摘要： 为研究安国市药田和粮田土壤中有效氮含量累积及分布特征,分析了河北省安国市药田和粮田不同土壤深度中有效氮的含量。结果表明,药田和粮田土壤中有效氮含量在各地块间差异较大;药田和粮田土壤中有效氮含量随土层深度的增加而减低,差异极显著(P<0.01);药田0~20,20~40,40~60 cm土壤中有效氮含量分别为39.42,24.02,16.07 mg/kg,粮田0~20,20~40,40~60 cm土壤中有效氮含量分别为37.37,22.88,13.20 mg/kg,粮田土壤中有效氮含量略低于药田土壤。按照第2次全国土壤普查确定的土壤肥力分级标准可知,药田和粮田中有效氮含量处于五级或六级水平,肥力很低。由此说明,药田和粮田土壤的供氮水平相当,但土壤氮素肥力较低,生产中应多采取有机肥与无机肥配施提高地力。

关键词: 安国市, 有效氮, 药田, 粮田, 土壤深度, 供氮水平

Abstract: The distribution characteristic of alkali-hydrolysable nitrogen was studied by analysis of alkali-hydrolysable nitrogen content in different soil depth of herbal fields and food-crop fields in Anguo city,Hebei province.The results indicated that difference of alkali-hydro nitrogen content in the lands between blocks of herbal fields and food-crop fields was magnitudes,and alkali-hydro nitrogen content was reduced with the increase of soil depth,extremely significant difference (P<0.01).Alkali-hydro nitrogen content of 0-20,20-40,and 40-60 cm in herbal fields and food-crop fields were 39.42,24.02,and 16.07 mg/kg and 37.37,22.88,and 13.20 mg/kg,respectively.Alkali-hydro nitrogen content of food-crop fields was slightly lower than herbal field soils.Alkali-hydrolysable nitrogen content of herbal fields and food-crop fields were in fifth or sixth level according to the soil fertility classification standards of the second national soil survey,and the fertility of soils were low.Therefore,soil nitrogen supplying capacity of herbal fields and food-crop fields were similar,but the soil fertility was low,so more measures should be taken to improved soil fertility,as application of organic and nitrogen fertilizer.

Key words: Anguo city, Available nitrogen, Herbal field, Food-crop field, Soil depth, N-supply level

中图分类号: 

• S143.1