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通过山东省临沂市兰山区5个土类1 490个土壤样品分析,研究了不同土壤类型中表层土壤pH值、有机质、全氮、速效磷以及速效钾含量的差异。结果表明:1)棕壤pH众数低于7,其他土壤类型的pH众数都在7左右;2)兰山区有机质含量低的耕地主要集中在棕壤,是土壤培肥的重点;3)棕壤碱解氮平均值78 mg/kg,且小于90 mg/kg的样本数占其总样本的53.61%。生产中应注意补充施用氮肥。
The soil pH value, organic matter, total nitrogen, available phosphorus and available potassium contents of different soil types were studied by analyzing 1 490 soil samples of 5 soil types in Lanshan District of Linyi City, Shandong Province. The results showed that: 1) the mode of pH of brown soil was less than 7, and that of other soil types was about 7; 2) the cultivated land with low organic matter content in Lanshan area was mainly concentrated in brown soil, Brown soil alkaline hydrolysis average nitrogen 78 mg / kg, and the number of samples less than 90 mg / kg accounted for 53.61% of the total sample. Production should pay attention to the application of nitrogen fertilizer.