辽宁省玉米主产区土壤养分状况调查分析

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。

Investigation of Soil Nutrient Status in Main Maize Planted Regions of Liaoning Province

Soil samples in main maize planted regions of Liaoning Province were sampled using grid method, and the soil organic matter, pH and available nutrient contents were analyzed. The results showed that soil pH was neutral, soil OM content was medium, the contents of available P,K and Zn in 65% maize plnated soil and NH4-N content in 99% maize planted soil were deficient. pH variation was small, available P variation was large, variation trend was available P> available Zn>OM> NH4+-N> available K> pH. Tthe variation of the contents of soil OM, pH and available nutrient was large between various soil types and various ecology regions.