桂北地区桉树采伐迹地土壤养分含量研究

Study on the Soil Nutrient Content of Eucalyptus Trees in the North of Guibei Area

对桂林市灵川县桉树采伐情况及不同采伐时期对土壤内部结构的影响进行分析,总结其演变规律。结果表明,桉树采伐过后该地区每千克土壤内含有机物质10.1 g,含量偏低;土壤呈酸性,其pH为4.8;每千克土壤内有效磷、全氮和速效钾含量分别为1.4 mg、1.095 g和65 mg,其中有效磷含量极低,全氮和速效钾含量中等;土壤中的阳离子交换速度和数量均有所下降,表明此时的土壤保肥能力极低。

The effects of the harvesting of eucalyptus and the influence of different harvesting periods on the internal structure of the soil were analysed in Lingchuan County, Guilin City, and the evolution rules were summarized. The results showed that the content of organic matter was 10.1 g per kilogram of soil in the region after eucalyptus felling, and the content was low. The soil was acidic and its pH was 4.8. The content of available phosphorus, total nitrogen and available potassium in each kg of soil was 1.4 mg,1.095 g and 65 mg, respectively, in which the available phosphorus content is extremely low, the total nitrogen and available potassium content is moderate, and the cation exchange rate and quantity in the soil are all decreased, indicating that the soil fertility is extremely low at this time.