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为了剖析平原潮土区1982年和2009年2期土壤有机质的时空变化情况,提高耕地利用效率和实现农业可持续发展,笔者采用统计学、地统计学和地理信息系统(GIS)相结合的方法,研究了河南省民权县土壤有机质含量(SOM)的时空变异特征。结果表明:空间上,1982年土壤有机质含量自东向西逐渐降低;与1982年相比,2009年的土壤有机质含量普遍增加1个级别,增加最多的区域分布在研究区域的中部。时间上,1982—2009年,随着施肥量的增加、施肥水平的提高,种植结构的合理化和水利资源利用率的提高,整个研究区域土壤有机质含量普遍增加。有机质含量平均值从6.23g/kg增加到13.19g/kg,增加了111.7%。2个时期土壤分析得到的结果对合理施肥、农业种植区划具有指导意义。
In order to analyze the temporal and spatial changes of soil organic matter in 1982 and 2009 in the plain fluvial region, and to improve the utilization efficiency of cultivated land and realize the sustainable development of agriculture, the author combined the methods of statistics, geostatistics and geographic information system (GIS) , Studied the characteristics of spatio-temporal variations of soil organic matter (SOM) in civil rights counties in Henan Province. The results showed that: in space, soil organic matter content gradually decreased from east to west in 1982; compared with 1982, the content of soil organic matter in 2009 generally increased by 1 level, and the most increased area was located in the middle of the study area. In time, from 1982 to 2009, with the increase of fertilization, fertilization, rationalization of planting structure and utilization of water resources, soil organic matter content generally increased in the whole study area. The average content of organic matter increased from 6.23g / kg to 13.19g / kg, an increase of 111.7%. The result of soil analysis in two periods is instructive for rational fertilization and agricultural planting zoning.