豫北平原潮土不同质地养分现状·分析

[目的]对豫北平原潮土不同质地的主要养分现状及消长原因进行分析。[方法]抽取豫北平原国家测土配方施肥补贴项目2005～2012年部分潮土取土化验数据,共计5 256个,与1986年第二次土壤普查土样化验结果进行对比。[结果]潮土有机质平均含量为12.20～15.00 g/kg,全氮平均含量为0.70～1.00 g/kg,有效磷平均含量为13.77～14.17 mg/kg,速效钾平均含量为96～146 mg/kg。[结论]与第二次土壤普查相比,豫北平原潮土有机质、全氮、有效磷、微量元素均呈上升趋势,氮磷钾处于中等水平,铜铁锌锰处于盈余水平。

Nutrient Status and Texture Analysis of Calcareous Soil in North Henan Plain

[Objective] The research aimed to analyze the current situation of main nutrients and the reasons of growth and decline of different texture of calcareous soil in North Henan plain.[Method] A total of 5 256 date were extracted from soil test data in 2005-2012 of North Henan plain national soil testing fertilizer subsidy project.They were compared with the test results of soil samples of the second soil census in 1986.[Result] Soil organic matter content was 12.20-15.00 g/kg on average,the average total nitrogen content was 0.70-1.00 g/kg,the average effective phosphorus content of 13.77-14.17 mg/kg,and the rapidly-available potassium content in an average was 96-146 mg/kg.[Conclusion] Compared with the second soil census,the soil organic matter,total nitrogen,effective phosphorus,and trace elements of calcareous soil in north Henan plain were on the rise,and N,P and K were in the medium level,and copper,iron,zinc,and manganese was in surplus.