河南省土壤养分状况研究

利用测土配方施肥数据,对全省95个县40多万个土壤样品分析表明:全省土壤有机质、全氮含量平均为15.98和0.96 g/kg,土壤速效磷、速效钾、缓效钾平均分别为17.37,121.91,676.41 mg/kg,土壤有效铁、有效锰、有效铜、有效锌、水溶性硼平均含量分别为11.23,16.47,1.49,1.38,0.64 mg/kg.与第2次土壤普查相比,全省有机质、全氮、速效磷、有效铜、有效锌、水溶性硼含量分别增加30.98%,20%,194.36%,22.89%,107.74%,65.13%;土壤速效钾、有效锰、有效铁含量分别减少8.13%,3.37%,29.37%.从养分分级来看,全省有机质、全氮、速效磷、速效钾、有效硼、有效锌、有效铁、有效锰含量较低的样本占测试样本的比例分别为9.77%,2.98%,30.87%,40.18%,43.32%,11.56%,12.46%,6.24%.

Soil Nutrients Status in Henan Province

Soil organic matter,total nitrogen,slowly available potassium and available P,K,Fe,Mn,Cu,Zn,B were analyzed using the data of national soil testing and formulated fertilization program from 95 counties in Henan Province during 2005—2009.The results showed that the average organic matter,total nitrogen,slowly available potassium,available P,K,Zn,B,Mn,Fe,Cu of soil in Henan were15.98 g/kg,0.96 g/kg,676.41 mg/kg,17.37 mg/kg,121.91 mg/kg,11.23 mg/kg,16.47 mg/kg,1.49 mg/kg,1.38 mg/kg,0.64 mg/kg,respectively.Compared to the results of national second general soil survey,the soil organic matter,total nitrogen and available P,Cu,Zn,B increased by 30.98%,20%,194.36%,22.89%,107.74%,65.13%,respectively;soil available K,Mn,Fe decreased by 8.13%,3.37%,29.37%.According to the classification criterion of soil nutrient,low concentration of soil organic matter,total nitrogen and available P,K,B,Zn,Fe,Mn accounted for 9.77%,2.98%,30.87%,40.18%,43.32%,11.56%,12.46%,6.24%.