中国西北针茅草原的基本群落特征

陆帅志, 乔鲜果, 赵利清, 王孜, 高趁光, 王静, 郭柯

Basic characteristics of Stipa sareptana var. krylovii communities in China

LU Shuai-Zhi, QIAO Xian-Guo, ZHAO Li-Qing, WANG Zi, GAO Chen-Guang, WANG Jing, GUO Ke

表1 西北针茅、针茅和新疆针茅形态特征区别(Gudkova et al., 2017)

Table 1 Main differences in the characteristics of Stipa sareptana var. krylovii, S. capillata and S. sareptana (Gudkova et al., 2017)

形态特征 Charaters 针茅 S. capillata 西北针茅 S. krylovii 新疆针茅 S. sareptana 茎秆高度 Length of culm (cm) 30-130 20-60 30-80 叶片宽度 The leaf blade width (mm) 0.5-1.3 0.3-0.6 0.4-0.7 营养枝叶片远轴面 Abaxial surface of vegetative leaves 光滑或粗糙 Glabrous or scabrous 光滑, 极少粗糙 Glabrous or rarely somewhat scabrous 粗糙, 表面有0.25 mm长的微刺 Scabrous due to 0.25 mm long spinules 营养枝叶片近轴面 Adaxial surface of vegetative leaves 具0.2-0.5 mm的毛 With hair 0.2-0.5 mm long 具0.05-0.1 mm的毛 With hair 0.05-0.1 mm long 具0.1 mm的毛, 边缘毛更长 With hair 0.1 mm long, admixture of longer hairs near the margins 营养枝叶舌长度 Ligules of vegetative leaves (mm) (0.6) 1-1.5 (2.5) 0.1-0.3 0.2-1.0 芒长 Length of the awn (cm) 10-18 (8) 12-16 (20) 10-15 芒柱长 Length of column (cm) 3-5 (7.5) (1.8) 2.5-3.5 (4) 2.5-5 外稃长 Length of anthecium (mm) 9-14 (8.5) 9-12 9-11 基盘长 Length of callus (mm) 3.0-4.5 (2.2) 2.4-3.5 (4.5) 2-3 外稃顶端的毛环 Coronula of hairs at the top of lemma 缺失 Absent 存在 Present 存在或稀疏 Present rarely reduced