POTASSIC FERTILIZATION FOR CRAMBE CROP
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Data
2014-06-01
Autores
Rosolem, Ciro Antonio [UNESP]
Steiner, Fabio [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Univ Federal Uberlandia
Resumo
There are few studies for the crambe crop (Crambe abyssinica Hochst), and studies that characterize the sufficiency level of K in the soil and leaves are indispensable to support future programs potassium fertilization for this crop of fall/winter. An experiment was carried out to investigate the response of crambe to K soil. The experiment was carried out on a clayey Red Latossol under no-till in Botucatu, S (a) over tildeo Paulo State, Brazil. Treatments consisted of seven K levels in the soil, resulting from the application year (2000 to 2010), the summer crop (soybean), 0, 30, 60, 90, 120, 150 and 180 kg ha(-1) K2O. Before starting the experiment, soil samples were collected at depths of 0-20 cm and soil K contents determined by the resin and Mehlich-1 method. The sufficiency levels of K in soil and leaves were obtained considering the relative yield of 90%. When the levels of soil K extracted by resin and Mehlich-1, are above 88 and 94 mg dm(-3), respectively, equivalent to 26 g kg(-1) K in the leaves, the increase in crop yield of crambe is unlikely. These values should match the sufficiency level of crop and are sufficient to achieve relative grain yield of 90%.
Descrição
Palavras-chave
Crambe abyssinica Hochst, Potassium availability, Foliar diagnosis, Critical levels
Como citar
Bioscience Journal. Uberlandia: Univ Federal Uberlandia, v. 30, n. 3, p. 140-146, 2014.