Perennial warm-season grass monocultures and mixtures: Biomass production and soil improvement in semiarid and shallow soil conditions

Authors
Paredes, Silvia Susana; Stritzler, Nestor Pedro; Bono, Angel Alfredo; Distel, Roberto Alejandro
Publication Year
2018
Language
English
Format
article
Status
Published version
Description
Perennial warm-season grasses (WSG) represent a viable alternative for cultivation in marginal lands. Moreover, mixtures of WSG can be expected to exceed monocultures in terms of biomass production since biodiversity and ecosystem functions are predominantly positively related. Our objective was to evaluate (1) stockpiled forage accumulation and quality and (2) root biomass in monocultures and mixtures of Panicum virgatum, P. coloratum and Eragrostis superba, and to compare them with a standard monoculture of E. curvula. Additionally, the soil properties under WSG pastures and annual forage crops were compared at the end of the study. The research was conducted in the Dry Pampas of central Argentina, under shallow soil conditions. Stockpiled forage accumulation and root biomass were higher in the most diverse pasture and the mixture of P. virgatum – E. superba than in the monoculture of E. curvula. Stockpiled forage represented an important source of feed for livestock in fall and winter, although of low quality. Soil aggregate stability and initial water infiltration rate were higher in WSG pastures than in adjacent annual forage cropland. Our results suggest that mixtures of WSG can be highly productive in semiarid environments even in shallow soils. Moreover, they can positively influence soil properties.
EEA Anguil
Fil: Paredes, Silvia Susana. INTA. Estación Experimental Agropecuaria Anguil. Agencia de Extensión Rural Guatrache; Argentina
Fil: Stritzler, Nestor Pedro. INTA. Centro Regional La Pampa-San Luis; Argentina
Fil: Bono, Angel Alfredo. INTA. Estación Experimental Agropecuaria Anguil; Argentina
Fil: Distel, Roberto Alejandro. Universidad Nacional del Sur. Departamento de Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
Source
Journal of arid environments 154 : 82-88. (July 2018)
Subject
Monocultivo
Plantas Perennes
Gramineas
Biomasa
Mejora de Suelos
Suelo Semiárido
Forrajes
Panicum Coloratum
Panicum Virgatum
Eragrostis Superba
Eragrostis Curvula
Estación Cálida
Monoculture
Perennials
Grasses
Biomass
Soil Improvement
Semiarid Soils
Forage
Warm Season
C4 Grasses
Pasture Diversity
Stockpiled Forage
Access level
Restricted access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/3945