Application of Sewage Sludge on Growth of Soybean Seedlings Grown in Aluminum Tozicity Soil
Crop production in red soil areas may be limited by aluminum (Al) toxicity. A possible alternative to ameliorate Al toxicity is the application of organic materials. In the present study, a pot experiment was conducted to investigate the effects of sewage sludge on soybean seedling grown in Al toxicity soil. It was found that application of sewage sludge increased soil pH and decreased soil monomeric Al concentrations. The height and fresh weight of 35-day-old soybean seedling increased gradually with sewage sludge ratio in mixed soils increased from 0% to 10%. At the same time, chlorophyll (Chl) content and activities of catalase (CAT) and peroxides (POD) increased, or contents of malondialdehyde (MDA) and membrane permeability (MP) decreased accordingly. However, at a higher sewage sludge ratio, 20%, those index mentioned above were opposite partly due to the high contents of soluble salts and NH4-N in sewage sludge. It is suggested that plants with higher activities of POD and CAT, more content of Chl, and lower contents of MDA and MP at 10% sewage sludge application consequently improved the plant growth under Al stress.
red soil aluminum tozicity sewage sludge soybean physiological response
LIU Qiang HE Genhe WANG Ning
College of Life Sciences,Jinggangshan University,Ji’an 343009,Jiangxi,China
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
2300-2323
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）