Aluminum toxicity in a soil-plant system after paper mill sludge compost application

作者：Lin, Yunqin; Wang, Dehan^*; Shen, Yi

来源：Nordic Pulp & Paper Research Journal, 2010, 25(1): 124-128.

DOI：10.3183/npprj-2010-25-01-p124-128

• Paper mill sludge compost
• Red soil
• Pot experiment
• Aluminium pollution

Aluminium pollution in a soil-plant system treated with paper mill sludge compost (PMSC) in maize pot experiments was evaluated. The results showed that the active aluminum concentrations in soil with 3-10% PMSC dosage were 0.66-1.20 times higher than that of the control at the beginning, but decreased some 50 - 70% during the planting period and were some 20 - 50% lower than that of the original red soil at harvesting. As the main fraction of the active Al in our experiment, the monomeric Al concentrations of the PMSC treatments decreased some 50 70% throughout the experiment. Compared with the control, all maize that grew in the soil-PMSC mixture had less aluminum concentrations both in root and shoot (some 1.2 - 14% and 32 - 47% less than that of the control respectively) and obtained better growth status. Our data indicated that PMSC was well suited to be applied to the red soil to improve soil nutrients and no aluminium pollution was observed in the soil-plant system. The best PMSC application ratio was 6 percent.

• 出版日期2010
• 单位华南农业大学