摘要
为研究地黄对土壤小型动物数量和群落结构的影响,本试验通过在地黄种植田采用人为移除地黄凋落物、添加地黄凋落物和移除地黄根系等处理,定期调查了土壤小型动物的数量变化以及其与环境因子的相关性。结果表明,去除根系使土壤螨类的数量减少26.9%,对跳虫和线虫的数量没有影响;添加凋落物导致螨类和跳虫的数量分别增加73.0%和121.9%;去除凋落物对土壤动物的数量没有影响。螨类和跳虫的数量在9月份和10月份较其他月份多,而线虫的数量在5月份的数量高于其他月份。线性相关分析表明,土壤螨类的数量随着土壤pH值的增加而降低。综上可知,地黄根系对土壤动物的影响大于地上凋落物,且主要通过改变土壤环境起作用。同时,由于不同土壤动物种类对添加凋落物和去除根系响应不同,从而使土壤动物的群落结构也发生了改变。本研究结果为解决地黄连作障碍提供了新的研究思路。
In order to study effect of Rehmannia glutinosa on the number and community structure of small arthropods in soils, the quantitative changes of small arthropods and their correlation with environmental factors were regularly investigated in field by removing litter, adding litter, and removing root of rehmannia. Results showed that removing root reduced the number of soil mites by 26.9% , which was no impact on the number of springtails and nematodes. Adding litter increased the number of mites and springtails by 72.96% and 121.9% , respectively, which indicated that removal of litter had no effect on the number of soil animals. The number of mites and springtails in September and October were higher than in other months, while the number of nematodes in May was the highest in the whole growing season. Correlation analysis showed that the number of soil mites was decreased with the increase of soll pH. It can be seen that the effect of Rehmannia glutinosa on soil fauna is greater than that of aboveground litter, and it is mainly through the change of soil environment. Meanwhile, the community structure of soil fauna had also changed due to the different response of different soil animal species to the addition of litter and removal of root system. The results of this study provide a new way to solve the problem of continuous cropping of Rehmannia glutinosa.
出处
《核农学报》
CAS
CSCD
北大核心
2017年第11期2273-2278,共6页
Journal of Nuclear Agricultural Sciences
基金
河南中医药大学博士基金(BSJJ2015-09)
河南中医学院科研苗圃项目(MP2014046)
河南省重大科技专项项目(171100310500)
关键词
地黄
土壤动物
凋落物
根系
连作障碍
Rehmannia glutinosa, soil animal, litter, root system, continuous cropping obstacles
