1. Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China
2. Key Laboratory for Protected Agriculture Engineering in the Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, Nanjing, Jiangsu, China
3. Department of Soil and Water Science, Tropical Research and Education Center, IFAS, University of Florida, Homestead, FL, USA