ZENG Hongwen,WEN Zhongming,TAO Yu,et al.Sources of Variation of Functional Traits of Six Dominant Herbaceous Species in Yanhe River Basin[J].Research of Soil and Water Conservation,2018,25(05):364-370.
延河流域6种草本植物功能性状变异来源分析
- Title:
- Sources of Variation of Functional Traits of Six Dominant Herbaceous Species in Yanhe River Basin
- 分类号:
- Q948.112;Q948.114
- 摘要:
- 以延河流域中阿尔泰狗娃花、茭蒿、铁杆蒿、白羊草、大针茅、长芒草6种常见草本植物为研究对象，测定植物的10种易于测量且能反映生存策略的功能性状，包括比叶面积（SLA）、叶组织密度（LTD）、比根长（SRL）、根组织密度（RTD）、叶氮含量（LNC）、叶磷含量（LPC）、叶氮磷比（LNP）、根氮含量（RNC）、根磷含量（RPC）、根氮磷比（RNP），结合植物遗传背景和环境数据，研究植物功能性状对环境变化的响应，分析了植物功能性状变异的来源。结果表明：（1）不同气候条件下，除了叶组织密度LTD这一植物性状差异不显著外，其他功能性状均表现出显著差异；菊科的SLA，LNC，LPC，RNC，RNP显著高于禾本科，SRL显著低于禾本科。（2）植物物种和气候变化是性状变异主要来源，对研究的8个性状变异来源的影响程度进行排名，物种 > 年均降雨量 > 年均蒸发量 > 年均温度 > 坡度 > 坡位 > 海拔 > 坡向。（3）不同物种根据自身不同遗传背景和环境耐受性，在环境变化时调节自身性状的表达，以产生相应的生存策略。
- Abstract:
- This paper focused on six species of common herbaceous plants in Yanhe River Basin, including Heteropappus altaicus, Artemisia sacrorum, Artemisia giraldii, Stipa bungeana, Bothriochloa ischcemum, Stipa grandis. Ten investigated plant functional traits were specific leaf area (SLA), leaf tissue density (LTD), specific root length (SRL), root tissue density (RTD), leaf nitrogen concentration (LNC), leaf phosphorus concentration (LPC), leaf nitrogen phosphorus ratio (LNP), root nitrogen concentration (RNC), root phosphorus concentration (RPC) and root nitrogen phosphorus ratio (RNP). These 10 plant functional traits were chosen because they were easily measured and adequately reflected plant survival strategies. Combining with the data of plant genetic background and environmental factors, we analyzed the sources of plant functional traits variation. The results showed that:(1) under different climatic conditions, in addition to LTD, other functional traits presented the significant differences; SLA, LNC, LPC, RNC and RNP of Asteraceae were significantly higher than those of Poaceae, SRL was significantly lower than that of Poaceae; (2) plant species and climate changes were the main sources of variation, the ranking importance of 8 plant traits variation sources was in the order:species > annual precipitation > annual evaporation > annual temperature > slope > slope position > elevation > aspect; (3)according to different genetic backgrounds and environmental tolerances, different species regulate the expression of traits and produce the corresponding survival strategies to adapt to environmental changes.
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备注/Memo
收稿日期:2017-10-26;改回日期:2017-11-15。
基金项目:国家自然科学基金项目“黄土高原刺槐环境适应机制、成本与群落性状结构及功能变化”（41671289）
作者简介:曾鸿文(1993-),男,广东佛山人,硕士研究生,主要研究方向为黄土高原植被的预测与恢复。E-mail:a495688062@163.com
通讯作者:温仲明(1969-),男,陕西定边人,副研究员,博士,主要从事植被恢复重建与环境变化关系研究。E-mail:zmwen@ms.iswc.ac.cn