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通过土壤耕层养分特征分析，论述了不同农田利用和管理措施下不同土壤类型的土壤养分时空变异特征及硝态氮的累积特性。由于“重氮磷，轻有机肥，忽视钾素补给”，土壤养分变化以退化趋势为主，钾素耗竭性明显。硝态氮累积表现为从上向下递减、由上至下递增和相对积累于土体某一深度3种变化趋势。提出了土壤持续利用途径。
Based on the analysis of nutrient characteristics of soil topsoil, the spatio-temporal variations of soil nutrients and the accumulation of nitrate-N under different soil types under different farmland utilization and management measures were discussed. Due to “diazo phosphorus, light organic fertilizer, neglecting the supply of potassium”, the changes in soil nutrients are mainly degenerated, and potassium depletion is obvious. The accumulation of nitrate nitrogen decreased from top to bottom, increasing from top to bottom and accumulating in three depths of soil. Put forward the sustainable use of soil.