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Data/hora: 13/06/2024 17:48:20

Water potential and gas exchanges in sugarcane irrigated with saline waters
Provedor de dados: 91
Autores: Lira,Raquele M. de; Silva,Ênio F. de F. e; Barros,Marcone da S.; Gordin,Leandro C.; Willadino,Lilia G.; Barbosa,Rodrigo F.
ABSTRACT In Pernambuco, state in the northeastern region of Brazil, in the coastal areas, due to the intrusion of seawater, the waters used for sugarcane irrigation can have high salt contents and cause serious problems to soil and plant. The present study aimed to evaluate the effects of irrigation with saline water on the physiology of sugarcane, variety RB867515, irrigated under five salinity levels of 0.5; 2.0; 3.5; 5.0 and 6.5 dS m-1 in a completely randomized design, with four replicates in drainage lysimeters. The study was conducted in the period from December 2014 to June 2015, at the Federal Rural University of Pernambuco (UFRPE). Salinity levels were obtained by dissolving NaCl and CaCl2 in water from the local supply system (ECw = 0.5 dS m-1)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Salinity; Irrigation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001000679

Leaching of cations in soil cultivated with sugarcane subjected to saline irrigation and leaching fractions
Provedor de dados: 91
Autores: Lira,Raquele M. de; Gordin,Leandro C.; Silva,Ênio F. de F. e; Silva,Gerônimo F. da; Dantas,Daniel da C.; Morais,José E. F. de.
ABSTRACT The objective of this study was to evaluate the concentration of cations in the leachate of soil cultivated with sugarcane irrigated with brackish water. An experiment was carried out in drainage lysimeters at the Federal Rural University of Pernambuco, at the Recife campus. The experimental design was completely randomized in a 5 x 2 factorial scheme, with four replicates, corresponding to five levels of electrical conductivity of the irrigation water (ECw) (0.5, 2.0, 3.5, 5.0 and 6.5 dS m-1) and two leaching fractions (LF1 = 0 and LF2 = 0.17) corresponding to water depths equivalent to 100 and 120% of crop evapotranspiration (ETc), by which the irrigations were managed. Electrical conductivity of the drained water was daily monitored and Na, K,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Water salinity; Soluble ions.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000900616

Growth and yield of sugarcane irrigated with brackish water and leaching fractions
Provedor de dados: 91
Autores: Lira,Raquele M. de; Silva,Ênio F. de F. e; Simões Neto,Djalma E.; Santos Júnior,José A.; Lima,Breno L. de C.; Silva,Jucicléia S. da.
ABSTRACT The objective was to evaluate the growth and yield of sugarcane irrigated with brackish water and leaching fractions. A completely randomized experimental design was used, in a 5 x 2 factorial scheme, with four replicates. The treatments consisted of five irrigation water salinity levels (0.5, 2.0, 3.5, 5.0 and 6.5 dS m-1) and two leaching fractions (0 and 0.17), corresponding to 100 and 120% of the crop evapotranspiration. The irrigation management was performed daily. Irrigation water salinity levels were obtained by adding NaCl and CaCl2 to the public-supply water, in order to obtain a molar ratio between Na:Ca of 1:1. The following measurements were taken: height and stem diameter; number of tillers; number of leaves and leaf area with monthly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Salt management; Irrigation; Lysimeters.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000300170

Content, extraction and export of nutrients in sugarcane under salinity and leaching fraction
Provedor de dados: 91
Autores: Lira,Raquele M. de; Silva,Ênio F. de F. e; Silva,Gerônimo F. da; Souza,Diego H. S. de; Pedrosa,Elvira M. R.; Gordin,Leandro C.
ABSTRACT The objective of this study was to evaluate the contents of macronutrients and also chlorine and sodium in the diagnostic leaf, and the extraction and export of macronutrients in sugarcane irrigated with saline water and leaching fractions. The experiment was conducted in a complete randomized design in a 5 x 2 factorial scheme with four replications, corresponding to five levels of water salinity (0.5, 2.0, 3.5, 5.0 and 6.5 dS m-1) and two leaching fractions (L1 = 0 and L2 = 0.17). The treatments were applied 60 days after planting. At 280 days after planting, diagnostic leaves were collected and used to evaluate the nutritional status and the contents of Cl and Na. At 360 days after planting, the sugarcane was harvested and its stalks were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Saline waters; Macronutrients.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000600432

Stress index, water potentials and leaf succulence in cauliflower cultivated hydroponically with brackish water
Provedor de dados: 91
Autores: Cruz,Adiel F. da S.; Silva,Gerônimo F. da; Silva,Ênio F. de F. e; Soares,Hammady R. e; Santos,Jenyffer da S. G.; Lira,Raquele M. de.
ABSTRACT The tolerance of crops to salinity is greater in hydroponic systems due to the low contribution of the matric potential to the total potential of the water. The objective of this study was to evaluate the use of brackish water, to prepare the nutrient solution and replace the evapotranspired volume, and rates of application of this solution on the water stress index, water potential, leaf succulence and water consumption of cauliflower cv. ‘Piracicaba Precoce’. The experimental design was completely randomized in a 6 x 2 factorial scheme, with six salinity levels used to prepare the nutrient solutions (0.2, 1.5, 2.5, 3.5, 4.5 and 5.5 dS m-1) and two application rates of these solutions (1.5 and 2.5 L min-1), with four replicates. Water stress...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water relations; Hydroponics; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000900622