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以2010年80个定点田块监测结果为依据,对海安县近十年来耕地土壤肥力演变趋势及原因进行了分析。结果表明,海安县耕层土壤有机质、全氮、有效磷、速效钾含量等指标稳定提高;耕地施肥总量得到有效控制,施肥结构趋于合理,作物产量稳定提高。同时指出了农户实际施肥过程中存在的不足及对耕地土壤肥力的潜在影响,并依此提出了“稳氮控氮、平衡磷钾,增施优质农家肥和商品有机肥,推广秸秆还田”等耕地土壤培肥措施。
Based on the results of 80 field monitoring plots in 2010, the trend and reasons of cultivated land fertility evolution in Hai’an County in recent ten years were analyzed. The results showed that the contents of soil organic matter, total nitrogen, available phosphorus and available potassium in the topsoil of Haian County increased steadily. The total fertilization of cultivated land was effectively controlled, the fertilization structure tended to be reasonable and the yield of the crop was steadily increased. At the same time, pointed out the shortcomings of farmers in the actual fertilization process and the potential impact on soil fertility of cultivated land. Based on this, we put forward the principle of “stabilizing nitrogen and controlling nitrogen, balancing phosphorus and potassium, adding high quality manure and commercial organic fertilizer and promoting straw returning ”And other soil fertility cultivation measures.