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不同遮阴强度下白三叶形态特征和生长动态

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在田间自然光照下对黑龙江白三叶(Trifolium repens L.cv.‘Longping No.1’)进行不同梯度遮阴处理,测定其叶面积、叶面积绝对扩展率、比叶重、株高、生物量、根冠比等指标,分析在不同遮阴情况下白三叶的形态和生长的动态变化.结果表明:适度遮阴显著增加了黑龙江白三叶的叶面积、叶面积指数以及绝对扩展率,但重度遮阴对其起到抑制作用;比叶重随光照强度的增加而增加;遮阴促进植株的高度生长且对生物量有显著影响,轻度遮阴促进其生物量的增长,而中度、重度遮阴则降低生物量.黑龙江白三叶能较好忍耐30%左右的荫蔽度.
Effect of Light Intensity on Morphological Characteristic and Growth Index of Trifolium repens L.cv.‘Longping No.1’
The objectives of the study were to find out the effects of light intensity on morphological characteristics and growth index of Trifolium repensL, cv.‘Longping No.1’, and to provide a theoretical basis in rational use of its resources under different shade places.Leaf area, leaf area index, absolute ex pansion rate of leaf area, plant height, biomass, root to shoot ration of Trifolium repens L.cv.‘Long ping No.1' were tested in different shade conditions.The results showed that lighter shade significantly increased leaf area, leaf area index and absolute expansion rate of Trifolium repens L.cv.‘Longping No.1’, but severe shade played an inhibitory effect on these index.Specific leaf weight increased with the increase of light intensity.Shade had a significant effect on the biomass of Trifolium repens L.cv.‘Longping No.1’,moderate shade promoted its growth, but excessive shade inhibited its growth.Trifolium repens L.cv.‘Longping No.1’had some shade tolerance and grew well under about 30% shadeenvi ronment.

Trifolium repens L.cv.‘Longping No.1’ShadeGrowth indexMorphological characteristics

尹慧、安莹、陈雅君、陈阳、孙佳林、李静静、李艳侠

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东北农业大学园艺学院,黑龙江哈尔滨 150036

黑龙江白三叶 遮阴 生长指标 形态特征

黑龙江省科技攻关项目

GB06B112-5

2015

中国草地学报
中国农业科学院草原研究所 中国草地学会

中国草地学报

CSTPCDCSCD北大核心
影响因子:1.347
ISSN:1673-5021
年,卷(期):2015.37(5)
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