黄土高原优势灌丛营养器官化学计量特征的环境分异和机制

李单凤, 于顺利, 王国勋, 方伟伟

Environmental heterogeneity and mechanism of stoichiometry properties of vegetative organs in dominant shrub communities across the Loess Plateau

LI Dan-Feng,YU Shun-Li,WANG Guo-Xun,FANG Wei-Wei

表1 黄土高原优势灌丛植物营养器官的碳(C)、氮(N)、磷(P)浓度及其比值(平均值±标准偏差)

Table 1 Concentrations of carbon (C), nitrogen (N) and phosphorous (P) of plant vegetative organs in the dominant shrubs communities across the Loess Plateau (mean ± SD)

器官 Organs	n	C (mg·g^-1)	N (mg·g^-1)	P (mg·g^-1)	C:N	C:P	N:P
叶 Leaf	101	421.40 ± 46.66^c	23.43 ± 8.00^a	1.20 ± 0.50^a	20.23 ± 7.62^b	411.46 ± 194.76^b	20.81 ± 6.15^a
茎 Stem	125	459.55 ± 24.50^a	10.58 ± 3.79^b	0.56 ± 0.21^b	51.22 ± 24.13^a	922.88 ± 353.36^a	20.06 ± 8.04^a
根 Root	129	444.87 ± 29.13^b	11.40 ± 4.85^b	0.57 ± 0.29^b	48.68 ± 26.05^a	974.25 ± 472.28^a	22.54 ± 10.33^a