河北省土壤有機質時空變化分析
發(fā)布時間：2019-05-07 23:59
【摘要】：采用BP神經網絡和地統(tǒng)計方法,對1980~2009年間河北省耕地土壤有機質時空變化規(guī)律及影響因素進行對比分析。結果表明:河北省耕地土壤有機質具有西北高東南低的格局;隨著時間的推移,有機質總體呈現上升趨勢。1980年的低值區(qū)域到了2009年SOM上升變化明顯,成為熱點;北部壩上、西部太行山區(qū)及東部沿海地區(qū)到2009年SOM含量下降,成為冷點。分析表明,這種變化格局的形成與施用有機肥、實施秸稈還田等社會經濟過程有關。本研究為預測有機質變化趨勢、改善土壤質量、優(yōu)化種植結構和耕地的可持續(xù)發(fā)展提供了一定依據。
[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.
【作者單位】： 河北師范大學河北省環(huán)境演變與生態(tài)建設重點實驗室;
【基金】：國土資源大調查農用地分等定級估價項目(200631) 河北省科技計劃項目(15457630D)資助
【分類號】：S153.621
本文編號：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.
【作者單位】： 河北師范大學河北省環(huán)境演變與生態(tài)建設重點實驗室;
【基金】：國土資源大調查農用地分等定級估價項目(200631) 河北省科技計劃項目(15457630D)資助
【分類號】：S153.621
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