Abstract:
In order to investigate the available micronutrient status in tobacco-growing soil in Wulong, Chongqing, we took soil samples before the tobacco was transplanted and fertilized by using GPS. This article takes tobacco-growing soils of Wulong in Chongqing for research object, which references nutrition status of available trace element and combines with GIS plot, analyzes and compares the distribution of Wulong 's trace element about tobacco-growing soil. The results of the study show that the available trace element has a big difference in content. According to all the nutrient levels percentage, the available iron and manganese have a high content, which in nutrition for high level reaching to 96.15% and 96.47% respectively. The content of available copper is high. The available zinc content is medium. The distribution of available trace element has a big variance in different regions in Wulong. In the west including Songming, Miaoya, Yajiang and Qingmu and Mugen town in the north, the available iron has a high content. The available manganese, copper and zinc all have a high content nearby the Yangja wells. These regions are expected to take improvement measures in order to prevent the tobacco poisoning by overabundance content of trace elements.