添加蚯蚓后入侵植物喜旱莲子草的生长状况

Growth status of invasive plant Alternanthera philoxeroides after adding earthworms

由于入侵生物自身体内的化学物质影响到土壤动物和土壤过程,试验采用土壤常见动物蚯蚓和重要入侵植物喜旱莲子草[Alternanthera philoxeroides(Mart.)Griseb.]为材料,研究蚯蚓对喜旱莲子草生理生化指标及生长的影响。结果表明,喜旱莲子草叶片中叶绿素a、叶绿素b、类胡萝卜素的含量和叶绿素总量随着添加蚯蚓数量的增加而增加;喜旱莲子草叶片淀粉和非结构性碳水化合物(NSC)的含量随着添加蚯蚓数量的增加呈递增趋势;随着添加蚯蚓数量的增加,喜旱莲子草单位面积质量和分蘖数呈上升趋势。由此可知,土壤动物蚯蚓有利于入侵植物喜旱莲子草生长。

Because the chemical substances in the invasive organisms themselves affected soil animals and soil processes,this experi⁃ment used earthworms,a common soil animal,and Alternanthera philoxeroides(Mart.)Griseb.,an important invasive plant,as mate⁃rials to study the effects of earthworms on physiological and biochemical indexes and growth of A.philoxeroides.The results showed that the content of chlorophyll a,chlorophyll b,carotenoid and total chlorophyll in leaves of A.philoxeroides increased with the increase of of the number of earthworms.The contents of starch and non-structural carbohydrate(NSC)in the leaves of A.philoxeroides increased with the increase of the number of earthworms.With the increase of the number of earthworms,the mass per unit area and tiller num⁃ber of A.philoxeroides showed an upward trend.It could be seen that soil animals earthworms were beneficial to the growth of the inva⁃sive plant A.philoxeroides.