The impact of composite improvement measures on soil properties and vegetation characteristics of degraded natural grasslands in Karst mountainous areas

• SUN Bo, 
• WU Ying, 
• ZHOU Darong, 
• PENG Hua, 
• LI Changyan, 
• RAO Rong, 
• ZHANG Shouwen, 
• SONG Derong, 
• GUO Zhengang, 
• WU Jiahai