植被恢复方式对重度退化草原土壤跳虫群落的影响

Influence of vegetation reclamation type on the characteristics of soil collembola community in seriously alkalinized and degraded grasslands of Songnen Plain.

应用类群数、个体密度和多样性指数等群落参数,研究了植被恢复方式对松嫩草原重度退化草地土壤跳虫群落的影响,以了解退化草地土壤跳虫群落重建的可能性以及不同植被条件下群落恢复的差异.结果表明,围栏封育和种植碱茅2种植被恢复方式均能改善该类退化草地土壤理化性质和跳虫群落环境,提高跳虫类群数、个体密度和多样性;但恢复效果存在明显差异,相对而言,种植碱茅更能显著提高跳虫类群数和个体密度,生物多样性更高,物种更丰富.

Community parameters, such as generic number, individual density and diversity index were applied to study the community structure and the seasonal changes of soil collembolla in seriously alkalinized and degraded grasslands of Songnen Plain. Both fence enclosure and Puccinellia chinampoensis planting substantially improved soil physico-chemical characters and increased soil collembolan communities when compared with the control treatment. However, the generic richness, abundance and biodiversity index of collembolans in P. chinampoensis planting treatment were significantly higher than that of treated with fence enclosure. The results suggest that P. chinampoensis planting is helpful to restore the soil environment and ameliorate collembla community in the seriously alkalinized and degraded grasslands.