Grazing management for more resilient mixed livestock farming systems on native grasslands of southern South America

Pablo Modernel*, Valentin Picasso, Martin Do Carmo, Walter A.H. Rossing, Marc Corbeels, Pablo Soca, Santiago Dogliotti, Pablo Tittonell

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Droughts in southern South America affect grazing systems in many ways. They reduce biomass productivity; decrease livestock feed intake, weight and reproductive performance; increase farmers’ costs; and reduce farm income. It was hypothesized that simple grazing management variables affect the resilience of grazing systems to droughts at the paddock and farm scales. The effects of grazing management on herbage and animal production were assessed at paddock level, and how technological and structural variables relate to the production and economic performances at farm level. Results of a grazing experiment controlling herbage allowance at paddock level showed that resistance of herbage accumulation and animal live weight to drought was significantly higher for paddocks with higher pre-drought herbage allowance than for those managed to low herbage allowance treatments. A strong positive linear relationship was found between pre-drought herbage height and resistance of herbage accumulation rate (p <.01). In a longitudinal study of nine farms in Uruguay, resistance of cow pregnancy rate to drought was positively correlated with cow pregnancy rate (r =.72, p =.02) and farm net income (r =.78, p =.02), and negatively correlated with sheep-to-cattle ratio (r = −.80, p =.01). These correlations suggest that farms with higher incomes and low proportions of sheep in the herd withstand drought better (in terms of pregnancy rate). Four common regional production strategies were identified that react differently when farmers face drought, and these results can aid farmers in those regions to design more resilient mixed livestock farming systems and can inform policymakers about effective strategies for mitigating drought impacts in the region.

Original languageEnglish
Pages (from-to)636-649
JournalGrass and Forage Science
Volume74
Issue number4
Early online date25 Aug 2019
DOIs
Publication statusPublished - Dec 2019

Fingerprint

grazing management
livestock farming
farming system
livestock
farming systems
grasslands
grassland
drought
forage
farm
pregnancy rate
pregnancy
pastures
farms
grazing
income
farmers
sheep
net farm income
South America

Keywords

  • drought
  • grazing management
  • livestock farming systems
  • native grasslands
  • resilience
  • Rio de la Plata grasslands

Cite this

Modernel, Pablo ; Picasso, Valentin ; Do Carmo, Martin ; Rossing, Walter A.H. ; Corbeels, Marc ; Soca, Pablo ; Dogliotti, Santiago ; Tittonell, Pablo. / Grazing management for more resilient mixed livestock farming systems on native grasslands of southern South America. In: Grass and Forage Science. 2019 ; Vol. 74, No. 4. pp. 636-649.
@article{915cd411b1d34e5a9369231b72ebbacb,
title = "Grazing management for more resilient mixed livestock farming systems on native grasslands of southern South America",
abstract = "Droughts in southern South America affect grazing systems in many ways. They reduce biomass productivity; decrease livestock feed intake, weight and reproductive performance; increase farmers’ costs; and reduce farm income. It was hypothesized that simple grazing management variables affect the resilience of grazing systems to droughts at the paddock and farm scales. The effects of grazing management on herbage and animal production were assessed at paddock level, and how technological and structural variables relate to the production and economic performances at farm level. Results of a grazing experiment controlling herbage allowance at paddock level showed that resistance of herbage accumulation and animal live weight to drought was significantly higher for paddocks with higher pre-drought herbage allowance than for those managed to low herbage allowance treatments. A strong positive linear relationship was found between pre-drought herbage height and resistance of herbage accumulation rate (p <.01). In a longitudinal study of nine farms in Uruguay, resistance of cow pregnancy rate to drought was positively correlated with cow pregnancy rate (r =.72, p =.02) and farm net income (r =.78, p =.02), and negatively correlated with sheep-to-cattle ratio (r = −.80, p =.01). These correlations suggest that farms with higher incomes and low proportions of sheep in the herd withstand drought better (in terms of pregnancy rate). Four common regional production strategies were identified that react differently when farmers face drought, and these results can aid farmers in those regions to design more resilient mixed livestock farming systems and can inform policymakers about effective strategies for mitigating drought impacts in the region.",
keywords = "drought, grazing management, livestock farming systems, native grasslands, resilience, Rio de la Plata grasslands",
author = "Pablo Modernel and Valentin Picasso and {Do Carmo}, Martin and Rossing, {Walter A.H.} and Marc Corbeels and Pablo Soca and Santiago Dogliotti and Pablo Tittonell",
year = "2019",
month = "12",
doi = "10.1111/gfs.12445",
language = "English",
volume = "74",
pages = "636--649",
journal = "Grass and Forage Science",
issn = "0142-5242",
publisher = "Wiley",
number = "4",

