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通过 1 984～ 1 998年河南开封不同土壤耕层有机质与氮磷钾养分分析 ,论述了不同农业利用方式和农田管理措施下不同土壤耕层养分的时空变化特征和硝态氮累积特性 .由于“重氮磷 ,轻有机肥 ,忽视钾素补给” ,土壤养分变化的总趋势以下降 ,钾素耗竭性明显 .土壤养分空间变化较为复杂 ,但不同土壤间耕层养分为普通淡色潮湿雏形土 >底锈干润雏形土 >石灰淡色潮湿雏形土 >灌淤旱耕人为土 >简育干润雏形土 >干润砂质新成土 .硝态氮累积表现为由上至下递减或由上至下递增和相对积累于土体某一深度 .最后研究提出了土壤持续利用的有效技术途径 .
Based on the analysis of the nutrients, nitrogen, phosphorus, and potassium contents in different soil layers and the relationship between the nutrients and the accumulation of nitrate nitrogen in different soil layers under different agricultural practices and farmland management measures from 1998 to 1998, Diazo phosphorus, light organic fertilizer and neglecting the supply of potassium, "the general trend of soil nutrient changes decreased and the potassium depletion was obvious. The spatial variation of soil nutrients was rather complicated, but the nutrients in different soil layers were normal pale-color moist embryonic soil> At the end of the experiment, the dry rust-forming soil> lime-light wet embryonic soil> irrigated silt-dry man-made soil> And relatively accumulated in a certain depth of soil.Finally, the study put forward an effective technical approach to the sustainable use of soil.