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2 施氮肥对杉木幼林土壤有效养分和细根生物量及细根碳氮含量的影响

Table 2 Effect of N fertilization on soil nutrient availability, biomass, C and N content of fine roots in a young Cunninghamia lanceolata plantation

矿质氮 Mineral N (mg·kg-1) 有效磷 Available P (mg·kg-1) pH 细根生物量 Fine root biomass (g·m-2) 细根碳氮含量 C and N content in fine root (g·kg-1) 碳 C 氮 N C:N 对照 Control 4.94 4.93 4.39 151.1 439.5 6.28 69.9 施氮 N fertilization 13.16 6.49 4.11 102.6 436.2 8.80 49.6 p <0.001 >0.05 <0.01 <0.05 >0.05 <0.01 <0.01