}

Grazing management for more resilient mixed livestock farming systems on native grasslands of southern South America. / Modernel, Pablo; Picasso, Valentin; Do Carmo, Martin; Rossing, Walter A.H.; Corbeels, Marc; Soca, Pablo; Dogliotti, Santiago; Tittonell, Pablo.

In: Grass and Forage Science, Vol. 74, No. 4, 12.2019, p. 636-649.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Grazing management for more resilient mixed livestock farming systems on native grasslands of southern South America

AU - Modernel, Pablo

AU - Picasso, Valentin

AU - Do Carmo, Martin

AU - Rossing, Walter A.H.

AU - Corbeels, Marc

AU - Soca, Pablo

AU - Dogliotti, Santiago

AU - Tittonell, Pablo

PY - 2019/12

Y1 - 2019/12

N2 - Droughts in southern South America affect grazing systems in many ways. They reduce biomass productivity; decrease livestock feed intake, weight and reproductive performance; increase farmers’ costs; and reduce farm income. It was hypothesized that simple grazing management variables affect the resilience of grazing systems to droughts at the paddock and farm scales. The effects of grazing management on herbage and animal production were assessed at paddock level, and how technological and structural variables relate to the production and economic performances at farm level. Results of a grazing experiment controlling herbage allowance at paddock level showed that resistance of herbage accumulation and animal live weight to drought was significantly higher for paddocks with higher pre-drought herbage allowance than for those managed to low herbage allowance treatments. A strong positive linear relationship was found between pre-drought herbage height and resistance of herbage accumulation rate (p <.01). In a longitudinal study of nine farms in Uruguay, resistance of cow pregnancy rate to drought was positively correlated with cow pregnancy rate (r =.72, p =.02) and farm net income (r =.78, p =.02), and negatively correlated with sheep-to-cattle ratio (r = −.80, p =.01). These correlations suggest that farms with higher incomes and low proportions of sheep in the herd withstand drought better (in terms of pregnancy rate). Four common regional production strategies were identified that react differently when farmers face drought, and these results can aid farmers in those regions to design more resilient mixed livestock farming systems and can inform policymakers about effective strategies for mitigating drought impacts in the region.

AB - Droughts in southern South America affect grazing systems in many ways. They reduce biomass productivity; decrease livestock feed intake, weight and reproductive performance; increase farmers’ costs; and reduce farm income. It was hypothesized that simple grazing management variables affect the resilience of grazing systems to droughts at the paddock and farm scales. The effects of grazing management on herbage and animal production were assessed at paddock level, and how technological and structural variables relate to the production and economic performances at farm level. Results of a grazing experiment controlling herbage allowance at paddock level showed that resistance of herbage accumulation and animal live weight to drought was significantly higher for paddocks with higher pre-drought herbage allowance than for those managed to low herbage allowance treatments. A strong positive linear relationship was found between pre-drought herbage height and resistance of herbage accumulation rate (p <.01). In a longitudinal study of nine farms in Uruguay, resistance of cow pregnancy rate to drought was positively correlated with cow pregnancy rate (r =.72, p =.02) and farm net income (r =.78, p =.02), and negatively correlated with sheep-to-cattle ratio (r = −.80, p =.01). These correlations suggest that farms with higher incomes and low proportions of sheep in the herd withstand drought better (in terms of pregnancy rate). Four common regional production strategies were identified that react differently when farmers face drought, and these results can aid farmers in those regions to design more resilient mixed livestock farming systems and can inform policymakers about effective strategies for mitigating drought impacts in the region.

KW - drought

KW - grazing management

KW - livestock farming systems

KW - native grasslands

KW - resilience

KW - Rio de la Plata grasslands

U2 - 10.1111/gfs.12445

DO - 10.1111/gfs.12445

M3 - Article

VL - 74

SP - 636

EP - 649

JO - Grass and Forage Science

JF - Grass and Forage Science

SN - 0142-5242

IS - 4

ER -