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| 南方丘陵区不同尺度下土壤氮素含量的分布特征 | |
| 引用本文： | 张世熔,孙波,赵其国,李婷,陈明明,黄丽琴.南方丘陵区不同尺度下土壤氮素含量的分布特征[J].土壤学报,2007,44(5):885-892. |
| 作者姓名： | 张世熔 孙波 赵其国 李婷 陈明明 黄丽琴 |
| 作者单位： | 1. 中国科学院南京土壤研究所,南京,210008;四川农业大学资源环境学院,四川雅安,625014 2. 中国科学院南京土壤研究所,南京,210008 3. 四川农业大学资源环境学院,四川雅安,625014 |
| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划) |
| 摘 要： | 利用GPS和GIS技术,研究了江西省兴国县潋水河流域小、中和大3种尺度下土壤氮素的空间分布特征。结果表明,土壤全氮和有效氮在小、中和大3种尺度下呈正态或对数正态分布,但二者均值随研究尺度的扩大而增加。其中,土壤全氮平均含量分别为0.60 g kg-1、0.73 g kg-1和0.83 g kg-1,有效氮含量为64.8mg kg-1、66.3 mg kg-1和80.2 mg kg-1。这3种尺度区土壤全氮和有效氮含量的空间变异函数参数和空间分布特征并不相同。因此,二者空间变异表现出明显的尺度效应。网格抽样和分层抽样相结合的采样方法均适合丘陵区小、中和大3种尺度下土壤氮素分布的研究。它们的合理采样数在90%置信度下分别为原采样方案样点数的82.6%、71.2%和58.1%,在95%置信度下分别是原采样方案样点数的95.7%、94.2%和89.2%。 |
| 关 键 词： | 土壤全氮 土壤有效氮 空间变异 尺度 丘陵区 |
| 收稿时间： | 2006/5/22 0:00:00 |
| 修稿时间： | 2006-05-22 |
DISTRIBUTION CHARACTERISTICS OF SOIL NITROGEN AT MULTI-SCALES IN HILLY REGION IN SOUTH CHINA |
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| Zhang Shirong,Sun Bo,Zhao Qiguo,Li Ting,Chen Mingming and Huang Liqin.DISTRIBUTION CHARACTERISTICS OF SOIL NITROGEN AT MULTI-SCALES IN HILLY REGION IN SOUTH CHINA[J].Acta Pedologica Sinica,2007,44(5):885-892. | |
| Authors: | Zhang Shirong Sun Bo Zhao Qiguo Li Ting Chen Mingming and Huang Liqin |
| Affiliation: | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;College of Resources and Environment, Sichuan Agricultural University, Ya'an, Sichuan 625014, China;Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;College of Resources and Environment, Sichuan Agricultural University, Ya'an, Sichuan 625014, China;College of Resources and Environment, Sichuan Agricultural University, Ya'an, Sichuan 625014, China;College of Resources and Environment, Sichuan Agricultural University, Ya'an, Sichuan 625014, China |
| Abstract: | With GPS and GIS method,the distribution of soil nitrogen at microscale,mesoscale and macroscale was studied in Lianshui Basin,Xingguo County,Jiangxi Province.The results suggest that both the total nitrogen and available nitrogen showed normal or lognormal distribution at the three different scales,but their means increased along the scale up.In the multi-scales,mean total nitrogen contents were 0.60 g kg-1,0.73 g kg-1 and 0.83 g kg-1 respectively,and mean available nitrogen were 64.8 mg kg-1,66.3 mg kg-1 and 80.2 mg kg-1,respectively.The spatial variability of soil total nitrogen and available nitrogen showed obvious scale effect with the different semivariogram parameters and spatial distribution for the multiscales.The combined sampling method of griding with stratifying is suitable for the study of spatial variability of soil nitrogen at the multi-scales in hilly area.Their reasonable sample points were 82.6%,71.2% and 58.1% of the initial sampling points under the 90% confidence level,and those were 95.7%,94.2% and 89.2% under the 95% confidence level,separately. |
| Keywords: | Soil total nitrogen Soil available nitrogen Spatial variability Scale Hilly region |
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