Micrometeorological modeling and water consumption of tabasco pepper cultivated under greenhouse conditions

Authors

  • Sérgio Weine Paulino Chaves Federal Rural University of the Semi-Arid/UFERSA, Department of Environmental and Technological Sciences, Francisco Mota, 572, 59625-900, Mossoró, RN
  • Rubens Duarte Coelho University of São Paulo/USP-ESALQ, Department of Biosystems Engineering, C.P. 09, 13418-900 Piracicaba, SP
  • Jéfferson de Oliveira Costa University of São Paulo/USP-ESALQ, Department of Biosystems Engineering, C.P. 09, 13418-900 Piracicaba, SP
  • Sergio André Tapparo Federal Institute of Mato Grosso do Sul/IFMS, Campus Ponta Porã, highway BR-463, km 14, 79909-000, Ponta Porã, MS

DOI:

https://doi.org/10.36253/ijam-1221

Keywords:

Capsicum frutescens L., evapotranspiration, lysimetry, micro irrigation

Abstract

Micrometeorological variables of tabasco pepper cultivated under greenhouse and drip irrigated conditions have not been presented to date in literature, especially the water consumption of these plants, in terms of crop evapotranspiration (ETc) and crop coefficient (Kc). The determination of these variables is extremely important for the application of the correct amount of water to irrigated crops in these environments because PM FAO (56) standard methodology was idealized for outdoor environments. The objective of this work was to develop models of estimation of micrometeorological variables in greenhouse conditions and to determine the water demand, in terms of evapotranspiration (ET) and Kc, of the pepper (Capsicum frutescens L.), cv. Tabasco McIlhenny, drip irrigated using drainage lysimeters. The research was carried out in an experimental area located at the University of Sao Paulo (USP) in Piracicaba, SP, Brazil. The following micrometeorological variables were monitored: air temperature, air relative humidity (digital thermohygrometer) and evaporation (mini-pan) (EMT). Drainage lysimeters were used to obtain the ETc and the reference evapotranspiration (ETo) was estimated outside the greenhouse by the Penman Monteith (EToPM), Hargreaves and Samani (EToHS) methods and the class “A” pan method (ECA). It was concluded that the total value of mini-pan evaporation (EMT) inside the greenhouse was practically equal to EToPM, 5% lower than EToHS and 31% higher than ECA in the outdoor environment. ET values ranged from 0.28 to 2.42 mm day-1 and total crop ET was 446.43 mm. The Kc values for the first pepper production cycle were: 0.17 in the initial phase, 0.76 in the flowering and fruiting phase and 0.39 in the harvest phase, for the second production cycle, the value of Kc was 0.50 at the harvest phase.

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Published

2021-08-09

How to Cite

Weine Paulino Chaves, S., Duarte Coelho, R., de Oliveira Costa, J., & André Tapparo, S. (2021). Micrometeorological modeling and water consumption of tabasco pepper cultivated under greenhouse conditions. Italian Journal of Agrometeorology, (1), 21-36. https://doi.org/10.36253/ijam-1221

Issue

Section

RESEARCH ARTICLES