| 美国栎属种源引种,变异研究：幼树年高生长节律和物候期的变异 |
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| 引用本文： | 汪企明,王豁然.美国栎属种源引种,变异研究：幼树年高生长节律和物候期的变异[J].江苏林业科技,2000,27(4):1-6. |
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| 作者姓名： | 汪企明 王豁然 |
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| 作者单位： | [1]江苏省林业科学研究院,江苏南京 [2]中国林业科学研究院,北京 |
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| 基金项目： | 国家林业局“948”引进项目 |
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| 摘 要： | 对定植在江苏省林业科学研究院苗圃（南京）内的美国栎属３个树种，１９个种源、家系（包括柳叶栎９个种源、家系，北方红栎６个家系，红栎４个种源）的２年生幼树进行了年高生长节律和物候期（包括展叶期、叶变色期和落叶期）的定期观测（分别每３～１５ｄ观测１次）。结果表明：（１）３个树种在南京年高生长节律差异显著。柳叶栎在生长期内抽梢次数较多，在５次以上，基本呈连续生长趋势。生长节律呈快（５月）－慢（６月）－最快
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| 关 键 词： | 年高生长节律 变异 物候期 美国栎属种源 引种 |
Studies on the variations of provenances and families in the Genus Quercus of American:variations in the annual height growth rhythm and phenological phase in two year old saplings |
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| Abstract: | Two year old saplings of American Oak 3 species and 19 provenances and families (including 9 provenances and families of Quercus phellos, Wellow Oak;6 families of Q rubra L., Northern Red Oak;4 provenances of Q.coccinea, Scarlet Oak)were grown for observation of annual height growth rhythem and phenological phase in March 1999 on a nursery in Jiangsu Academy of Forestry,Nanjing China.Sapling annual height growth,leaves expansion,leaves colour changes and leaves fall were recorded every 3 to 15 days during growing seasons(from April to November in 1999).The results of observation showed that there were significant differences among species,provenances and families.(1)Annual height growth rhythm:Wellow Oak has more than 5 times of shoot growth flush and growth is continual.The growth rhythm was fast(in May) to slow (in June) to most fast(in July to August) to slow(in September).Shoot growth of Northern Red Oak and Scarlet Oak is episodic and has 1 to 4 times of shoot growth flush.The growth rhythm was growth to rest to growth to rest.(2)Phenological phase:leaves expansion in Wellow Oak is more early than Scarlet Oak and Northern Red Oak is latest.Leaves turning red in Scarlet Oak in autumn is most early and longest and Wellow Oak is latest.Leaves fall in Northern Red Oak is more early than Wellow Oak and Scarlet Oak is latest. |
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| Keywords: | Quercus phellos Q rubra L Q coccinea Annual height growth rhythm Leaves expansion Leaves colour changes Leaves fall |
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