【摘要】 对德州市1982~1998年的土壤肥力调查结果表明,土壤有机质由6.5 g/kg提高到11.1 g/kg,全氮由0.58 g/kg上升至0.69 g/kg,二者均呈现缓慢增长趋势,但含量仍然偏低。土壤碱解氮1988年比1982年降低6.20 mg/kg,1998年比1988年略有回升。速效磷增幅较大,由5.10 mg/kg增加到14.93 mg/kg,土壤速效钾下降明显,由186.01 mg/kg减少到98.70 mg/kg。部分地块微量元素的缺乏呈上升趋势。在培肥地力上应进一步增加有机肥施用量和秸秆还田量,化肥在施用上要实行适氮、稳磷、补钾和微量元素的配合施用。大棚土壤过量施肥现象也比较普遍,要注意根据各种蔬菜的需要量实行测土施肥,达到以合理的投入获得较好的产出效果。更多还原

【Abstract】 The soil fertility of Dezhou City during 1982~1998 was analyzed.The results showed that the organic matter increased from 6.5 g/kg to 11.1 g/kg and the total nitrogen increased from 0.58 g/kg to 0.69 g/kg.Both of them showed slow-increasing trend,but their content were still lower.The soil available nitrogen in 1988 was lower than that in 1982,but it showed a slight upturn in 1998.The available phosphorus increased greatly from 5.1 mg/kg to 14.93 mg/kg.The soil available potassium obviously decreased from 186.01 mg/kg to 98.70mg/kg.The lack of microelements in some fields showed rising trend.So in order to improve the soil fertility,the application of organic fertilizer and straw returning should be increased and the application of chemical fertilizer should be carried out according to the principle of applying proper N,maintaining P,increasing K and adding microelements.Soil testing and formulated fertilization for vegetables in greenhouse should be adopted for more output but little input.更多还原