摘要
Based on soil monitoring data in nine sites of Jinhu, Xuyi and Hongze counties on the south bank of Hongze Lake from 1982 to 2013, changes in soil p H, total nitrogen（TN） content, available phosphorus content, organic matter（OM）content and cation exchange capacity（CEC） were analyzed. The results show that due to excessive application of chemical fertilizer in soil on the south bank of Hongze Lake, soil p H reduced by about 2 on average, while TN content and available phosphorus content in soil increased by more than one time and 2-5 times respectively. Soil acidification caused by agricultural production was very serious. In addition, low soil p H resulted in serious loss of soil cation, so that soil CEC in2013 accounted for less than 50% of that in 1982 and affected mineral nutrient metabolism of crops. Therefore, application of calcium, potassium and trace-element fertilizer should be paid more attention to during agricultural production in future.
利用洪泽湖南岸的金湖、盱眙和洪泽3县的9个土壤监测点近30年土壤相关监测数据,分析土壤pH值、土壤全氮含量、有效磷含量、有机质含量及阳离子交换量等指标变化。结果表明,由于过量化肥的施用,30年来洪泽湖南岸地区土壤pH值普遍下降2左右,土壤中全氮含量增加了1倍以上,有效磷含量增加了2~5倍,农业生产导致的土壤酸化问题十分明显。低pH值导致该地区土壤阳离子流失严重,其阳离子交换量不足原来的50%,已对作物的矿质营养代谢带来危害,应在本地区重视钙肥、钾肥及其他微量元素肥料的投入使用。
基金
Supported by the Surface Project of Natural Science Research for Higher Education in Jiangsu Province(13KJB210001)
Innovation Planning Project for University Students in Jiangsu Province(201310323040Y)
Key Technology R&D Program of Huai'an City,Jiangsu Province(SN13049)~~
