【摘要】 以广西南宁、崇左地区作为典型区,利用AVHRR和MODIS NDVI遥感影像数据,以及1981年、2011年的土壤数据,分析归一化差异植被指数(NDVI)与土壤肥力因子及其变化之间的相互关系。结果表明:近30年来,土壤pH极显著下降,全氮、速效磷、速效钾含量显著上升;同时,NDVI变化整体呈现缓慢上升趋势,且NDVI变化与土壤有机质变化及土壤全氮变化呈显著正相关。因此,NDVI时间序列数据能够在一定程度上反映土壤有机质和土壤全氮含量的变化,这为土壤肥力长期变化监测提供了一种可行的方法。更多还原

【Abstract】 Taking the Nanning and Chongzuo of Guangxi Province, South China as test areas, and by using the time-series NDVI of AVHRR and MODIS sensors and the soil data in 1981 and 2011, this paper analyzed the relationships between the normalized difference vegetation index (NDVI) and soil fertility factors, and the correlations between the long-term changes of the NDVI and soil fertility factors. In recent 30 years, the soil pH in test areas declined significantly, while the soil total nitrogen, available phosphorus, and available potassium contents had a significant increase. Meanwhile, the NDVI presented an overall slow-increasing trend, and the changes of the NDVI had significant positive relationships with those of the soil organic matter and total nitrogen, suggesting that the time-series NDVI could be used to indicate the changes of soil organic matter and total nitrogen to some extent, and hence, provide a feasible method for monitoring the long-term change of soil fertility.更多还原