Annual and Perennial Peanut Mixed with 'Pensacola' Bahiagrass in North Florida

作者:Jaramillo David M*; Dubeux Jose C B Jr; Mackowiak Cheryl; Sollenberger Lynn E; DiLorenzo Nicolas; Rowland Diane L; Blount Ann R S; Santos Erick R S; Garcia Liza; Ruiz Moreno Martin
来源:Crop Science, 2018, 58(2): 982-992.
DOI:10.2135/cropsci2017.09.0542

摘要

Fertilization of perennial grass pastures is a major expense in beef cattle operations, and grass pastures may degrade in the absence of N fertilization. Grass-legume mixtures can reduce the demand for N fertilizer use while increasing productivity of the system. Arachis spp. have shown potential for use in association with grasses in the southeastern United States. During 2014, 2015, and 2016, we evaluated one annual peanut species (Arachis hypogaea L. TUFRunner '727') and two perennial peanut species, pintoi peanut (A. pintoi Krap. & W.C. Greg 'Amarillo') and rhizoma peanut (A. glabrata Benth. 'Florigraze' and germplasm Ecoturf), when planted into previously established 'Pensacola' bahiagrass (Paspalum notatum Flugge) sod. Responses measured included herbage accumulation (HA), botanical composition, nutritive value, biological N-2 fixation, and belowground root-rhizome responses. TUFRunner 727 showed reseeding ability, illustrating potential for use as a short-term forage, but by 2016, its contribution was negligible. In 2016, Ecoturf-bahiagrass had greater HA than unfertilized bahiagrass (4160 and 2710 kg ha(-1), respectively), and the Ecoturf contribution to HA was similar to 30% in 2016. Average N concentrations for Ecoturf and Florigraze were 25 and 22 g kg(-1), respectively, and in vitro digestible organic matter concentration was 700 g kg(-1) for both. Pintoi peanut contributed little to mixture HA in the first 2 yr, but it persisted and increased in proportion with time. Over the course of 3 yr, Ecoturf rhizoma peanut performed better than all other entries, exhibiting increasing participation in mixtures each year and the greatest total HA in 2016.

  • 出版日期2018-4