18
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      ¿Influyen las casas de malla en la evapotranspiración de referencia (ETo)? Translated title: Do mesh houses influence reference evapotranspiration (ETo)?

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Resumen Las casas de malla son una alternativa que permite al agricultor proteger su cultivo de plagas y enfermedades, y permite reducir la aplicación de agroquímicos. Estas casas de malla generalmente se construyen con malla antitrip (pantalla porosa), la cual impide el paso de insectos protegiendo así el cultivo. Como es de esperar, la malla genera un microclima al interior, lo cual podría conllevar un cambio en las necesidades hídricas del cultivo, pero no se tienen estudios en Colombia que cuantifiquen los cambios producidos al interior de estas casas de malla en las variables meteorológicas. Este estudio empleó dos estaciones meteorológicas y dos cenirrómetros sobre superficie de referencia, ubicando un cenirrómetro y una estación al interior de la casa de malla y los otros dos en el exterior, con el objetivo de observar la influencia de la casa de malla en la evapotranspiración de los cenirrómetros y la evapotranspiración de referencia o ETo. Los resultados mostraron que al interior de la casa de malla se redujo la velocidad de viento, la humedad relativa y la radiación solar, y se incrementó la temperatura. Estos cambios generaron la reducción de ETo en un 20 % y la evaporación del cenirrómetro en un 27 %, por lo que se concluye que las casas de malla son una opción para reducir el consumo de agua del cultivo.

          Translated abstract

          Abstract Mesh houses are an alternative that allows farmers not only to protect their crops from pests and diseases but also to reduce the application of agrochemicals. These mesh houses are generally built in an anti-trip net which prevent the access of insects thus protecting the crop. As expected, mesh houses generate a microclimate inside, which could lead to a change in the water needs of the crop. However, there are no studies in Colombia that quantify the changes produced inside these mesh houses in meteorological variables. This study used two meteorological stations and two cenirrometer on a reference surface, locating a cenirrometer and a station inside the mesh house and the other two outside, with the aim of observing the influence of the mesh house on the evapotranspiration of the cenirrometers and the reference evapotranspiration or ETo. The results showed that inside the mesh house, wind speed, relative humidity and solar radiation were reduced, and temperature increased. These changes generated the reduction of ETo by 20 % and the evaporation of the cenirrometer by 27 %, so it is concluded that mesh houses are an option to reduce water consumption of crops.

          Related collections

          Most cited references32

          • Record: found
          • Abstract: not found
          • Article: not found

          Trends in reference crop evapotranspiration over Iran

            Bookmark
            • Record: found
            • Abstract: found
            • Article: found
            Is Open Access

            Physiological characteristics of cassava tolerance to prolonged drought in the tropics: implications for breeding cultivars adapted to seasonally dry and semiarid environments

            The paper summarizes research conducted at International Center for Tropical Agriculture (CIAT) on responses of cassava to extended water shortages in the field aided by modern gas-exchange and water-relation techniques as well as biochemical assays. The aim of the research was to coordinate basic and applied aspects of crop physiology into a breeding strategy with a multidisciplinary approach. Several physiological characteristics/traits and mechanisms underpinning tolerance of cassava to drought were elucidated using a large number of genotypes from the CIAT core germplasm collection grown in various locations representing ecozones where cassava is cultivated. Most notable among these characteristics are the high photosynthetic capacity of cassava leaves in favorable environments and the maintenance of reasonable rates throughout prolonged water deficits, a crucial characteristic for high and sustainable productivity. Cassava possess a tight stomatal control over leaf gas exchange that reduces water losses when plants are subjected to soil water deficits as well as to high atmospheric evaporative demands, thus protecting leaves from severe dehydration. During prolonged water deficits, cassava reduces its canopy by shedding older leaves and forming smaller new leaves leading to less light interception, another adaptive trait to drought. Though root yield is reduced (but much less than the reduction in top growth) under water stress, the crop can recover when water becomes available by rapidly forming new canopy leaves with much higher photosynthetic rates compared to unstressed crops, thus compensating for yield losses with final yields approaching those in well-watered crops. Cassava can extract slowly water from deep soils, a characteristic of paramount importance in seasonally dry and semiarid environments where deeply stored water needs to be tapped. Screening large accessions under seasonally dry and semiarid environments showed that yield is significantly correlated with upper canopy leaf photosynthetic rates, and the association was attributed mainly to nonstomatal (anatomical/biochemical) factors. Parental materials with both high yields and photosynthetic rates were identified for incorporation into breeding and selection programs for cultivars adapted to prolonged drought coupled with high temperatures and dry air, conditions that might be further aggravated by global climate changes in tropical regions.
              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Daily reference evapotranspiration estimates by artificial neural networks technique and empirical equations using limited input climate variables

                Bookmark

                Author and article information

                Journal
                acag
                Acta Agronómica
                Acta Agron.
                Universidad Nacional de Colombia (Palmira, Valle, Colombia )
                0120-2812
                March 2022
                : 71
                : 1
                : 47-54
                Affiliations
                [1] Palmira orgnameUniversidad Nacional de Colombia Colombia rlasprillav@ 123456unal.edu.co
                Article
                S0120-28122022000100047 S0120-2812(22)07100100047
                10.15446/acag.v71n1.96491
                8af39483-dc17-453f-bcff-e018395cc6e4

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 09 June 2021
                : 11 March 2022
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 32, Pages: 8
                Product

                SciELO Colombia

                Categories
                Artículos

                variables meteorológicas,cenirrometer,evapotranspiration,porous screens,Valle del Cauca,meteorological variables,cenirrómetro,evapotranspiración,pantalla porosa

                Comments

                Comment on this article