Phytoextraction of salts by Atriplex nummularia lindl. under water stress in saline sodic soils

被引：17
作者：
de Souza, Edivan R. [1 ]
Freire, Maria B. G. dos S. [1 ]
do Nascimento, Clistenes W. A. [1 ]
Montenegro, Abelardo A. de A. [2 ]
Freire, Fernando J. [1 ]
de Melo, Hidelblandi F. [3 ]
机构：
[1] DEPA UFRPE, BR-52171900 Recife, PE, Brazil
[2] DTR UFRPE, Recife, PE, Brazil
[3] Univ Fed Rural Pernambuco, Recife, PE, Brazil
来源：
REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL | 2011年 / 15卷 / 05期
关键词：
phytoremediation; halophytes; salt affected soils; PHYTOREMEDIATION; TOLERANCE;
D O I：
10.1590/S1415-43662011000500007
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This study aims to evaluate the growth, production and extraction of salts by Atriplex grown on saline-sodic soil under water stress conditions and to compare soil properties before and after their cultivation. The experiment was carried out in a greenhouse during 134 days growing Atriplex nummularia in pots with 20 kg of saline sodic soil with four levels of soil moisture (35, 55, 75 and 95% of field capacity) with a control (soil without plant). The experiment was performed in a randomized block with eight replications. The high concentrations of Ca2+, Mg2+, K+, and especially Na+ and Cl-in leaves of Atriplex nummularia, associated with high dry matter production characterizes this species as phytoextraction of salts, extracting through leaf and stem: 644, 758, 1059 and 1182 kg ha(-1) at 35, 55, 75 e 95% of field capacity, respectively. The variables of the exchangeable cations (Ca2+, Mg2+, K+, sum of bases) and total organic carbon remained stable between the beginning and end of the experiment in all treatments, while Na+ and exchangeable sodium percentage decreased after cultivation of the plant. The Atriplex responded to soil moisture with respect to biomass production and salts extraction.
引用
收藏
页码：477 / 483
页数：7
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