短期施氮肥降低杉木幼林土壤的根系和微生物呼吸

王清奎, 李艳鹏, 张方月, 贺同鑫

Short-term nitrogen fertilization decreased root and microbial respiration in a young Cunninghamia lanceolata plantation

WANG Qing-Kui,LI Yan-Peng,ZHANG Fang-Yue,HE Tong-Xin

表3 施氮肥对杉木幼林土壤微生物量碳及微生物群落结构的影响

Table 3 Effect of N fertilization on soil microbial biomass C (MBC) and microbial community composition in a young Cunninghamia lanceolata plantation

微生物生物量碳 MBC (mg·kg-1) 细菌 Bacteria (nmol·g-1) 真菌 Fungi (nmol·g-1) 细菌:真菌 Bacteria:fungi 放线菌 Actinomyces (nmol·g-1) 革兰氏阳性细菌 Gram-positive bacteria (nmol·g-1) 对照 Control 234 26.25 10.61 2.47 3.99 12.09 施氮 N fertilization 155 19.94 6.76 2.95 3.55 8.90 p <0.001 <0.05 <0.05 >0.05 >0.05 <0.05