【摘要】 2000年海淀区耕地土壤养分分析结果表明,全区整体处于中等水平以上。其中,有机质含量为17.1g/kg,有效磷和有效钾含量分别为78.9mg/kg和144.5mg/kg。不同耕地利用类型土壤养分含量差异明显,菜地高于果园,果园高于粮田。与1980年海淀区全国第2次土壤普查结果相比,土壤养分普遍提高。更多还原

【Abstract】 Nutrients of arable soil in Haidian District was analyzed in 2000. Results shoned that soil nutrients content in Haidian was at middle level in general. The mean value of Soil organic matter, Olsen-P and available K were 17.1g/kg, 78.9mg/kg and 144.5mg/kg, respectively. A remarkable difference for soil nutrients content existed among three land use types, which were vegetable field, orchard field and cereal field in sequence. Compared to the results at 1980, the nutrients content in arable soil increased in general.更多还原