摘要
运用ArcGIS的地统计学和空间分析模块,研究了封丘县20年前后土壤表层有机质、全氮、碱解氮、速效磷和速效钾5种养分的含量水平、分布以及演变趋势。研究结果表明,封丘县土壤有机质含量明显上升,氮素有所积累;磷素有升有降,以升为主;但速效钾含量急剧下降,这些变化与封丘县长期以来的肥料施用和土地利用有关。运用地理信息系统和地统计学方法能够很好地模拟土壤养分的空间分布特征,便于研究者直观地发现土壤养分时空变化趋势。
The geostatistical analysis model and spatial analysis model of ArcGIS were applied to mvesugate the temporal- spatial variability of the organic matter, total nitrogen, available nitrogen, available phosphorus and available potassium in soil surface of Fengqiu County for over 20 years. The results showed that the content of soil organic matter, total nitrogen, available nitrogen, available phosphorus have gone up, but the content of available potassium has come down rapidly. These changes are related to the use of fertilizer and land. It is indicated that the distribution character and temporal - spatial variability of soil nutrients can be discovered effectively by applying geographic information system and geostatistics methods.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2007年第2期312-317,共6页
Acta Agriculturae Universitatis Jiangxiensis
基金
江西省自然科学基金项目(0330065
0630050)
江西省科技攻关项目([2004]211号)
