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采用网格取样法采集辽宁省玉米主产区耕层土壤进行有机质、pH和有效养分含量分析。结果表明:辽宁省主要玉米田土壤近中性,有机质含量中等,65%以上的土壤速效K、速效P和有效Zn含量低于临界水平,99%的土壤NH4+-N含量低于临界值;从变异情况看,土壤pH变异最小,速效P变异最大,总变异趋势为速效P>有效Zn>有机质>NH4+-N>速效K>pH;不同土壤类型和不同生态区的土壤有机质、pH和有效养分含量变异也较大。
Soil sampling was used to collect soil organic matter, pH and available nutrients in the main corn producing areas of Liaoning Province. The results showed that: the main maize field in Liaoning Province was near-neutral with medium organic matter content. Above 65% soil available K, available P and available Zn were below the critical level and 99% NH4 + -N content was below the critical value. From In the variation situation, the soil pH variation is the smallest, the variation of available P is the largest, and the total variation trend is available P> available Zn> organic matter> NH4 + -N> available K> pH. Soil organic matter, pH and available nutrients in different soil types and different ecological regions Content variation is also larger.