【摘要】 1998年对黑土区 (弓棚镇 )的耕层土壤养分进行分析 ,并与 1990年该区土壤的化验结果进行了比较。结果表明 :全区土壤速效氮、速效磷含量有所增加 ,以速效磷增加尤为突出 ,速效钾降低严重。与其它黑土区的土壤养分变化状况基本一致 ,并系统分析了土壤养分降低的原因 ,提出了合理的施肥措施更多还原

【Abstract】 Soil samples of cultivated horizon from Gongpeng town were analyzed in 1998 and the results were compared with that in 1990. The comparison showed that the content of available N, P increased and the increase of available P was more evident. The content of available K significantly decreased. The reason of the change was analyzed and fertilizer application was recommended.更多还原