2009
DOI: 10.5039/agraria.v4i4a13
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Efeitos de diferentes lâminas de irrigação na produtividade da mamoneira variedade IAC Guarani

Abstract: Com o objetivo de avaliar os fatores produtivos da variedade de mamoneira IAC Guarani (Ricinus communis L.), sob diferentes lâminas de irrigação, foi instalado um ensaio em uma área experimental da Universidade Federal do Ceará, no município de Fortaleza (03°44'S; 38°33'W; 19,5 m). A semeadura foi feita em covas, espaçadas de 1,0 x 1,0 m. Durante o ciclo da mamoneira, as plantas foram irrigadas diariamente, por gotejamento. As lâminas de irrigação foram quantificadas a partir da evaporação medida no tanque cla… Show more

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Cited by 7 publications
(5 citation statements)
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“…Furthermore, there was a significant effect from the mulch on the castor bean crop, since it resulted in an increase of the order of 31.09% in fruit productivity, improving crop performance compared to that seen in bare ground. However Moreira et al (2009), in Fortaleza, Ceará, evaluated production factors in the IAC Guarani variety of castor bean under different levels of drip irrigation, also quantified from the evaporation measured in a Class "A" tank, and found that irrigation based on an estimated 100% ECA provided the highest total fruit yield, of approximately 4,100 kg ha -1 , higher than the values found in this study.…”
Section: Resultsmentioning
confidence: 43%
“…Furthermore, there was a significant effect from the mulch on the castor bean crop, since it resulted in an increase of the order of 31.09% in fruit productivity, improving crop performance compared to that seen in bare ground. However Moreira et al (2009), in Fortaleza, Ceará, evaluated production factors in the IAC Guarani variety of castor bean under different levels of drip irrigation, also quantified from the evaporation measured in a Class "A" tank, and found that irrigation based on an estimated 100% ECA provided the highest total fruit yield, of approximately 4,100 kg ha -1 , higher than the values found in this study.…”
Section: Resultsmentioning
confidence: 43%
“…Thus, irrigation management in the potato crop should be carried out in such a way that the current water table in the soil remains close to the limit representing its total water capacity to avoid large losses of productivity. On the other hand, it is worth pointing out that high soil moisture can lead to hypoxia (decreased O 2 pressure) or anoxia (lack of O 2 ), reducing plant metabolic activity, altering its metabolism and causing stress (MOREIRA et al, 2009).…”
Section: Resultsmentioning
confidence: 99%
“…A primeira e mais sensível resposta ao déficit hídrico na planta é a diminuição da turgescência, associada a esse evento, a diminuição do processo de crescimento (particularmente o crescimento em extensão), devido à redução do metabolismo das proteínas e dos aminoácidos, que causa a interrupção da divisão celular (LARCHER, 2000). Por outro lado, o excesso hídrico causa a falta de oxigênio, prejudicando a respiração e a assimilação dos fotoassimilados (MOREIRA et al, 2009), que também pode resultar em redução no crescimento das plantas e até na morte das mesmas (SEVERINO et al, 2005).…”
Section: Resultsunclassified