Sulfur doses, organic compost and gypsum in macronutrients contents of collard greens leaves

Due to the lack of information related to fertilization of collard greens, the objective of the research was to evaluate the influence of sulfur doses in macronutrients contents in collard greens cultivated with organic compost and gypsum. Twelve treatments were evaluated in a split-plot: three type...

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Bibliographic Details
Published in:Comunicata Scientiae 2020-01, Vol.11, p.1-5
Main Authors: Nasser, Mauricio Dominguez, Cardoso, Antonio Ismael Inácio, Correa, Carla Verônica
Format: Article
Language:English
Subjects:
Agricultural production
Ammonium
Ammonium compounds
Ammonium sulfate
Biological fertilization
Calcium
Composting
Composts
Dry matter
Fertilization
Fertilizers
Gypsum
Leaves
Magnesium
Nitrogen
Nutrients
Nutrition
Potassium
Soil
Soil types
Soils
Standardization
Sulfur
Sulfur content
Sulphur
Urea
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Summary:Due to the lack of information related to fertilization of collard greens, the objective of the research was to evaluate the influence of sulfur doses in macronutrients contents in collard greens cultivated with organic compost and gypsum. Twelve treatments were evaluated in a split-plot: three types of soil preparation in plots and four sulfur doses top dressing in subplots. The three types of soil preparation were the incorporation of organic compost (30 t ha-1); gypsum (1.2 t ha-1); organic compost (30 t ha-1) plus gypsum (1.2 t ha-1). The total sulfur doses in top dressing were zero; 53.32; 106.68 and 160.00 kg ha-1 of S, equivalent to 0; 266; 532 and 800.0 kg ha-1of ammonium sulfate. For standardization of the nitrogen dose (280 kg·ha-1), applied in top dressing it was used urea. From the dry matter of commercial leaves, it was evaluated the N, P, K, Ca, Mg and S contents. The types of soil preparation do not affect all macronutrients content. The sulfur top dressing applied does not alter the contents of leaf macronutrients N, P, K and Ca on collard greens cultivated with organic compost and gypsum. The sulfur content presents a linear increase, while for the magnesium content there is decrease the higher the sulfur doses. The decreasing order of macronutrient content of commercial collard greens leaves was K> N> Ca> Mg> S> P, with averages 37.92, 36.50, 21.69, 4.50, 4.23, 3.80 g kg-1, respectively.
ISSN:2179-9079
2177-5133
DOI:10.14295/CS.v11i0.3352