Application of GIS technique in the distribution of nutrients in tropical arable land: A case study of Longjiang Farm, Hainan Island

摘要

Exploring the distribution of soil pH and nutrients are significant to the sustainable development of tropical agricultural growth. Taking Longjiang Farm in Hainan province as the research plot, and exploring the distribution characteristics of soil nutrients in study area by applying the GIS spatial analysis tools. The results indicated that the soil is acidic and the contents of soil nutrients are varied significantly in research area. The spatial distributions of available Ca, available Mg. available Cu and available Zn were mainly determined by the distributions of soil parent materials. The contents of soil organic matters and total N are escalated gradually from north to south in study area. The spatial analysis tools can be applied to explore the distribution of soil nutrients in areas, which is significant to the regional agricultural planning.