欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2019, Vol. 30 ›› Issue (8): 2591-2599.doi: 10.13287/j.1001-9332.201908.027

• • 上一篇    下一篇

地形因子对黄土高原山杏叶片功能性状的影响

王雪艳, 曹建军*, 张小芳, 孔莹莹, 田泓, 李梦天, 许雪赟, 龚毅帆   

  1. 西北师范大学地理与环境科学学院, 兰州 730070
  • 收稿日期:2018-08-27 出版日期:2019-08-15 发布日期:2019-08-15
  • 通讯作者: * E-mail: caojj@nwnu.edu.cn
  • 作者简介:王雪艳,女,1994年生,硕士研究生.主要从事环境工程与草地生态学研究.E-mail:wangxueyan@163.com
  • 基金资助:
    国家自然科学基金项目(41461109)、甘肃省自然科学基金重大项目(18JR4RA002)、中国科学院内陆河流域生态水文重点实验室开放基金项目(KLEIRB-ZS-16-01)和中国科学院寒旱区陆面过程与气候变化重点实验室开放基金项目(LPCC2018008)

Effects of topographic factors on leaf traits of apricot in the Loess Plateau, Northwest China

WANG Xue-yan, CAO Jian-jun*, ZHANG Xiao-fang, KONG Ying-ying, TIAN Hong, LI Meng-tian, XU Xue-yun, GONG Yi-fan   

  1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China.
  • Received:2018-08-27 Online:2019-08-15 Published:2019-08-15
  • Contact: * E-mail: caojj@nwnu.edu.cn

摘要: 坡向和坡度是重要的地形因子,调控水、热组合可以影响植物生长及叶片功能性状.研究叶片功能性状对不同地形因子的响应,有助于了解植物对环境的适应策略.以阳坡(半阳坡)和阴坡(半阴坡)2个坡向,以及15°~20°、21°~25°和26°~30° 3个坡度为环境梯度,对比研究了其对黄土高原主要造林树种山杏叶片功能性状(包括叶面积、比叶面积、叶干物质含量和叶片含水量)的影响,结果表明: 1) 坡向与坡度分别对所有叶片功能性状的影响均显著,坡向和坡度仅对叶片含水量具有交互作用. 2)坡向梯度上,阳坡叶片的叶面积与阴坡相当,但叶干物质含量(0.24 g·g-1)和叶片含水量(59.6%)均小于后者(0.27 g·g-1和67.0%);阳坡叶片的比叶面积显著高于阴坡,其值分别为183.72和163.05 cm2·g-1. 3)坡度梯度上,叶片的比叶面积和叶面积均随坡度增大呈先减后增趋势,二者分别在15°~20°和26°~30°上达最大值,分别为184.04 cm2·g-1和21.14 cm2. 4)除15°~20°与26°~30°的土壤水分无差异外,其余坡度以及坡向之间的土壤水分均存在显著差异,且土壤水分是造成叶片功能性状差异的主要原因之一,其中0~10 cm土层含水量对叶片功能性状的影响最大. 5)叶片比叶面积与叶片含水量、叶干物质含量呈负相关,与叶面积呈正相关;叶干物质含量与叶片含水量呈正相关,与叶面积呈负相关;土壤含水量仅与叶片含水量呈正相关,与其他叶片功能性状均不相关.

Abstract: As important topographic factors, slope aspect and gradient affect plant growth and leaf functional traits by regulating the combination of water and heat. Exploring the response of leaf functional traits to topographic factors is helpful for understanding plant adaptation strategies. We investigated the effects of sunny slope (including half sunny slope) and shady slope (including half shady slope) and three slope gradient (15°-20°, 21°-25°, and 26°-30°) on the leaf functional traits of apricot (Prunus armeniaca L.), the main afforestation tree species on the Loess Plateau. The results showed that: 1) Slope aspect and gradient exerted significant effects on all functional traits. Except leaf water content (LWC), other leaf functional traits were not affected by the interaction of slope aspect and gradient. 2) The leaf area (LA) under the sunny slope was equivalent to that under the shady slope. Leaf dry matter content (LDMC) and LWC (0.27 g·g-1 and 67.0%, respectively) were significantly higher under the shady slope than under the sunny slope (0.24 g·g-1 and 59.6%, respectively), while specific leaf area (SLA) (163.05 cm2·g-1) was significantly lower under the former than under the latter (183.72 cm2·g-1). 3) At different slope gradients, SLA and LA reached a maximum value at 15°-20° (184.04 cm2·g-1) and 26°-30° (21.14 cm2), respectively. 4) Except no difference in soil water content (θ) between 15°-20° and 26°-30°, it differed significantly between two slope aspects and among other slope gradients. The θ was one of the main factors causing the differences in functional traits, especially in the 0-10 cm soil layer. 5) SLA was negatively correlated with LWC and LDW and positively correlated with LA. LDW was positively correlated with LWC and negatively correlated with LA. θ was positively correlated with LWC but not with other leaf functional traits.