Heat and moisture dynamics in raised field systems of the lake Titicaca region (Bolivia)

Lozada, Diego Sánchez de; Baveye, Philippe C.; Riha, Susan J.

doi:10.1016/s0168-1923(98)00100-2

Cited by 12 publications

(12 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Existe por consiguiente una transferencia de calor en el aire del agua de los canales hacia el cultivo. Sánchez de Lozada et al (1998) demonstraron experimentalmente que la transferencia de calor ocurre esencialmente en el aire y no en el suelo: el flujo de calor en el suelo, de los canales hacia las plataformas, no es suficiente como para contribuir de manera significante al efecto de mitigación de heladas.…”

Section: Resultados Experimentalesunclassified

“…La cantidad importante de calor almacenada dentro de los canales durante el día, debido al calor específico elevado del agua y la intensa radiación solar, sería responsable de este efecto. El reciente y detallado estudio experimental de la dinámica del calor en los camellones por Sánchez de Lozada et al (1998) confirma este hipótesis. Muestra claramente que el efecto de mitigación de heladas es esencialmente la consecuencia de procesos aéreos relacionados con la circulación del aire durante la noche de los canales hacia las plataformas.…”

Section: Introductionunclassified

“…Se presentan a la vez datos experimentales que complementan los de Sánchez de Lozada et al (1998) y un modelo mecanístico que simula las transferencias de calor sensible y de vapor de agua (calor latente) dentro del sistema. En este sentido, el estudio constituye una extensión directa de la investigación reportada en el documento citado.…”

Section: Introductionunclassified

See 2 more Smart Citations

La Mitigación de heladas en los camellones del altiplano andino

Lhomme¹,

Vacher²

2003

bifea

View full text Add to dashboard Cite

Section: Resultados Experimentalesunclassified

Section: Introductionunclassified

See 1 more Smart Citation

La Mitigación de heladas en los camellones del altiplano andino

Lhomme¹,

Vacher²

2003

bifea

View full text Add to dashboard Cite

“…However, due to difficulties routinely experienced during the technological transfer of modern forms of intensive agriculture to subsistence farmers in developing countries, ancient techniques are nowadays increasingly viewed as possible alternatives to improve agricultural productivity. Raised field agriculture, once widespread on most continents (Denevan & Turner, 1974), is one of the ancestral practices that have experienced a dramatic resurgence of interest in the last two decades (e.g., Lennon, 1982;Sanchez de Lozada et al, 1998;Stache, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…However, up to about ten years ago, it was not clear what aspect of this practice had most influence on potato yields, and therefore success could not be guaranteed to farmers before they embarked in the labor-intensive construction of raised fields. In particular, there was little reliable information on the extent to which raised fields might address limitations to agricultural production in the Lake Titicaca region, where the frequency and intensity of mid-season frosts is highly variable (Sanchez de Lozada et al, 1998), water stress situations are common, and soil salinity and low fertility status often severely hamper potato cultivation. In this context, the primary objective of the present study was to observe several factors such as temperature, moisture and soil conditions that are likely to limit potato yields in suka kollus of the Lake Titicaca region.…”

Section: Introductionmentioning

confidence: 99%

Potential limitations for potato yields in raised soil field systems near Lake Titicaca

Lozada

Baveye

Lucey

et al. 2006

Sci. agric. (Piracicaba, Braz.)

Self Cite

View full text Add to dashboard Cite

During the last two decades, various non-governmental organizations have strongly encouraged Bolivian farmers in the Altiplano region near Lake Titicaca to resume the ancestral agricultural practice of constructing raised fields. In addition to improved drainage and possibilities this practice affords for sub-irrigation, advocated benefits of this system traditionally include frost mitigation and high crop yields. Until recently, reliable data to assess the extent of these benefits were unfortunately lacking. In this context, field experiments on raised fields were designed and carried out at two locations in the Bolivian Altiplano to obtain reliable potato yield and temperature data. Observed yields ranged from 2.73 to 10.80 t ha -1 at the first site, where salinity caused significant yield variability (R 2 = 0.79). At the second site, yields per raised platform varied between 8.25 and 33.45 t ha -1 . However, comparable yields were obtained in flat control plots in spite of a mid-season frost, and the minimum temperatures differed only by 1ºC in the conventional plots relative to the raised fields. These results suggest that, under the experimental conditions, the potential benefits of raised fields in terms of frost mitigation or increased yields might only be observable in exceptionally bad years, when extreme frosts wipe out entire potato crops on conventional fields. Nevertheless, it is argued that in spite of these marginally supportive observations, raised-field agriculture may still be a viable option for farmers to consider if the water-filled channels between the raised fields are managed for fish and fertilizer production. Key words: raised fields, productivity, frost mitigation, crop LIMITAÇÕES POTENCIAIS PARA PRODUTIVIDADE DA BATATA EM SOLOS DE CAMPOS ELEVADOS NO LAGO TITICACARESUMO: Nas últimas duas décadas várias organizações não governamentais entusiasmaram lavradores bolivianos da região do Altiplano, próximo ao Lago Titicaca, a reassumir a prática ancestral de construir campos elevados. Além de sua drenagem melhorada e das possibilidades de implementar a sub-irrigação, as vantagens desse sistema tradicional incluem a mitigação da geada e altas produtividades. Até recentemente não havia dados para avaliar estes benefícios. Neste contexto, experimentos realizados em campos elevados foram planejados e executados em dois locais dentro do Altiplano boliviano, para obter dados confiáveis em relação à produtividade da batata e das temperaturas reinantes. As produtividades observadas variaram de 2,73 a 10,80 t ha -1 no primeiro local, no qual a salinidade provocou uma variabilidade significante na produtividade (R 2 = 0,79). No segundo local, as produtividades nas plataformas elevadas variaram de 8,25 a 33,45 t ha -1 . Entretanto, produtividades comparáveis foram obtidas nas áreas controle, mesmo na presença de uma geada no meio da estação e de uma diferença de apenas 1ºC entre as parcelas convencionais e as elevadas. Estes resultados sugerem que nas condições dos experimentos, os benefícios...

show abstract

Comment on “Ecological engineers ahead of their time: The functioning of pre-Columbian raised-field agriculture and its potential contributions to sustainability today” by Dephine Renard et al.

Baveye

2013

Ecological Engineering

View full text Add to dashboard Cite

Heat and moisture dynamics in raised field systems of the lake Titicaca region (Bolivia)

Cited by 12 publications

References 9 publications

La Mitigación de heladas en los camellones del altiplano andino

La Mitigación de heladas en los camellones del altiplano andino

Potential limitations for potato yields in raised soil field systems near Lake Titicaca

Comment on “Ecological engineers ahead of their time: The functioning of pre-Columbian raised-field agriculture and its potential contributions to sustainability today” by Dephine Renard et al.

Contact Info

Product

Resources

About