马蔺体内主要阳离子含量月变化及分布

应用生态学报

马蔺体内主要阳离子含量月变化及分布

王咏^1,2;郭继勋¹;崔喜燕¹;韩德复¹

¹东北师范大学草地研究所植被生态教育部重点实验室, 长春 130024; ²东北师范大学城市与环境科学学院, 长春 130024

收稿日期:2007-10-17 修回日期:1900-01-01 出版日期:2008-06-20 发布日期:2008-06-20

Monthly dynamics and distribution of major cations in Iris lactea.

WANG Yong^1,2;GUO Ji-xun¹;CUI Xi-yan¹;HAN De-fu¹

¹Ministry of Education Key Laboratory of Vegetation Ecology, Grasslan
d Research Institute, Northeast Normal University, Changchun 130024, China; ²College of Urban and Environmental Science, Northeast Normal University, Changchun 130024, China

Received:2007-10-17 Revised:1900-01-01 Online:2008-06-20 Published:2008-06-20

摘要/Abstract

摘要： 在自然盐碱生境下,通过测定不同月份土壤和马蔺体内主要阳离子Na⁺、K⁺、Ca²⁺、Mg²⁺的含量,研究了主要阳离子的吸收、转运变化及其在马蔺体内的分布.结果表明: 不同月份马蔺体内阳离子含量变动很大.在6月以后,随着马蔺的生长, Na⁺、K⁺、Ca²⁺和Mg²⁺4种离子在植物体内累积量逐渐增加.其中,根中Ca²⁺、Na⁺含量峰值出现在7月,分别为2.30%和0.51%,K⁺、Mg²⁺的含量峰值分别出现在9、10月,分别为0.27%和0.28%;叶片中Na⁺含量在7月达到最大值(0.57%);K⁺、Ca²⁺和Mg²⁺在8月分别达到1.30%、2.69%和0.47%.与Na⁺相比, 7、8月时马蔺对K⁺的选择吸收能力较低,但转运能力较强.马蔺对所测离子有很强的富集能力,各种离子在植物体内的含量都明显高于土壤背景值,且不同部位对离子的利用和累积能力不同,马蔺对各阳离子的累积主要集中在地上30 cm到地下40 cm范围内.马蔺地上部分平均单株K⁺、Na⁺、Ca²⁺和Mg²⁺含量分别是地下部分的9.11、4.07、0.98和2.27倍.

关键词: 表层土壤水分, 尺度, 采样幅度, 采样密度, 空间变异

Abstract: The study on the monthly absorption, transportation, and distribution of Na⁺, K⁺, Ca²⁺and Mg²⁺ in Iris lactea under saline-alkali field conditions showed that the contents of test cations in I. lactea varied with months. After June, the cations contents in plant increased with growth. Root Ca²⁺ and Na⁺ contents were the highest in July, being 2.30% and 0.51%, respectively, while root K⁺ and Mg²⁺ contents were the highest in September (0.27%) and October (0.28%), respectively. Leaf Na⁺ content was the highest in July (0.57%), while leaf K⁺, Ca²⁺ and Mg²⁺ contents were the highest in August, being 1.30%, 2.69% and 0.47%, respectively. In July and August, the selective absorption (SA) of K⁺ was higher than that of Na⁺, while the selective transport (ST) was in adverse. The cations contents in I. lacteawere significantly higher than those in soil, suggesting that I. lactea had high accumulation capacity to these cations. The cations were mainly accumulated in the 0-30 cm aboveground part and 0-40 cm underground part ofI. lactea, and the average contents of Na⁺, K⁺, Ca²⁺and Mg²⁺ in aboveground part were 9.11, 4.07, 0.98 and 2.27 times of those in underground part, respectively.

Key words: surface soil moisture, scale, sampling amplitude, sampling density, spatial variability.

王咏^1,2;郭继勋¹;崔喜燕¹;韩德复¹. 马蔺体内主要阳离子含量月变化及分布[J]. 应用生态学报.

WANG Yong^1,2;GUO Ji-xun¹;CUI Xi-yan¹;HAN De-fu¹ . Monthly dynamics and distribution of major cations in Iris lactea. [J]. Chinese Journal of Applied Ecology.

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