Resumo

CALDERON RODRIGUEZ, Abelardo  e  CACERES CUNTO, Cesar. Yield of maca (Lepidium meyenii Walp.) in greenhouse conditions using fermented dung and PGPRs under two culture systems in San Pedro de Cajas - Junin, Peru. Ecol. apl. [online]. 2018, vol.17, n.2, pp.132-139. ISSN 1726-2216.  http://dx.doi.org/10.21704/rea.v17i2.1233.

The maca, Lepidium meyenii Walp. culture has been expanded to wild and grassland soils in highland Peruvian central sites, owing to the great demand of the product and to the low productivity per square meter with the traditional methods of culture. In the present work we value the yield of the maca in terms of fresh weigh of hypocotyls as a response to a new technologic package composed by a semicontroled greenhouse ,transplant of maca plantlets, drop watering, alpaca´s fermented dung, PGPR application to the treatments and two culture systems; the vertical one and the horizontal. Statistically, the horizontal system is better than the vertical and besides, the treatment "virgin soil plus alpaca´s fermented dung" gives the better results than other treatments. The application of the plant growth-promoting rhizobacteria (PGPR) on the treatments do not had positive effects on yields. According to the micrometeorological data registered on the greenhouse, the conditions of light intensity, day and night temperature and CO₂ concentration were benign for the maca (C3 plant) inside the greenhouse. To conclude, the yield of fresh maca hypocotyls with this new system is 3.5 to 4 times more than the traditional method and besides the vegetative cycle shortens so we can cultivate twice a year.

Palavras-chave : greenhouse; yield; maca; hypocotyls; PGPR.

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