鄂东南县域农田耕层土壤养分状况及其变化

根据土壤普查资料和实际采样测定结果,探讨了鄂州市农田土壤耕层养分含量的变化特征。结果表明,有机质、有效P含量丰富,全N、有效K含量较缺乏;在1959年、1981年和2003年3个时段内,土壤有机质、全氮、有效磷和有效钾含量呈显著或较显著增长态势;土壤微量元素中,土壤Mn、Cu、Zn含量丰富,土壤B含量缺乏;从1981年和2003年,土壤Mn含量呈显著增长,土壤Cu含量略有增加,土壤Zn含量基本不变,土壤B含量略有降低。

Topsoil''''s Nutrient Situation and Changes of Farmland in Ezhou City,hubei Province

According to data of soil census,analysis of soil samples,it was studied for change of soil nutrient in Ezhou city HuBei Province.The results indicates that the mean value of Soil organic matter content,total N,available P and available K are 28.8g/kg,1.7g/kg,13.9 mg/kg and 118 mg/kg,respectively.From 1959 to 2003,the organic matter has increased 17g/kg,total N has increased 1.13 g/kg,available K has increased 76 mg/kg,available P has increased 8.8 mg/kg.Compared with the results from 1981,there was a sharply rise for soil available Mn,a little rise for available Cu,no changed for available Zn,butavailable B a little reduced for available B in average.