摘要
研究在清远市针阔混交林地进行0~80 cm土壤采样,分析测试土壤TN含量,运用Arc GIS技术,揭示清远市针阔混交林地土壤TN的空间分布格局特征。结果表明:清远市针阔混交林地土壤D1,0~20 cm土壤层TN含量为0.28~4.07 g/kg,平均值为1.31 g/kg;D2土壤层TN含量为0.26~3.86 g/kg,平均值为1.20 g/kg;D3土壤层TN含量为0.27~4.41 g/kg,平均值为1.13 g/kg;D4土壤层TN含量为0.29~3.96 g/kg,平均值为1.16 g/kg。土壤氮元素含量在垂直空间上的分布格局分析结果表明,氮元素含量在D1土壤层最高,在D1~D3土壤层随着土壤深度的增加,氮元素含量逐渐下降,D4土壤层有略微的上升趋势。清远市针阔混交林地土壤TN含量在水平空间分布上有较大的差异,高值区域主要分布在清远市针阔混交林地的中部、东部,还有部分零散分布。北部、东南部区域的TN含量最低,整个清远市针阔混交林地土壤TN含量呈中部高,四周低的分布特征。
The soil TN content was analyzed and tested by sampling the soil of coniferous and broad~leaved mixed woodland in Qingyuan city(0-80 cm),and the spatial distribution pattern of soil TN in coniferous and broad-leaved mixed woodland in Qingyuan city was revealed by using Arc GIS technology.The results showed that TN content in D1 soil layer was 0.28-4.07 g/kg,with an average value of 1.31 g/kg.TN content in D2 soil layer ranged from 0.26 to 3.86 g/kg,with an average of 1.20 g/kg.TN content in D3 soil layer ranged from 0.27 to 4.41 g/kg,with an average of 1.13 g/K.TN content in D4 soil layer ranged from 0.29 to 3.96 g/kg,with an average of 1.16 g/kg.The analysis of the distribution pattern of soil nitrogen content in the vertical space showed that the nitrogen content was the highest in the D1 soil layer,and decreased gradually in the D1-D3 soil layer with the increase of soil depth,and then increased slightly in the D4 soil layer.The soil total nitrogen content of mixed coniferous and broad-leaved forests in Qingyuan city was different in horizontal spatial distribution,and the high value areas were mainly distributed in the middle and east of mixed coniferous and broad-leaved forests in Qingyuan city,and some scattered areas.The total nitrogen content in the northern and southeastern regions was the lowest,and the total nitrogen content in the mixed coniferous and broad-leaved forests in Qingyuan city showed the distribution characteristics of high in the middle and gradually decreasing in the surrounding areas.
作者
邹祖有
康剑
李莹莹
余斐
朱航勇
苏艳
丁晓纲
ZOU Zuyou;KANG Jian;LI Yingying;YU Fei;ZHU Hangyong;SU Yan;DING Xiaogang(College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou,Guangdong 510642,China;Guangdong Key Laboratory of Silviculture,Protection and Utilization/Guangdong Academy of Forestry,Guangzhou,Guangdong 510520,China;South China Botanical Garden,Chinese Academy of Sciences,Guangzhou,Guangdong 510650,China)
出处
《林业与环境科学》
2022年第4期75-81,共7页
Forestry and Environmental Science
基金
广东省生态林业建设项目“林地土壤调查”
广东省林业科技计划项目(2019-07)
广东省省级生态公益林效益补偿资金省统筹经费项目。
关键词
针阔混交林
森林土壤
全氮
空间分布
coniferous and broad-leaved mixed forest
forest soil
total nitrogen
spatial distribution
