Record ID No. |
6082 |
Author(s) |
Lu X.*, Lu Xi. and Liao Y. , 2018 |
Affiliation |
*College of Agronomy, Ningxia University, Yinchuan, China. |
Title |
Effect of Tillage Treatment on the Diversity of Soil Arbuscular Mycorrhizal Fungal and Soil aggregate-Associates Carbon Content. |
Source. Vol.(no):Page |
Frontiers in Microbiology. 9(2986). |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Methodology |
Host |
Zea mays |
Organism |
Septoglomus spp., Glomus spp. |
Country |
China |
Abstracts |
No-tillage agriculture can sustain productivity and protect the environment. A comprehensive understanding of soil arbuscular mycorrhizal (AM) fungal diversity
and soil carbon distribution within aggregate fractions is essential to the evaluation of no-tillage agriculture. The long-term field experiment included two tillage treatments (1) no tillage with straw returned to the soil (NTS), and (2) conventional mouldboard-plowing
tillage without straw (CT), and was conducted on the Loess Plateau, north-western China, from October 2009. The soil samples were collected from the surface layer (0–20 cm depth) at the maturation stage of the summer maize (Zea mays L.) for analyzing aggregates separated by the dry-sieving method. The organic carbon content in the bulk soil and different particle size aggregates were measured using
the dichromate oxidization method. The species compositions of soil AM fungi were compared by applying high-throughput sequencing of 18S rRNA. The results showed that the NTS had 9.1–12.2% higher percentage of soil macro-aggregates, resulting in 9.8% increase in mean weight diameter and 10.0% increase in bulk soil organic
carbon content as compared with CT treatment. In addition, the NTS treatment had significantly higher percentages of Septoglomus and Glomus than the CT treatment. We also found some significant differences in the fungal communities of the soils of
the two treatments. There was a strong positive relationship between bulk soil organic carbon and the percentages of Septoglomus and Glomus. Our results suggested that the NTS treatment had a protective effect on AM fungal community structures, which
might play a key role in the development of agricultural sustainability in the Loess Plateau
of China. |