期刊
APPLIED SOIL ECOLOGY
卷 107, 期 -, 页码 214-223出版社
ELSEVIER
DOI: 10.1016/j.apsoil.2016.06.005
关键词
Saline alkali soil; Catalase activity; Nutrient uptake; Soil microbial diversity; T-RFLP
类别
资金
- National Natural Science Foundation of China [31570514]
- Key Projects in the National Science & Technology Pillar Program [2013BAD05B03]
The aim of this study was to investigate the independent and interactive effectiveness of epigeic earthworms and arbuscular mycorrhizal (AM) fungi as soil conditioners in modifying the properties of salt-affected soil and increasing maize productivity. Treatments included maize plants inoculated vs. not inoculated with AM fungi and treated with or without earthworms. The mycorrhizal colonization, soil pH, electric conductivity (EC), nutrient availabilities and uptakes, catalase, soil microbial biomass C, and Shannon-Wiener index (H) for microbial communities from T-RFLP profiles were measured at harvest. The results showed that erthworms and AM fungi interactively decreased soil pH and EC, and increased the N, P and K content of maize shoot and root and their biomass. Earthworms and AM fungi interactively increased soil organic C, catalase activity and microbial biomass C in the saline alkali soil. Earthworms significantly decreased bacterial diversity, while earthworms and AM fungi interaction significantly increased fungal diversity. Pontibacter and Methylobacteriu were dominant bacteria, and Stachybotrys and Trichoderma were dominant fungi for all treatments. Earthworm addition significantly improved the abundance of Pontibacter and decreased the abundance of Methylobacteriu, which might result in higher soil P availablity and N absorption, respectively. Earthworms, AM fungi and their interaction increased the abundance of Trichoderma but decreased the abundance of Stachybotrys. Maize biomass and nutrient uptakes correlated significantly with the abundance of Trichoderma and Stachybotrys. In conclusion, earthworms, mycorrhiza and their interaction may have a potential role in elevating the chemical and biological properties to alleviate salinity and improve crop productivity in salt-affected soils. (C) 2016 Elsevier BN. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据