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分析了已实施测土配方施肥技术8年的安徽省芜湖县耕地土壤pH值、养分状况及变化特征。结果表明:该县耕地土壤pH值属弱变异性,且显示趋中性变化。土壤有机质、全氮、有效磷、速效钾均属中等变异。较2005年,土壤各养分含量及等级变化各异。全县土壤有机质含量呈递增趋势,等级Ⅰ所占比例增加,III级所占比例有所下降;土壤全氮含量呈递减趋势,等级Ⅲ级所占比例显著增加,而Ⅳ、Ⅴ、Ⅵ级土壤也得到了有效的改良;土壤有效磷、速效钾含量呈递增趋势,等级也发生了变化,均是Ⅲ级土壤比例显著增加,Ⅴ和Ⅵ级土壤所占比例明显下降。研究旨在为土壤养分科学管理和平衡施肥提供科学依据,为测土配方施肥技术的进一步完善和深入推广提供参考。
The soil pH value, nutrient status and variation characteristics of cultivated land in Wuhu County, Anhui Province, which have been tested by soil testing and fertilization for eight years, were analyzed. The results showed that the soil pH of the arable land in this county is a weak variability, and shows a trend of neutrality. Soil organic matter, total nitrogen, available phosphorus, available potassium are medium variations. Compared with 2005, soil nutrient content and grade vary. The content of soil organic matter in the whole county increased gradually, the proportion of grade Ⅰ increased and the proportion of grade Ⅲ decreased. The total nitrogen content of soil showed a decreasing trend, and the proportion of grade Ⅲ increased significantly. However, the content of soil of Ⅳ, Ⅴ and Ⅵ But also the effective improvement. The content of available phosphorus and available potassium in soil showed an increasing trend and the rank also changed. The content of grade Ⅲ soil increased significantly while that of grade Ⅴ and Ⅵ decreased obviously. The purpose of this study is to provide a scientific basis for scientific management of soil nutrients and balanced fertilization and provide reference for the further perfection and in-depth promotion of soil testing and fertilizer technologies.