Interaction of Pb and Cd in Soil Water Plant System and Its Mechanism: II. Pb Cd Interaction in Rhizosphere *1English Full Text

CHEN HUAIMAN, LIN QI and ZHENG CHUNRONG Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 (China) (Received April 22, 1998; revised May 26, 1998)

Abstract: The interaction of Pb Cd can be observed not only in the uptake process of elements by plants and in their influence on the growth, but also in rhizosphere. The changes in extractable Cd and Pb concentrations in the rhizosphere soil of rice plants, root exudates from wheat and wheat plant and their complexing capacity with Pb and Cd were investigated under different Pb and Cd treatments. Results showed that the concentration of extractable Cd in the rhizosphere of rice in red soil was markedly increased by Pb Cd interaction. It increased by 56% in the treatment with Pb and Cd added against that in the treatment with only Cd added in soil. The considerable differences in both composition and amount of root exudate from wheat and rice were found among different treatments. Pb and Cd might be complexed by root exudates. The concentrations of free Pb and Cd in the solution were increased markedly by adding root exudate from wheat and decreased by that from rice due to Pb Cd interaction. The distribution patterns of Pb and Cd in roots were affected by Pb Cd interaction, which accelerated transport of Pb into internal tissue and retarded accumulation of Cd in external tissue.

Keywords：

Cd; interaction; Pb; red soil; rhizosphere of rice and wheat;

Series：
(D) Agriculture; (A) Mathematics/ Physics/ Mechanics/ Astronomy
Subject：
Physical Geography and Topography; Fundamental Science of Agriculture; Agronomy
Classification Code：
S155.25,S154.4

Mobile Reading

Read on your phone instantly

Step 1
Scan QR Codes

"Mobile CNKI-CNKI Express" App

Step 2
Open“CNKI Express”

and click the scan icon in the upper left corner of the homepage.

Step 3
Scan QR Codes

Read this article on your phone.
CAJ Download
PDF Download

Interaction of Pb and Cd in Soil Water Plant System and Its Mechanism: II. Pb Cd Interaction in Rhizosphere *1English Full Text

CHEN HUAIMAN, LIN QI and ZHENG CHUNRONG Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 (China) (Received April 22, 1998; revised May 26, 1998)

Read on your phone instantly

Citation Network

Related Literature