Causes and Management of Subsoil Acidification Under Legume-Based Farming Systems: an Australian Story
Subsoil acidification appears to be mainly caused by spatial separation of acid and alkali produced in the nitrogen and carbon cycles. Acid production by plant roots due to excess cation uptake plays a major role in the development of subsoil acidity. The decomposition of shoot residues does not cause subsoil acidification but changes topsoil pH. Nitrification of NH4 from fertilizers or plant residue N and subsequent leaching of nitrate contribute to topsoil acidification. Options of managing subsoil acidity are discussed with an emphasis on biological amelioration through managing plant cation-anion uptake.
Caixian Tang
Department of Agricultural Sciences, La Trobe University, Bundoora (Melbourne) , Vic 3086, Australia
国际会议
The 7th International Symposium on Plant-Soil Interactions at Low pH(第七届低pH条件下植物-土壤交互作用国际研讨会)
广州
英文
85-87
2009-05-17（万方平台首次上网日期，不代表论文的发表时间）