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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(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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李可(1997-),女,湖北潜江人,硕士研究生,主要研究方向为地统计学及其应用。E-mail:mirrorli@webmail.hzau.edu.cn。

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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)。


Characteristics of spatiotemporal variation of soil organic matter in Hebei province based on regression Kriging
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(College of Resources andEnvironment,Huazhong AgriculturalUniversity,Key Laboratory of Arable LandConservation(Middle and Lower Reachesof the YangtzeRiver),Ministry of Agriculture and RuralAffairs,Hubei Wuhan430070)

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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3.6g/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。

    Abstract:

    In thispaper,Hebei province in NorthChina,was selected as a case for the study.GIS spatial analysistechnique,geostatistics analysis method and regression Kriging were used to analysis temporal and spatial changes of soilorganicmatter(SOM)in Hebei province form 1980 tO2010.The results of above analysis indicatedthat:temporally,from 1980 tO2010,the content of SOM generally showed a decreasingtrend,and its average amount reduced by 3.6g/kg.Spatially,the content of SOM in Hebei province during the 30 -year periods showed overall trend of increasing from thenortheast to thesoutheast.And the increments were generally increased from northwest tosoutheast.Furthermore,the area of increased SOM accounted for 65.54% of the province’s total area.Both of them were mainly distributed in the southernplains and Tangshan andQinhuangdao.The final analysis shows that humanactivities,such as the application of chemicalfertilizers and the implementation of strawreturning,are the main reasons for the formation of this pattern of change. Itis expected that the outcomes of this study can provide scientific basis for predicting grain yield,optimizing fertilizationmanagement,protecting ecological balance and sustainable development of cultivated land.

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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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  • 收稿日期:2019-05-11
  • 最后修改日期:
  • 录用日期:2019-07-14
  • 在线发布日期: 2020-07-13
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