科尔沁沙地中南部34种植物叶功能性状及其相互关系

被引：59

作者：

周欣 ^{[1
,2
]}

左小安 ^{[1
]}

赵学勇 ^{[1
]}

刘川 ^{[2
]}

吕朋 ^{[1
,2
]}

机构：

[1] 中国科学院寒区旱区环境与工程研究所奈曼沙漠化研究站

[2] 中国科学院大学

来源：

中国沙漠 | 2015年 / 35卷 / 06期

关键词：

功能性状; 生活型; 光合途径; 比叶面积; 叶干物质含量;

D O I：

暂无

中图分类号：

Q944.3 [植物生态形态学];

学科分类号：

071001 [植物学];

摘要：

以科尔沁沙地中南部34种主要植物为研究对象,分别测定叶片鲜重(FW)、干重(DW)、干物质含量(LDMC)、面积(LA)和比叶面积(SLA),比较不同生活型(一二年生草本、多年生草本、灌木)和功能型(C3、C4植物)的叶片性状的差异性,探讨沙地植物叶片性状相互之间的内在联系及其对环境的适应性。结果表明:一二年生草本的LDMC(0.23g·g-1)显著小于多年生草本(0.31g·g-1)和灌木(0.32g·g-1);而一二年生草本的SLA(22.14m2·kg-1)显著大于多年生草本(17.18m2·kg-1)和灌木(13.41m2·kg-1)。一二年生和多年生C4植物的LDMC显著大于C3植物;多年生C4植物SLA显著大于C3植物;C3植物的LDMC表现为一二年生草本<多年生<灌木。沙地植物的叶鲜重、叶干重和叶面积三者间极显著正相关,植物叶干重与SLA显著负相关;C4植物和多年生植物叶干重与SLA显著负相关。沙地不同生活型、功能型植物叶片的功能性状差异明显,沙地灌木和多年生植物能够较强的适应干旱环境,一二年生草本则具有较强的保持体内营养和获取土壤资源的能力。

引用

页码：1489 / 1495

页数：7

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