieties with the highest density were Limousine and Elysee (1.45 shoots/cm2), followed by Cynthia (1.02 shoots/cm2). Monopoly had the highest coverage (87.1%), followed by Wembley (67.7%). Elysee and Limousine had the narrowest leaves (2.57 mm and 2.74 mm, respectively), followed by Compact. Growth habits showed three forms, namely, semi-perpendicular (including Julia), semi-creeping (including Sydspor), and a middle type growth form. There were five color types. Only one variety had slight winter yellowing and withering (Entopper). The remaining varieties showed medium or severe symptoms. Fylking showed the longest green period (336 d), followed by Balin, Bar 5649, Conni, Entopper, and Monopoly (333 d). The results of cluster analysis using the weighted averages of 6 main quality characteristics indicated that the 28 varieties could be divided into three types, namely, dense and fine type, medium type, and sparse coarse type.