Open AccessProdução de alface crespa, cv. Cristina no semiárido brasileiro com sistema de irrigação subsuperficial de baixo custo
Author(s) -
Carlos Alberto Lins Cassimiro,
Francisco de Sales Oliveira Filho,
Selma dos Santos Feitosa,
Ednaldo Barbosa Pereira,
Eliezer da Cunha Siqueira,
Pedro Alves dos Santos
Publication year - 2020
Publication title -
principia/revista principia
Language(s) - English
Resource type - Journals
eISSN - 2447-9187
pISSN - 1517-0306
DOI - 10.18265/1517-0306a2020v1n52p70-79
Subject(s) - irrigation , randomized block design , evapotranspiration , greenhouse , mathematics , productivity , semi arid climate , environmental science , dry matter , hydrology (agriculture) , horticulture , zoology , agronomy , biology , ecology , geotechnical engineering , arid , economics , macroeconomics , engineering
The Brazilian semiarid has severe climatic conditions including low rainfall rates which constraints agricultural activities in the region. In order to reduce the difficulties of producers in the cultivation of curly lettuce, specifically regarding the efficient use of water, in this study we evaluate the use of social technology “water saving garden” on the effect of different irrigation water depths on the lettuce productivity. The experiment was carried out in a greenhouse at the Federal Institute of Paraíba, in 2018, using a randomized block design, with five treatments and four repetitions. Each treatment consisted of five irrigation depth, corresponding to 25%, 50%, 75%, 100% and 125% ETo (reference evapotranspiration). The results demonstrated that the number of leaves and the dry matter of the aerial part showed quadratic response to the treatments, with maximum values ranging 75% to 99% ETo. The maximum productivity (32.570 kg ha-1) was obtained with the application of the 224.27 mm of irrigation depth; the greatest efficiency in the use of water (269,25 kg ha1 mm1) occurred with 56.88 mm irrigation water depth, corresponding to 25% of ETo.