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基于空间插值的连州市森林土壤氮素含量分析
张志辉1, 程长福1, 康　剑2, 丁晓纲3
1.清远市龙坪林场;2.中国科学院华南植物园;3.广东省森林培育与保护利用重点实验室 / 广东省林业科学研究院
摘要:
森林土壤氮素是衡量林地土壤营养的重要指标。研究通过全面采集连州市森林土壤分层样本 并测定氮素含量，基于空间分析的方法，分析土壤氮素含量的空间格局。结果表明：连州市森林土壤氮 素 I-F-1 层 1 033.36.05±361.41 mg/kg，I-F-2 层为 957.53±324.29 mg/kg，I-F-3 为 918.92±297.24 mg/kg。 土壤氮素含量随土层的加厚降低，表层土与其他土层间有显著差异。在空间分布上，连州市东南部氮素 含量较高，中南部较低，这可能是由于土地利用方式的差异导致的。研究结果揭示了连州市森林土壤氮 素含量的空间分布格局。
关键词:  森林土壤  氮素  空间格局  土层
DOI：
分类号:
基金项目:广东省林业科技计划项目（2021-KYXM-13），广东省省级财政专项资金“林地土壤调查”
Analysis of Nitrogen Content in Forest Soil in Lianzhou City Based on Spatial Interpolation
zhangzhihui1, chengchangfu1, KANG Jian2, DING Xiaogang3
1.qingyuanshilongpinglinchang;2.South China Botanical Garden, Chinese Academy of Sciences;3.Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/ Guangdong Academy of Forestry
Abstract:
Forest soil nitrogen is an important index to measure forest soil nutrition. In this study, strati?ed forest soil samples were collected in Lianzhou city and nitrogen content was measured. Based on the method of spatial analysis, the spatial pattern of soil nitrogen content was analyzed. The results showed that forest soil nitrogen in Lianzhou city was 1 033.36.05±361.41 mg/kg in the I-F-1 layer, 957.53±324.29 mg/kg in the I-F-2 layer, and 918.92±297.24 mg/kg in the I-F-3 layer. Soil N content decreased with the thickening of the soil layer, and there was a signi?cant difference between the topsoil and other soil layers. In terms of spatial distribution, nitrogen content was higher in the southeastern part of Lianzhou city but lower in the central and southern parts of Lianzhou city, which might be due to the difference in land use. The results revealed the spatial distribution pattern of forest soil nitrogen content in Lianzhou city.
Key words:  forest soil  nitrogen  spatial pattern  soil layer