设施菜地土壤pH值与磷素变化特征研究

摘要

To understand the soil quality and the utilization situation of phosphor fertilizer in protected vegetable plot,the protected vegetable plots in suburb of Wuhan City were selected to analyze the changing law of soil pH and P in different years of protected vegetable plots or in soil vertical section and the correlation between indexes.The results showed that soil pH in protected vegetable plot was from 6.79 to 7.13,which was 0.12-0.46 lower than soil pH in open vegetable plot; in comparison with open vegetable plot,the contents of total P and available P in protected vegetable plot accumulated more obviously,and it increased with age growing; soil pH increased firstly and then became steady when soil layer went deeper at 0-100 cm of soil vertical section; there was a positive correlation between content of available P and content of total P (R2 =0.5197,n =24),so,applying phosphor fertilizer can increase content of available P in soil of present protected vegetable plot.%为探究设施菜地土壤质量和磷肥利用情况,选取武汉市郊设施菜地为研究对象,分析了土壤pH值和磷素在不同年限设施菜地和土壤垂直剖面上的变化规律以及指标间相关性.结果表明:设施菜地土壤pH值在6.79～7.13之间,比露天菜地低0.12～0.46;总磷和速效磷含量相比露天菜地累积明显且随年限增长而上升;土壤pH值在0～100 cm垂直剖面上随深度增加先上升后稳定;速效磷与总磷含量具有显著的正相关性(R2=0.519 7,n=24),说明施磷肥仍可以提高当前设施菜地土壤中有效磷的含量.