Article Open Access
refereed
published

Soil bacterial community response to rhizoma peanut incorporation into Florida pastures

Affiliation
North Florida Research and Education Center, Univ. of Florida, 155 Research Road, Quincy, FL 32351, USA
Guerra, Victor A.;
GND
1235725251
Affiliation
Julius Kühn-Institute (JKI), Institute for Ecological Chemistry, Plant Analysis and Stored Product Protection, Germany
Beule, Lukas;
Affiliation
North Florida Research and Education Center, Univ. of Florida, 155 Research Road, Quincy, FL 32351, USA
Mackowiak, Cheryl L.;
Affiliation
North Florida Research and Education Center, Univ. of Florida, 3925 Highway 71, Marianna, FL 32446, USA
Dubeux, Jose C. B. Jr.;
Affiliation
North Florida Research and Education Center, Univ. of Florida, 155 Research Road, Quincy, FL 32351, USA
Blount, Ann R. S.;
Affiliation
State Key Laboratory of Grassland Agroecosystems, Center for Grassland Microbiome, and College of Pastoral, Agriculture Science and Technology, Lanzhou Univ., Lanzhou 730020, PR China
Wang, Xiao‐Bo;
Affiliation
Agronomy Dep., Univ. of Florida, Gainesville, FL 32611, USA; Current address: College of Natural Sciences Forestry, and Agriculture, Univ. of Maine, Orono, ME 04469, USA
Rowland, Diane L.;
Affiliation
North Florida Research and Education Center, Univ. of Florida, 155 Research Road, Quincy, FL 32351, USA
Liao, Hui‐Ling

Incorporating legumes is one option for improving pasture fertility, sustainability, and biodiversity. Diazotrophic microorganisms, including rhizobia that form symbioses with legumes, represent a small fraction of the total soil microbial community. Yet, they can offset nitrogen (N) fertilizer inputs, through their ability to convert atmospheric N2 into plant-usable N via biological N2 fixation (BNF). This study utilized amplicon sequencing of 16S rRNA genes to investigate soil bacterial community composition and diversity in grazed ‘Argentine’ bahiagrass (Paspalum notatum Flügge) pastures where N fertilizer was supplanted with legume derived N from BNF in some treatments. Treatments consisted of bahiagrass fertilized with 1) mineral N (224 kg N ha–1yr–1), 2) combination mineral N (34 kg N ha–1yr–1) and legume derived N via cool-season clover (Trifolium spp.) mix, or 3) combination mineral N (34 kg N ha–1yr–1), and legume derived N via cool-season clover mix and strips of Ecoturf rhizoma peanut (Arachis glabrata Benth.). Bradyrhizobium spp. relative abundance was 44% greater in the mixed pasture. Other bacterial genera with BNF or denitrification potentials were greater in pastures with legumes, while sequences assigned to genera associated with high litter turnover were greater in bahiagrass pastures receiving only mineral N. Soil bacteria alpha diversity was greater in pastures receiving 34 kg ha–1 yr–1 N fertilizer application and the cool-season clover mix than in pastures with the cool-season clover mix and rhizoma peanut strips. Our results demonstrate soil microbial community shifts that may affect soil C and N cycling in pastures common to the southeastern United States.

Preview

Cite

Citation style:
Could not load citation form.

Access Statistic

Total:
Downloads:
Abtractviews:
Last 12 Month:
Downloads:
Abtractviews:

Rights

License Holder: The Authors.

Use and reproduction: