Journal of Food, Agriculture and Environment

Nitrogen and sulfur sources in the culture of Brassica napus L. var. oleifera

Author(s):

Reginaldo Ferreira Santos ¹, Augustinho Borsoi ^1*, Deonir Secco ¹, Samuel Nelson Melegari de Souza ¹, Elisandro Pires Frigo ²

Recieved Date: 2011-09-20, Accepted Date: 2012-01-05

Abstract:

The interest in the production of rapeseed (Brassica napus L. var. oleifera) has been growing in Brazil and around the world due to the nutritional values of its oil as food and in the production of biodiesel. The rapeseed develops better in fertile soils, requiring nitrogen (N) and sulfur (S). The aim was to evaluate the effect of top dressing with N and S by phenometric parameters in the production of rapeseed crops. The experiment was conducted in the field in the city of Nova Aurora, Paraná, Brazil. A randomized block design was used, with five treatments and four repetitions. The treatments are as follows: T1 Witness; T2 38 kg ha^-1 N from urea ((NH₂)2CO); T3 19 kg ha^-1 S; T4 17 kg ha^-1 N + 18 kg ha^-1 S from ammonium sulfate (NH₄)2SO₄ e T5: 186 mL ha ^-1 nitrogen + 55.8 mL ha^-1 sulfur (leaf fertilizer). The variables analyzed were: height of plant, root length, dry mass of plant, thousand-grain mass, number of pods, number of seeds per pods, and final productivity. The highest average values of height of plant, root length and dry mass were obtained by applying nitrogen (N) from urea. The application of N and S as top dressing from ammonium sulfate brought an increase in productivity of 411 kg ha^-1, and a higher average weight of rapeseed grains. Applying ammonium sulfate proved to be more efficient, for it significantly influenced productivity and weight of grains.

Keywords:

Leaf fertilizer, oleaginous, renewable energy

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Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 1
Category: Agriculture
Pages: 516-518

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