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通过 1998年秋后对辽宁省铁岭市七个县 (市 )区 55万 hm2 耕地的 74 7个土样化验分析 ,结果表明 :土壤有机质含量平均为 1.58% ,仍然是较缺和中等状况 ,但较缺面积有所增加。全氮含量平均为 0 .0 89% ,略有下降 ,也处于中等和较缺状况 ,同样 ,较缺面积增大。有效磷含量平均为 13.8mg/kg,明显增加 ,已处于中等和较缺状况 ,并且有一定面积达到较丰富状况。速效钾含量平均为 114 mg/kg,明显下降 ,大面积处于中等和较缺状况 ,而且较缺面积大幅度增加
Through the analysis of 747 soil samples of 550000 hm2 of cultivated land in seven counties (cities) of Tieling City of Liaoning Province after autumn 1998, the results showed that the average content of soil organic matter was 1.58% The lack of area has increased. The average total nitrogen content of 0.089%, a slight decline, but also in the medium and the lack of conditions, the same, the lack of area increased. Available phosphorus content average 13.8mg / kg, significantly increased, has been in the medium and the lack of conditions, and a certain area to achieve more abundant conditions. The available potassium content was 114 mg / kg on average, significantly decreased, with large area under medium and deficient conditions, and the deficient area increased significantly