林下植被剔除对杉木林土壤呼吸和微生物群落结构的影响

贺同鑫, 李艳鹏, 张方月, 王清奎

Effects of understory removal on soil respiration and microbial community composition structure in a Chinese fir plantation

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

表4 2013和2014年林下植被剔除对土壤微生物群落结构的影响(平均值±标准误差, n = 3)

Table 4 Effects of understory removal on soil microbial community composition in 2013 and 2014 (mean ± SE, n=3)

	2013		2014
	对照 Control	林下植被剔除 Understory removal	对照 Control	林下植被剔除 Understory removal
总磷脂脂肪酸浓度 Concentration of total phospholipid fatty acids (nmol·g^-1)	36.2 ± 0.7^a	35.2 ± 1.0^a	61.7 ± 2.9^a	55.5 ± 2.4^a
细菌浓度 Concentration of bacteria (nmol·g^-1)	22.6 ± 1.0^a	24.6 ± 1.8^a	38.5 ± 1.5^a	34.9 ± 1.5^a
真菌浓度 Concentration of fungi (nmol·g^-1)	7.4 ± 0.2^a	6.0 ± 0.0^b	14.1 ± 1.0^a	12.1 ± 0.6^a
真菌:细菌浓度比值 Ratio of fungi to bacteria concentration	0.33 ± 0.02^a	0.25 ± 0.02^b	0.37 ± 0.01^a	0.35 ± 0.00^a
革兰氏阳性细菌浓度 Concentration of Gram-positive bacteria (nmol·g^-1)	7.5 ± 0.3^b	9.3 ± 0.3^a	16.6 ± 0.5^a	15.0 ± 0.3^b
革兰氏阴性细菌浓度 Concentration of Gram-negative bacteria (nmol·g^-1)	7.7 ± 0.5^a	8.2 ± 0.1^a	10.1 ± 0.5^a	10.7 ± 0.6^a
革兰氏阳性细菌:革兰氏阴性细菌浓度 Ratio of Gram-positive bacteria to Gram-negative bacteria concentration	0.97 ± 0.05^b	1.1 ± 0.03^a	1.8 ± 0.05^a	1.4 ± 0.06^b
放线菌浓度 Concentration of actinomycete (nmol·g^-1)	3.9 ± 0.2^a	3.7 ± 0.3^a	5.4 ± 0.2^a	5.3 ± 0.1^a