湖南农业大学学报（自然科学版）2012，Vol.38Issue(4)：430-434,5.DOI:10.3724/SP.J.1238.2012.00430
不同改良剂对镉污染土壤的改良效果和对水稻光合特性的影响
Effects of different soil amendments on the remediation of Cd-contaminated soil and the photosynthetic characteristics of rice plant
摘要
Abstract
A pot experiment was conducted to study the effects of three amendments(red mud, lime and sepiolite)on remediation of Cd in Cd-contaminated paddy soil and photosynthetic characteristics of rice plant. The results indicated that application of red mud, lime and sepiolite could effectively promote the stabilization of soil exchangeable Cd and the immobilization of Cd with the red mud shown the best immobilization effect. Compared with the control, the application of red mud increased yield dramatically, by 11.41%, and the application of sepiolite slightly increased the yield, while the application of iime decreased the yield slightly. The application of soil amendments could improve chlorophyll content (SPAD value), the rice stomatal conductance(Gs), the net photosynthetic rate(Pn), intercellular CO2 concentration(Ci)and transpiration rate(Tr)of flag leaf of rice. Among the three amendments, the effect of application of red mud was most obvious, with which the SPAD value, Gs, Pn, Ci and Tr was respectively increased by 6.63%, 8.59%, 6.93%, 11.95% and 5.42%. Three amendments all increased the flag leaf area, but the degree of increase varied. Compared with lime and sepiolite, red mud application could better alleviate the effect of Cd on rice growth.关键词
水稻/赤泥/石灰/海泡石/镉污染土壤/光合特性Key words
rice/ red mud/ lime/ sepiolite/ Cd-contaminated paddy soil/ photosynthetic characteristics分类
农业科技引用本文复制引用
范美蓉,罗琳,廖育林,魏建宏,孙玉桃,汤海涛..不同改良剂对镉污染土壤的改良效果和对水稻光合特性的影响[J].湖南农业大学学报（自然科学版）,2012,38(4):430-434,5.基金项目
国家自然科学基金项目(50874046) （50874046）
国家"863"计划重点项目(2010AA065203) （2010AA065203）
湖南省教育厅项目(08A032) （08A032）
