梧桐 | 27 (33.75) | 72 (41.86) | 35 (50.00) | 4.054 | 0.044* |
榆树 | 53 (66.25) | 111 (64.53) | 54 (77.14) | 1.839 | 0.175 |
葎草 | 11 (13.75) | 24 (13.95) | 8 (11.43) | 0.159 | 0.690 |
艾蒿 | 5 (6.25) | 16 (9.30) | 3 (4.29) | 0.152 | 0.697 |
豚草 | 11 (13.75) | 26 (15.12) | 9 (12.86) | 0.018 | 0.894 |
猫毛 | 16 (20.00) | 40 (23.26) | 11 (15.71) | 0.344 | 0.557 |
狗上皮 | 14 (17.50) | 52 (30.23) | 10 (14.29) | 0.099 | 0.753 |