Evaluation Method and Screening of Drought Tolerance of Elite Germplasm in the Early Growth Stage of Sudangrass Fingerprint Constructing and Genetic Diversity Analyzing of Sorghum Sudanense and Sorghum bicolor × Sorghum sudanense with SSR Markers Study on NPK Fertilizer and Nutrients Utilizing Efficiency under Sudangrass and Ryegrass Rotation Regime in Jianghan Plains Effect of Different Clipping Frequencies and Stubble Height on the Yield and Quality of Sorghum Sudanense Stapf. cv. Neinong No.1 Cytogenetical Studies on Sorghum (S. bicolor), Sudangrass (S. sudanense), and Their Hybrid Breeding of Sorghum Bicolor Sorghum Sudanense cv. Mengnong Qingsi No.2 Comparison of phosphorus uptake and accumulation capacity among three plant species Agronomic Traitsand Cytogenetics of Hybrid F1 Generated from Male Sterile Line of Sorghum and Four Kinds of Sorghum sudanense Heterosis Utilization of Hybrid between Sorghum [Sorghum bicolor (L.) Moench] and Sudangrass [Sorghum sudanense (Piper) Stapf]