四川土壤养分及酸碱性变化趋势分析

Analysis of the variation of soil nutrient contents and soil pH in Sichuan province

根据具有较长时间跨度的土壤剖面监测和最新年度土壤监测数据分析表明,在现有施肥和管理水平下,土壤养分及酸碱度总的变化趋势为:土壤有机质、全氮、全磷、全钾含量以上升和稳定为主;碱解氮、有效磷含量稳中有升,速效钾含量升降各半;有效铜、锌、铁、锰含量有上升趋势,有效硼有下降趋势而有效钼有升有降;中性和微酸性土壤pH值普遍降低,土壤酸化明显。

According to the data of long-term soil profile measure and soil monitoring in the last years,the dynamic tendency of soil nutrients in the fixed location was discussed.The result showed that the contents of soil organic matter,total N,P,K were stable and increased slightly,under ordinary fertilization and management level.Available N and P were increased slowly,while available K was increased or decreased in different fields.The available Cu,Zn,Fe,Mn content of soil showed increasing trend,and available B ...