%0 Journal Article
%T Monthly dynamics and distribution of major cations in Iris lactea.<br>马蔺体内主要阳离子含量月变化及分布
%A WANG Yong
%A GUO Ji-xun
%A CUI Xi-yan
%A HAN De-fu
%A <br>王咏
%A 郭继勋
%A 崔喜燕
%A 韩德复
%J 应用生态学报
%D 2008
%I 
%X 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.
%K 马蔺
%K 阳离子累积
%K 盐碱化土壤
%K 马蔺
%K 离子含量
%K 月变化
%K 分布
%K Iris
%K major
%K cations
%K distribution
%K dynamics
%K 地下部分
%K 单株
%K 地上部分
%K 范围
%K 阳离子
%K 累积能力
%K 利用
%K 同部位
%K 土壤背景值
%K 富集能力
%K 转运能力
%K 吸收能力
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=B7F9174DD0C8B5B0DD8AF0E566951480&yid=67289AFF6305E306&vid=2A8D03AD8076A2E3&iid=B31275AF3241DB2D&sid=7C786AA9670CF26C&eid=323ACE6C9CE37BAB&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=0&reference_num=29