Biological effectiveness studies of eight greenhouse plastics in lettuce cultivation
DOI:
https://doi.org/10.59741/agraria.v19i2.15Keywords:
protected agriculture, effectiveness testsAbstract
In recent years, agriculture shows a tendency to establish crops under cover or greenhouse, seeking to increase production, quality, extend harvest periods and, in short, reduce the negative effects of adverse climatic conditions. With this background, this research was carried out with the purpose of evaluating the biological effectiveness of 8 prototypes of greenhouse foils in lettuce crop during the autumn winter 2019 cycle, compared with 2 commercial PEs. Each PE provided a treatment and each treatment was evaluated in 4 repetitions. Each repetition consisted of a tunnel of 50 m2 (5 + 10 m) and 3.5 m high with anti-aphid mesh side walls. The tunnels were distributed in a randomized complete block design. The variables that were evaluated were: Photosynthetically Active Radiation (PAR), Temperature and Relative Humidity, Stomatic Conductance, Chlorophyll A, B and Total Content, Number, Leaf Length and Width, Fresh and Dry Leaf Weight and Fresh Weight Total to harvest. The variable where a greater difference was obtained, was in the weight at harvest, obtaining lettuces with more development in 3 of the prototypes used.
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