Effect of Nitrogen Fertigation on Acidification of Latosolic Red Soil
Different nitrogen fertilizers (ammonium sulfate, ammonium nitrate and urea) were applied to latosolic red soil in a pot experiment to investigate soil acidification processes under drip irrigation system. In the experiment 6 treatments were arranged with 4 replicates, and the soil acidification was compared between the treatment with maize planting and that without. The pH values of the soil at various layers were found to decrease and the exchangeable aluminum to increase after ammonium sulfate, ammonium nitrate and urea were fertigated. The pH values of different soil layers below drippers were higher but the content of exchangeable aluminum lower in the maize planting treatment than those in the non-maize planting treatment. This suggests that planting maize could reduce acidification and content of exchangeable aluminum of latosolic red soil resulted from nitrogen fertigation.
国家科技期刊平台
NSTL
万方数据
维普
