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首页> 外文期刊>Plant and Soil >Important foliar traits depend on species-grouping: analysis of a remnant temperate forest at the Keerqin Sandy Lands, China
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Important foliar traits depend on species-grouping: analysis of a remnant temperate forest at the Keerqin Sandy Lands, China

机译：重要的叶性状取决于物种分组：对中国科尔沁沙地的一片温带森林的分析

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摘要

Foliar traits are often interpreted to reflect strategies for coping with water and nutrient supply limitations. In this study, we measured several important leaf traits for 147 species sampled from a remnant, temperate deciduous broad-leaved forest in Keerqin Sandy Lands, Northeast China to test whether these traits are ‘invariant’ or dependent on water supply limitations. Our data show that average specific leaf area (SLA), nitrogen (N) and phosphorus (P) concentrations, leaf C/N, C/P and N/P were 273 cm2 g−1, 18.1 mg g−1, 1.60 mg g−1, 28.2, 343 and 12.4, respectively. However, most of these traits were significantly different (P < 0.05) for different species groupings based on growth forms, phylogenetic history, photosynthetic pathways, or habitats. SLA was positively correlated with leaf P concentration across the broad spectrum of 118 species and most species functional groupings. However, SLA was not correlated with N concentration across all species or within each species functional group. SLA and N and P concentrations in dry habitats were lower than those in wet habitats, whereas leaf C/N, C/P, and N/P had the opposite trend both across all species and within major species functional groupings (herb, monocots and C3 species). Our data indicate that SLA vs. leaf N and SLA vs. P relationships may be regulated differentially for different species functional groupings and that water limitation may have a greater influence than nutrient limitation for plant growth.
机译：人们通常将叶片性状解释为反映应对水和养分供应限制的策略。在这项研究中，我们测量了147个物种的几种重要叶片性状，这些物种选自中国东北科尔沁沙地的一片残留，温带落叶阔叶林，以测试这些特征是否“不变”或取决于供水限制。我们的数据表明，平均比叶面积（SLA），氮（N）和磷（P）浓度，叶片C / N，C / P和N / P为273 cm 2 g -1 ，18.1 mg g -1 ，1.60 mg g -1 ，28.2、343和12.4。但是，根据生长形式，系统发育史，光合途径或生境，对于不同物种分组，大多数这些性状差异显着（P <0.05）。 SLA与118种物种和大多数物种功能组的广谱叶片P浓度呈正相关。但是，SLA与所有物种或每个物种功能组内的氮浓度均不相关。干旱生境中的SLA，N和P浓度低于湿生境中的SLA和N，P浓度，而所有物种以及主要物种功能组（草本，单子叶植物和C3种）。我们的数据表明，SLA与叶N的关系以及SLA与P的关系可能因不同物种功能组而受到不同调节，并且水分限制对营养的影响可能大于营养限制对植物生长的影响。

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