西辽河冲积平原草甸土农田土壤肥力变化与施肥研究

The Fact-Finding Study on Fertility Changes and Spread Manure of Cultivated Soil in Xiliaohe River Alluvial Plain Grass Marshland

在第二次土壤普查后,抽选西辽河冲积平原草甸土进行农田调查,结果证实,垦植后由于管理粗放,不重视施农家肥,农田土壤肥力明显下降。又过分强调提高单产,大量的施用尿素和磷酸二铵,忽视钾肥投入,造成耕层土壤钾素大量耗失,N、P2O5、K2O三元素比例失衡。因此,建议在今后的施肥中应采用平衡施肥技术,重施农家肥,补施钾肥,推广生物菌肥,适量施用微肥,促进该地区农牧业可持续发展。

After second general survey of soil,possessing the farmland of grass marshland investigation of representativeness to the Xiliaohe River alluvial plain,the result is confirmed,and after cultivating to plant,extensive owing to manage,not attaching importance to the farm manure＇s inputing,soil fertility descends clearly.And overemphasizes raise the output per mu,input to large numbers of urea and two ammoniums phosphoric acid,ignorance the potassium,make the large number of soil potassium lost,N、P2O5、K2O this three element＇s proportions lost the balance.Therefore we should use the balance technology spread manure from now,attach importance to the farm manure,and mend to bring into effect potash fertilizer,the appropriate ammount is used trace elements,popularize living things bacterical manure,and promotes the agriculture and animal husbandry＇s development of this district.