First three subsystems of Karst region urbanization in Guizhou Province were determined by using system theory, namely E......

　　Arbuscular mycorrhizal(AM)fungi and nitrogen-fixing bacteria play important roles in plant growth and recovery in de......

黔中地区是岩溶作用发育的喀斯特区域，１９９３年秋和１９９４年春末采自该地区没类型水样的水化学分析表明，碳酸盐岩裂隙泉水呈中偏碱性，为「Ｃ」Ｃａ－Ⅱ型，秋......