Enhancing crop productivity via weed suppression in organic no-till cropping systems in Santa Catarina, Brazil

Authors

  • Miguel A Altieri
  • Marcos Alberto Lana
  • Henrique von Hertwig Bittencourt
  • Marcelo Venturi
  • André dos Santos Kieling
  • Jucinei José Comin
  • Paulo Emílio Lovato
Keywords: agroecology, cover crops, mulch, allelopathy, weed suppression, no-tillage

Abstract

Family farmers in Southern Brazil modified the conventional no-till system by flattening cover crop mixtures on the soil surface as strategy to reduce soil erosion and lower fluctuations in soil moisture and temperature, improve soil quality, and enhance weed suppression and crop performance. From 2005 to 2008 three field experiments were done to understand the processes and mechanisms associated in successful organic conservation tillage systems (OCT), especially the underpinnings of ecological weed suppression, a key advantage of OCT systems over conventional no-till systems.The field experiments results as well as farmers observations suggest that cover crops can enhance weed suppression and hence crop yield productivity through physical interference, allelopathy and also a host of effects on soil quality. Results from the trials indicate that: the best cover crops mixture should include a significant proportion of rye, vetch and fodder radish; the mixtures should produce large quantities of biomass; the cover crops and mixtures should be easily suppressed by rolling in order to cover the soil with a thick mulch layer.

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How to Cite
Altieri, M. A., Lana, M. A., von Hertwig Bittencourt, H., Venturi, M., dos Santos Kieling, A., Comin, J. J., & Lovato, P. E. (2012). Enhancing crop productivity via weed suppression in organic no-till cropping systems in Santa Catarina, Brazil. Agroecology, 7(1), 63–71. Retrieved from https://revistas.um.es/agroecologia/article/view/171001
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