Abstract:

In order to analyze the spatio-temporal variability of soil organic matter about alluvial soil in plain area from 1982 to 2009，enhance the cultivated land utilization efficiency, and realize agricultural sustainable development, the author researched the soil organic matter of Minquan county in Henan Province by using statistics, geostatistics and geographical information system (GIS) .The results judging from the space showed that the content of soil organic matter gradually reduced from east to west in 1982, and the content of soil organic matter generally rose to a level in 2009 compared with the 1982, and the most raising place lied in the centre of the studying area. Judging from the time, along with the improvement of fertilization, the rationalization of planting structure, and the increase of water utilization ratio, the soil organic matter content of this study area generally increased from 1982 to 2009. The average value of the soil organic matter content increased from 6.23 g/kg to 13.19 g/kg, increasing by 111.7%. The results by analyzing the change of soil organic matter content in two different period, could provide guidance to fertilize and plan agricultural structure properly.