Influência da cobertura morta na evapotranspiração, coeficiente de cultivo e eficiência de uso de água do milho cultivado em cerrado

Translated title of the contribution: Mulch influence on evapotranspiration, crop coefficient and water use efficiency of corn grown in the savannah

Hipólito Murga-Orrillo, Wellington Farias Araújo, Carlos Abanto-Rodriguez, Roberto Tadashi Sakazaki, Ricardo Manuel Bardales-Lozano, Ana Rosa Polo-Vargas

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Irrigation consumes large amounts of water, and minimizing consumption and maximizing the production are important to a proper crop management. In order to obtain information for irrigation management, the aim of the present study was to determine evapotranspiration (ETc), crop coefficient (Kc) and water use efficiency (WUE) of maize grown in soil with and without cover, during the various stages of development, using drainage lysimeters. The experiment was conducted in Cauamé campus of the Federal University of Roraima, from 19/04/2014 to 08/07/2014, in Boa Vista, RR. The reference evapotranspiration (ETo) was estimated by the Penman-Monteith method. The results of the corn ETc during the crop cycle in soil with and without coverage were 421.5 and 351.0 mm, respectively. The daily average of ETc were 4.1 mm day-1 for bare soil and 3.4 mm day-1 for soil with cover. The ground cover led to different values of Kc's for corn in the same stages as compared to Kc's from the bare ground. For bare soil, the Kc's observed for the phenological stages I, II, III, and IV were 0.40; 0.84; 1.59 and 0.81, respectively. As for covered soil, the Kc's in the same stadiums mentioned were 0.28; 0.64; 1.49 and 0.48, respectively. The WUE to soil with cover was 1.77 kg m-3 and ground without cover was 1.65 kg m-3. These results show that soil mulching influenceS maize water consumption throughout its cycle.

Translated title of the contributionMulch influence on evapotranspiration, crop coefficient and water use efficiency of corn grown in the savannah
Original languagePortuguese
Pages (from-to)352-364
Number of pages13
JournalIRRIGA
Volume21
Issue number2
DOIs
StatePublished - 2016
Externally publishedYes

Keywords

  • Ground covered
  • Irrigation
  • Water consumption
  • Zea mays

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