氮肥添加对青藏高原高寒草甸6个群落优势种生态化学计量学特征的影响

宾振钧, 王静静, 张文鹏, 徐当会, 程雪寒, 李柯杰, 曹德昊

Effects of N addition on ecological stoichiometric characteristics in six dominant plant species of alpine meadow on the Qinghai-Xizang Plateau, China

BIN Zhen-Jun, WANG Jing-Jing, ZHANG Wen-Peng, XU Dang-Hui, CHENG Xue-Han, LI Ke-Jie, CAO De-Hao

表2 氮肥添加对6种群落优势种植物叶片C、N、P含量(g·kg^-1)的影响(平均值±标准误差, n = 6)

Table 2 Effects of nitrogen addition on leaf C, N, and P contents (g·kg^-1) in six dominant plant species (mean ± SE, n = 6)

元素 Element	处理 Treatment	草玉梅 Anemone rivularis	甘肃马先蒿Pedicularis kansuensis	莓叶委陵菜 Potentilla ragarioides	黄花棘豆 Oxytropis ochrocephala	垂穗披碱草 Elymus nutans	嵩草 Kobresia myosuroides
C	N0	431 ± 14.931^a	464 ± 2.480^a	442 ± 3.724^a	467 ± 1.424^a	459 ± 5.314^a	461 ± 4.993^a
	N1	438 ± 15.271^a	466 ± 3.954^a	451 ± 6.083^a	468 ± 3.143^a	460 ± 10.902^a	453 ± 3.444^a
	N2	440 ± 12.064^a	465 ± 6.991^a	456 ± 11.410^a	471 ± 4.913^a	461 ± 11.675^a	463 ± 3.652^a
	N3	445 ± 10.442^a	467 ± 3.992^a	452 ± 13.700^a	461 ± 4.393^a	463 ± 10.904^a	467 ± 6.454^a
N	N0	16.5 ± 1.094^a	17.3 ± 2.087^a	18.1 ± 1.131^a	24.5 ± 1.113^a	16.7 ± 0.036^a	11.5 ± 0.188^a
	N1	18.9 ± 1.298^b	21.1 ± 2.094^b	25.7 ± 2.74^b	22.6 ± 1.190^a	21.2 ± 0.166^b	15.8 ± 0.211^b
	N2	24.1 ± 2.127^c	26.0 ± 1.158^c	29.7 ± 2.144^c	26.8 ± 1.114^a	26.3 ± 0.122^c	18.8 ± 0.212^c
	N3	32.5 ± 2.169^d	32.2 ± 2.087^d	36.7 ± 1.081^d	23.1 ± 1.124^a	31.0 ± 0.366^d	22.8 ± 0.211^d
P	N0	1.716 ± 0.077^a	1.636 ± 0.053^a	1.672 ± 0.083^a	2.509 ± 0.089^a	1.488 ± 0.070^a	1.591 ± 0.077^a
	N1	1.713 ± 0.065^a	1.640 ± 0.070^a	1.682 ± 0.095^a	2.488 ± 0.080^a	1.490 ± 0.081^a	1.575 ± 0.042^a
	N2	1.718 ± 0.076^a	1.638 ± 0.063^a	1.668 ± 0.064^a	2.506 ± 0.114^a	1.478 ± 0.067^a	1.555 ± 0.064^a
	N3	1.721 ± 0.090^a	1.628 ± 0.075^a	1.679 ± 0.071^a	2.511 ± 0.109^a	1.502 ± 0.070^a	1.585 ± 0.073^a