1. Key Laboratory of Beibu Gulf Environment Change and Resources Utilization of Ministry of Education, Nanning Normal University, Nanning, P. R. China
2. Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, Nanning, P. R. China
3. Guangxi Geographical Indication Crops Research Center of Big Data Mining and Experimental Engineering Technology, Nanning Normal University, Nanning, P. R. China
4. Guangxi key laboratory of Agric-Environment and Agric-Products Safety, Agricultural College, Guangxi University, Nanning, P. R. China