中条山中段森林土壤养分状况研究

Study on Forest Soil Nutrient in the Middle Part of Zhongtiao Mountain

在山西中条山中段,选择16个典型林分类型的48个样地,对土壤pH值、有机质以及氮、磷、钾营养元素的变异程度以及有机质与养分的关系进行了研究。结果表明：土壤pH值、土壤有机质以及氮磷钾含量指标的变异程度为中度。在垂直方向上,表层0-10cm土壤有机质、全氮、无机氮、有效磷和速效钾平均含量,均显著地高于其它10-30cm和30-60cm两个土层。在不同植被类型中,辽东栎林土壤有机质和全氮含量最高,其次为针阔混交林,而人工油松林的含量低。土壤无机氮在全氮中的比例为0.33%-4.68%。土壤有机质与土壤全氮含量的变化密切相关,但与无机氮的关系并不密切。在土壤表层中,土壤有机质显著制约土壤有效磷与速效钾含量的消长。

By establishing 48 forest soil plots involved 16 forest stands, the variation of soil pH, the contents of soil organic matter, soil nitrogen, phosphorus, and potassium, the relationship between soil organic matter and nutrients were studied in the middle of Zhongtiao mountain, Shanxi province. The results showed that variation coefficient of pH value,soil organic matter, soil nitrogen, phosphorus and potassium was belong to middle level. In the soil vertical horizons, the content of soil organic matter, total nitrogen, inorganic nitrogen, total phosphorus, available phosphorus and potassium in 0--10 cm horizon was obviously higher than the both of 10--30 cm and 30--60 cm horizons. No obvious difference was found for the total potassium content among the different horizons. Among the different forest types, the content of soil organic matter and total nitrogen under Quercus zeutaishansea forest were the highest, then followed by the secondary conifer and broadleal mixed forest, and was the lowest under Pinus tabulae.formis plantation. The ratio of inorganic nhrogen to total nitrogen ranged from 0.33% to 4.68%. Although soil organic matter was significantly related to soil total nitrogen, while the relationship to inorganic nitrogen was weak. In 0-10 cm horizon, soil organic matter can strongly influenee the changes of available phosphorous and potassium.