河北省土壤有机质时空变化分析
发布时间：2019-05-07 23:59
【摘要】：采用BP神经网络和地统计方法,对1980~2009年间河北省耕地土壤有机质时空变化规律及影响因素进行对比分析。结果表明:河北省耕地土壤有机质具有西北高东南低的格局;随着时间的推移,有机质总体呈现上升趋势。1980年的低值区域到了2009年SOM上升变化明显,成为热点;北部坝上、西部太行山区及东部沿海地区到2009年SOM含量下降,成为冷点。分析表明,这种变化格局的形成与施用有机肥、实施秸秆还田等社会经济过程有关。本研究为预测有机质变化趋势、改善土壤质量、优化种植结构和耕地的可持续发展提供了一定依据。
[Abstract]:The temporal and spatial variation of soil organic matter and its influencing factors in Hebei province from 1980 to 2009 were analyzed by using BP neural network and geostatistical method. The results showed that the soil organic matter of cultivated soil in Hebei Province had the pattern of northwest high and low southeast, and the organic matter generally showed an upward trend with the passage of time. The low value region of 1980 had obvious change of SOM in 2009, and became a hot spot. In the northern Bashang, the western Taihang mountain area and the eastern coastal area, the content of SOM decreased in 2009, which became a cold spot. The analysis shows that the formation of this change pattern is related to the socio-economic process such as applying organic fertilizer and returning straw to field. This study provides some basis for predicting the change trend of organic matter, improving soil quality, optimizing planting structure and sustainable development of cultivated land.
【作者单位】： 河北师范大学河北省环境演变与生态建设重点实验室;
【基金】：国土资源大调查农用地分等定级估价项目(200631) 河北省科技计划项目(15457630D)资助
【分类号】：S153.621
本文编号：2471464
[Abstract]:The temporal and spatial variation of soil organic matter and its influencing factors in Hebei province from 1980 to 2009 were analyzed by using BP neural network and geostatistical method. The results showed that the soil organic matter of cultivated soil in Hebei Province had the pattern of northwest high and low southeast, and the organic matter generally showed an upward trend with the passage of time. The low value region of 1980 had obvious change of SOM in 2009, and became a hot spot. In the northern Bashang, the western Taihang mountain area and the eastern coastal area, the content of SOM decreased in 2009, which became a cold spot. The analysis shows that the formation of this change pattern is related to the socio-economic process such as applying organic fertilizer and returning straw to field. This study provides some basis for predicting the change trend of organic matter, improving soil quality, optimizing planting structure and sustainable development of cultivated land.
【作者单位】： 河北师范大学河北省环境演变与生态建设重点实验室;
【基金】：国土资源大调查农用地分等定级估价项目(200631) 河北省科技计划项目(15457630D)资助
【分类号】：S153.621
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