Nutrient uptake in sesame cultivars under cultivation in semiarid conditions
Keywords:Sesamum indicum, Macronutrients, Collection season
Sesame is considered the oldest oleaginous seed in use by mankind. It is a culture of high morphophysiological complexity with great variability in growth habit. The accumulation of nutrients in the sesame crop is, in relative terms, proportional to its average productivity. It is a crop that requires the availability of sufficient amounts of nitrogen, phosphorus and potassium to obtain a desired yield.Â Thus,Â the aim of this study wasÂ toÂ assess the uptake of nutrientsÂ forÂ sesame cultivarsÂ in two growing seasons conditions semiarid.Â TheÂ experimentsÂ were performedÂ in Horta Didatics of Universidade Federal Rural do Semi-Ãrido, in Brazil,Â fromÂ NovemberÂ 2014 to February 2015 (Growing Season I);Â and from April to July 2015Â (Growing SeasonÂ II).Â The experimental designÂ wasÂ a randomized complete block design with four replications.Â Treatments were arranged inÂ aÂ split plot whereÂ cultivars (CNPAÂ G2, CNPA G3, and CNPAÂ G4)Â were placed on theÂ following plotsÂ withÂ harvesting dates 21,Â 35, 49, 63, 77, 91, and 105Â days after sowing (DAS)Â of subplots. The vegetative part of the sesame crop had greater uptake of potassium in Growing Season I (the period from November 2014 to February 2015) and of nitrogen in Growing Season II (the period from April to July 2015) for all the cultivars, whereas in the fruits the greatest uptake was that of nitrogen, independent of growing season.Â As for theÂ totalÂ uptakeÂ of nutrients at the end of the cycle, it followed the descending order N > K > P in both growing seasons. The period of greatest demand for nutrients occurred between 77 and 105 DAS.Â In relation to the cultivars, the CNPA G3 obtained larger uptakes in Growing Season I (the period from November 2014 to February 2015), while the CNPA G4 did so in Growing Season II (the period from November 2014 to February 2015).
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Copyright (c) 2019 Rayanne Maria Paula Ribeiro, José Ricardo Tavares de Albuquerque, Carla Caroline Alves Pereira, Luiz Aurélio Freitas Pereira, Aurélio Paes Barros Júnior, Lindomar Maria da Silveira, Leilson Costa Grangeiro
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