2017年潢川县耕地土壤养分状况调查

Nutrient Status Investigation of Farmland in Huangchuan County in 2017

通过对2017年110个耕地土壤样品进行检测分析,结果显示,潢川县耕地土壤有机质含量处于中等偏下水平,全氮含量中等偏上,速效磷含量处于较低水平,速效钾含量在中等水平;耕地土壤p H降低速度较快;水稻土有机质含量高于黄棕壤,黄棕壤高于潮土;水稻土全氮含量高于黄棕壤,黄棕壤高于潮土;南部低山丘陵区土壤有机质含量高于中部垄岗区,中部垄岗区有机质含量高于北部低丘沿河平原区; 3个不同粮食主产区土壤全氮含量基本相当。与第二次土壤普查相比,有机质、全氮、速效钾含量有明显上升趋势,速效磷含量下降明显;与2005—2008年相比,有机质、全氮、速效钾含量有所增加,速效钾含量明显上升;速效磷含量明显下降;与2005—2008年土壤微量元素相比,速效铁、速效锌、速效硼、速效硫含量有明显上升趋势,速效锰含量有降低趋势,速效铜持平。

Through the analysis of 110 soil samples of arable soil in 2017,the results showed that the content of soil organic matter in Huangchuan County arable soil was lower than that in middle level,the content of total nitrogen was above average,the available phosphorus content was at low level and the content of available potassium was moderate;the pH value of arable soil decreased rapidly;the content of organic matter in paddy soil was higher than that in yellow brown soil,the yellow brown soil was higher than the tidal soil;and the total nitrogen content of paddy soils was higher than that in yellow brown soil,yellow brown soil was higher than the tidal soil.The organic matter content in the southern low mountain hilly area was higher than that in the middle ridge hillock area and the middle ridge hillock area was higher than that in the northern low mountain hilly area;the total nitrogen content of soil in three main grain producing areas was basically the same.Compared with the second soil census,the content of organic matter,total nitrogen and available potassium increased,and the available potassium increased obviously;contrary,the effective phosphorus content declined obviously;compared with the data of 2005-2008,the content of organic matter,total nitrogen,available potassium had increased,the availability of potassium increased significantly,and the effective phosphorus content decreased obviously,and compared with 2005-2008 soil trace element data,effective iron,effective zinc,effective boron,effective sulfur content had an upward trend,the effective manganese content had the tendency to reduce,the effective copper was flat.