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Evaluations of Magnolia grandiflora selections in south-central Alabama, U.S.

机译:在美国阿拉巴马州中南部对大木兰选择的评估

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摘要

In December 1983, 12 southern magnolia (Magnolia grandiflora L.) selections were added to a comprehensive tree evaluation project at the Piedmont Substation in Camp Hill, Alabama, U.S., in USDA Plant Hardiness Zone 7b. Growth rates were determined annually. Cultivars 'Margaret Davis' and 'Smith Foglc' along with seedling selections from a native population near Mobile, Alabama, demonstrated the greatest overall annual growth after the first 18 years of the study. Foliar characteristics were evaluated in September 2000. The seedling selections and 'Majestic Beauty' had the greatest mean leaf area, with 'Little Gem' the smallest. Cultivars 'Bracken's Brown Beauty', 'Hassc', and 'Little Gem1 had the most tomentose (considered "brown" in industry) abaxial leaf surface, which is considered a highly desirable trait. In 'Majestic Beauty', seedlings, Aldridge, and 'Smith Fogle', the abaxial leaf surfaces were the most glabrous (considered "green"), generally regarded as a less desirable trait.
机译:1983年12月,在美国阿拉巴马州坎普希尔(Camp Hill)的皮埃蒙特变电站(Piedmont Substation),在美国农业部植物抗性区7b中,将12种南部木兰(Magnolia grandiflora L.)选种加入了综合树木评估项目。每年确定增长率。品种“玛格丽特·戴维斯(Margaret Davis)”和“史密斯·福格(Smith Foglc)”以及在阿拉巴马州莫比尔附近的当地居民中选择的幼苗,在研究的前18年中表现出最大的整体年度增长。在2000年9月评估了叶片的特性。幼苗的选择和'雄伟的美丽'的平均叶面积最大,而'小宝石'的最小。品种'Bracken's Brown Beauty','Hassc'和'Little Gem1'具有最多的绒毛(在工业中被认为是“棕色”)的背面叶表面,这被认为是非常理想的性状。在“雄伟的美丽”,幼苗,Aldridge和“ Smith Fogle”中,背面的叶子表面是最无毛的(被认为是“绿色”),通常被认为是不太理想的性状。

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