Gypsum as a source of sulfur for strawberry crops
Ligia Souza Silva, Mariade Cássia Piccolo, MarisaRicardo Trevizam, Anderson
There are several studies on plant responses to Sulfur (S), but few are specific to the strawberry crop. The requirement for nutrients and the nutritional status of plants is a particular attribute of each species that should be taken into account when determining the plants nutritional demand. The objective of this study was to evaluate the application of S and phosphate (P) rates in the development and productivity of strawberry crops. An experiment was conducted in a greenhouse in pots containing 2 kg soil (Oxisol) in Guarapuava city of Paraná State. The experiment consisted of a 6 × 2 factorial outlined in a randomized block design with three replications, with six doses of S: 0, 10, 20, 30, 40 and 50 mg kg-1 in the form of gypsum, and two doses of P: 300 and 600 mg kg-1 of P2O5. The Albion variety of strawberry plants was transplanted to pots and grown for 170 days. The fruits were harvested and weighed throughout the experiment; a similar procedure was followed for the shoots at the end of the experiment. The shoots and fruits were dried, weighed, ground, and analyzed for the content of S, Ca, and P. The production of strawberry fruits was influenced by S rates, with the highest productivity obtained by using S rates of 60 and 37 mg kg-1 with the application of 300 and 600 mg kg-1 of P, respectively.
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