Agroclimatic constraints for rainfed agriculture in the Bolivian Altiplano

Magalí Garcia Cárdenas, D. Raes, S. E. Jacobsen, T. Michel

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

100 Citas (Scopus)

Resumen

The agroclimatic potential was analyzed for four locations in the Bolivian Altiplano (highland) and used to delineate regional agroclimatic variability. A downward trend from North to South was observed in temperature, the onset and the duration of the rainy season, indicating that climate-wise crop production is only possible during 5 months in the north and less than 4 months in the south. A clear negative relationship between the day of onset and the duration of the rainy season was detected. Even in years with 50% dependable precipitation, the cumulative rainfall depth is less than the reference evapotranspiration calculated by the Penman-Monteith equation, and the erratic occurrence of long dry spells seriously affect crop growth. The adverse climatic conditions call for an agroclimatic-based action plan to improve the agricultural output of a region blessed with high and fairly constant levels of radiation. Actions worth to be considered are the introduction of deficit irrigation, protected intensive cropping, and the cultivation of crop species and varieties that require a short growing season, tolerate low water availability, and are resistant to early or late frosts.

Idioma originalInglés
Páginas (desde-hasta)109-121
Número de páginas13
PublicaciónJournal of Arid Environments
Volumen71
N.º1
DOI
EstadoPublicada - oct. 2007

Nota bibliográfica

Funding Information:
This work was produced as part of a Doctoral Research supported by the Faculty of Agronomy of the State University San Andrés in La Paz (Bolivia) and a Grant from the Katholieke Universiteit Leuven (K.U.Leuven), Leuven (Belgium). The authors like to acknowledge the review of the manuscript by Dr. Jan Feyen of the Department of Land Management and Economics, Faculty of Bioscience Engineering, K.U.Leuven.

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