1. Guangxi Key Laboratory of Agro-Environment and Agric-Products Safety, College of Agriculture, Guangxi University , Nanning 530004 , P. R. China
2. Department of Agricultural Engineering, GuiZhou Vocational College of Agriculture , Qingzhen 550000 , P. R. China
3. Hunan Linji Ecological Technology Co. LtD. , Hunan Province, Changsha 410000 , P. R. China
4. State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University , Nanning 530004 , P. R. China