呼伦贝尔草地植物茎秆和叶片中养分的时间动态与回收

张效境, 梁潇洒, 马望, 王正文

Temporal variation and resorption of nutrients in plant culms and leaves in Hulun Buir grassland

ZHANG Xiao-Jing, LIANG Xiao-Sa, MA Wang, WANG Zheng-Wen

表2 生长盛期与枯叶期茎秆和叶片养分含量(平均值±标准差)

Table 2 Nitrogen and phosphorus contents of culm and leaf at the growth and senescence stages (mean ± SD)

	器官 Organ	样本量 n	氮含量 Nitrogen content (mg·g^-1)	磷含量 Phosphorus content (mg·g^-1)
生长盛期 Growth stage	叶片 Leaf	22	24.14 ± 6.69^a	2.07 ± 0.71^a
生长盛期 Growth stage	茎秆 Culm	11	12.46 ± 3.94^b	1.18 ± 0.31^b
枯叶期 Senescence stage	叶片 Leaf	22	12.34 ± 4.96^b	0.73 ± 0.39^c
枯叶期 Senescence stage	茎秆 Culm	11	7.32 ± 2.55^c	0.40 ± 0.25^c