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当前位置: 首页 > 文章 > 狗娃花叶片生态化学计量特征及功能性状对坡向的响应 生态学杂志 2020 (6) 1946-1955
Position: Home > Articles > Responses of ecological stoichiometric characteristics and functional traits of Heteropappus hispidus to slope aspect Chinese Journal of Ecology 2020 (6) 1946-1955

狗娃花叶片生态化学计量特征及功能性状对坡向的响应

作  者：
牛亚琳;李空明;王雪艳;魏晨;王卫轩;苏昊海;张小芳;曹建军
单  位：
关键词：
坡向;狗娃花;生态化学计量特征;叶片功能性状
摘  要：
坡向对植物叶片生态化学计量特征及功能性状有显著影响。研究不同坡向上植物叶片生态化学计量特征与功能性状有助于了解植物对环境变化的响应及适应。以兰州地区狗娃花叶片为研究对象,分析其生态化学计量及功能性状随坡向的变化特征。结果显示:阳坡叶片C含量(408.12 g·kg~(-1))、C∶P(348.61)与N∶P(29.71)均显著高于阴坡(其值分别为400.75 g·kg~(-1)、196.69和16.60),N含量(34.81 g·kg~(-1))和C∶N(11.72)与阴坡无显著差异(其值分别为34.07 g·kg~(-1)和12.24),而P含量(1.67 g·kg~(-1))显著小于阴坡(2.56 g·kg~(-1));阳坡比叶面积及叶片含水量(10.55 cm2·g~(-1)、59.06%)与阴坡(9.70 cm2·g~(-1)、60.65%)无显著差异,叶干物质含量(0.14 g·g~(-1))和叶面积(0.31 cm2)均显著低于阴坡(0.15 g·g~(-1)、0.41 cm~2);不同坡向狗娃花叶片生长均受P限制;阳坡比叶面积、叶片含水量、叶面积分别是影响叶片C含量、N含量和叶片C∶N的主导因子;阴坡叶干物质含量是影响叶片C含量和P含量的主导因子,而叶片功能性状的4项指标对叶片N含量和C∶N均有影响,且叶面积为主导因子,比叶面积次之。研究表明,坡向对狗娃花叶片生态化学计量特征和功能性状均有影响,将二者结合研究有助于全面了解植物对环境的适应策略。
译  名：
Responses of ecological stoichiometric characteristics and functional traits of Heteropappus hispidus to slope aspect
作  者：
NIU Ya-lin;LI Kong-ming;WANG Xue-yan;WEI Chen;WANG Wei-xuan;SU Hao-hai;ZHANG Xiao-fang;CAO Jian-jun;College of Geography and Environmental Science,Northwest Normal University;
关键词：
slope aspect;;Heteropappus hispidus;;ecological stoichiometric characteristic;;leaf functional trait
摘  要：
Slope aspect has important effects on leaf ecological stoichiometric characteristics and functional traits. Uncovering ecological stoichiometric characteristics and leaf functional traits of plants under different slope aspects can enhance our understanding of the responses and adaptation strategies of plants to environmental change. We examined the changes in ecological stoichiometric characteristics and functional traits of leaves of Heteropappus hispidus from Lanzhou with slope aspect changing from sunny slope to shady slope. Leaf C content,leaf C ∶ P,and leaf N ∶P were greater under the sunny slope( 408.12 g·kg~(-1),348.61,29.71,respectively) than that under the shady slope( 400.75 g·kg~(-1),196.69,16.60,respectively). Leaf N content and leaf C ∶ N were similar but leaf P content was significantly lower under the former( 34.81 g·kg~(-1),11.72,and 1.67 g·kg~(-1),respectively) than under the latter( 34.07 g·kg~(-1),12.24,and 2.56 g·kg~(-1),respectively). Specific leaf area and leaf water content had no difference between sunny slope( 10. 55 cm~2·g~(-1) and 59. 06%,respectively) and shady slope( 9. 70 cm~2· g~(-1) and60.65%,respectively),while leaf dry matter content and leaf area were significantly lower under the sunny slope( 0.14 g·g~(-1) and 0.31 cm~2,respectively) than under the shady slope( 0.15 g·g~(-1) and 0.41 cm~2,respectively). The growth of H. hispidus in this area was mainly restricted by phosphorus availability. On the sunny slope,specific leaf area,leaf water content,and leaf area were the dominant factors affecting leaf C content,leaf P content,and leaf C ∶ N,respectively.On the shady slope,leaf dry matter content was the dominant factor affecting both leaf C content and leaf P content,and all four indicators of leaf functional traits had an effect on leaf N content and leaf C ∶ N,with leaf area being the first important factor,followed by specific leaf area. Our results indicated that slope aspect influenced the ecological stoichiometric characteristics and functional traits of leaves of H. hispidus. Thus,studies combining ecological stoichiometric characteristics and plant functional traits will be conducive to our comprehensive understanding of plant adaptation strategies.

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