| 松嫩平原玉米带土壤有机质和全氮的时空变异特征 |
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| 引用本文： | 张春华,王宗明,任春颖,张柏,宋开山,刘殿伟.松嫩平原玉米带土壤有机质和全氮的时空变异特征[J].地理研究,2011,30(2):256-268. |
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| 作者姓名： | 张春华 王宗明 任春颖 张柏 宋开山 刘殿伟 |
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| 作者单位： | 中国科学院东北地理与农业生态研究所;中国科学院研究生院; |
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| 基金项目： | 中国科学院知识创新工程重要方向项目(KZCX2-YW-341); 国家自然科学基金项目(40901096,40871187); 吉林省科技发展计划项目(20080128); 国家重点基础研究发展计划资助(2009CB421103) |
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| 摘 要： | 采用地统计学和GIS相结合的方法,研究了松嫩平原玉米带1980～2005年间土壤有机质和全氮的时空变异特征.结果表明:去除异常值后,土壤有机质和全氮均符合对数正态分布,两个时期土壤有机质的平均含量分别为2.14%和2.54%,土壤全氮的平均含量均为0.12%.通过变异函数分析,两个时期土壤有机质和全氮均符合高斯模型,1...
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| 关 键 词： | 土壤有机质和全氮 地统计学方法 时空变异 松嫩平原玉米带 |
| 收稿时间： | 2010-02-26 |
| 修稿时间： | 2010-07-12 |
Temporal and spatial variations of soil organic and total nitrogen in the Songnen Plain maize belt |
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| ZHANG Chun-hua,WANG Zong-ming,REN Chun-ying,ZHANG Bai,SONG Kai-shan,LIU Dian-wei.Temporal and spatial variations of soil organic and total nitrogen in the Songnen Plain maize belt[J].Geographical Research,2011,30(2):256-268. |
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| Authors: | ZHANG Chun-hua WANG Zong-ming REN Chun-ying ZHANG Bai SONG Kai-shan LIU Dian-wei |
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| Institution: | ZHANG Chun-hua1,2,WANG Zong-ming1,REN Chun-ying1,ZHANG Bai1,SONG Kai-shan1,LIU Dian-wei1(1.Northeast Institute of Geography and Agricultural Ecology,CAS,Changchun 130012,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | Temporal and spatial variations of soil organic matter (SOM) and total nitrogen (TN) contents in the Songnen Plain maize belt for a 25-year period (1980-2005) were evaluated using geostatistics and geographic information system (GIS). Results show that SOM and TN contents were log-normally distributed after excluding the outliers. The average content of SOM in 1980 and 2005 was 2.14% and 2.54%, respectively. The average content of TN was 0.12% in two periods. By performing experimental semivariograms analysis, SOM and TN were best fitted to Gaussian models in 1980 and 2005. The maximum correlative distance of major SOM and TN in contents was 532.6 km and 776.1 km in 1980, but it reduced to 269.7 km and 242.1 km in 2005 respectively. The spatial variability of the contents of SOM and TN was mainly affected by structural factors in 1980. SOM had a moderate spatial variability in 2005 and TN had a weaker spatial autocorrelation compared with that in 1980. The maps of SOM and TN were interpolated using the method of ordinary kriging. Their spatial distributions were very similar to the "high" and "low" content area in two periods, and had obvious geographical distribution with a high content in the central region and a low content in the marginal region. SOM contents increased in different extents in the upland, paddy land, woodland and grassland during 1980-2005, and TN contents increased in the paddy land and woodland. However, TN contents of the upland and grassland remained essentially unchanged. |
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| Keywords: | soil organic matter and total nitrogen geostatistics temporal and spatial variability Songnen Plain maize belt |
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