【摘要】 在立地条件相对一致的情况下,应用时空互代的方法,探讨了土壤养分的时空变异性特征和动态演化规律。结果表明:土壤养分总体较为丰富,且土壤熟化程度高,但速效N和速效P俱缺。土壤养分含量变异系数较大,为4.0%~61.5%,土壤养分受外界因素影响的空间变异性较为显著,反映了该区土壤性状不均一性。除全P外,其余土壤养分各指标(有机质、全N、全K、速效N、速效P、速效K)天然林都大于人工林。日本落叶松人工林土壤有机质、全N、全P、全K、速效N、速效P、速效K含量在定植后的4~8 a间均呈下降趋势,而在8~26 a间全P、全K、速效N、速效K含量均呈上升趋势,速效P含量呈下降趋势,但总体上地力有所恢复。更多还原

【Abstract】 The results showed the soil nutrient was rich in general,and the soil ripening degree was high,but quick-acting N and P lacked.The soil nutrient content variation coefficient was relatively big,4.0%~61.5%,the soil nutrient was affected by the outside factors,the special variation was relatively significant,which reflected the property that the soil characteristics were different in the area.Except the total N,other every nutrient indexes( organic substrate,total N and K,quick-acting N,P,and K ) of soil under the natural forest were bigger than those of soil under the plantation.更多还原