| 基于回归克里格的河北省土壤有机质时空变化特征研究 |
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| 引用本文： | 李可,杨勇,刘亚军,谭秀丽,杨雪,李恩光,吴若景.基于回归克里格的河北省土壤有机质时空变化特征研究[J].中国土壤与肥料,2020(3):1-7. |
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| 作者姓名： | 李可 杨勇 刘亚军 谭秀丽 杨雪 李恩光 吴若景 |
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| 作者单位： | 华中农业大学资源与环境学院，农业农村部长江中下游耕地保育重点实验室，湖北 武汉 430070 |
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| 基金项目： | 基金项目:国家重点研发计划项目(2017YFA0605002)；国家自然科学基金项目(41671217)。 |
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| 摘 要： | 采用GIS空间分析和回归克里格空间插值方法,对1980~2010年间河北省表层土壤有机质(SOM)的时空变化进行对比分析。结果表明:时间上,1980~2010年,河北省SOM含量总体呈降低趋势,SOM平均降低3.6 g/kg。空间上,近30年来全省SOM含量整体上呈现西北减东南增的趋势,增幅总体上由西北向东南依次增加;且SOM含量增加的面积占全省面积的65.54%,主要分布在南部平原地区和唐山、秦皇岛等地。分析表明,这种变化格局的形成主要与施用化肥、实施秸秆还田等人类活动有关。本研究为预测粮食产量、优化施肥管理、保护生态平衡和耕地的可持续发展等提供了科学依据。
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| 关 键 词： | 河北省 有机质 回归克里格 哑变量 时空变化 |
| 收稿时间： | 2019/5/11 0:00:00 |
Characteristics of spatiotemporal variation of soil organic matter in Hebei province based on regression Kriging |
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| LIKe,YANG Yong,LIU Ya -jun,TAN Xiu -li,YANGXue,LI En -guang,WU Ruo -jing.Characteristics of spatiotemporal variation of soil organic matter in Hebei province based on regression Kriging[J].Soil and Fertilizer Sciences in China,2020(3):1-7. |
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| Authors: | LIKe YANG Yong LIU Ya -jun TAN Xiu -li YANGXue LI En -guang WU Ruo -jing |
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| Institution: | (College of Resources and Environment,Huazhong Agricultural University,Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of the Yangtze River),Ministry of Agriculture and Rural Affairs,Hubei Wuhan 430070) |
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| Abstract: | In this paper,Hebei province in North China,was selected as a case for the study.GIS spatial analysis technique,geostatistics analysis method and regression Kriging were used to analysis temporal and spatial changes of soil organic matter(SOM)in Hebei province form 1980 to 2010.The results of above analysis indicated that:temporally,from 1980 to 2010,the content of SOM generally showed a decreasing trend,and its average amount reduced by 3.6 g/kg.Spatially,the content of SOM in Hebei province during the 30-year periods showed overall trend of increasing from the northeast to the southeast.And the increments were generally increased from northwest to southeast.Furthermore,the area of increased SOM accounted for 65.54%of the province’s total area.Both of them were mainly distributed in the southern plains and Tangshan and Qinhuangdao.The final analysis shows that human activities,such as the application of chemical fertilizers and the implementation of straw returning,are the main reasons for the formation of this pattern of change.It is expected that the outcomes of this study can provide scientific basis for predicting grain yield,optimizing fertilization management,protecting ecological balance and sustainable development of cultivated land. |
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| Keywords: | Hebei province organic matter regression Kriging dummy variables temporal and spatial variation |
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