Methods and extractants to evaluate silicon availability for sugarcane

Autor(es)

Costa Crusciol, Carlos Alexandre ^[1] ; de Arruda, Dorival Pires ^[1] ; Fernandes, Adalton Mazetti ^[2] ; Antonangelo, Joao Arthur ^[3] ; Ferracciu Alleoni, Luis Reynaldo ^[4] ; Costa do Nascimento, Carlos Antonio ^[1] ; Rossato, Otavio Bagiotto ^[5] ; McCray, James Mabry ^[6]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Coll Agr Sci, Dept Crop Sci, Lageado Expt Farm, POB 237, BR-18610307 Botucatu, SP - Brazil

^[2] UNESP, Ctr Trop Tubers & Starches CERAT, Lageado Expt Farm, POB 237, BR-18610307 Botucatu, SP - Brazil

^[3] Oklahoma State Univ, Plant & Soil Sci Dept, Agr Hall, Stillwater, OK 74078 - USA

^[4] Univ Sao Paulo, Escola Super Agr Luiz Queiroz, Dept Soil Sci, POB 09, BR-13418900 Piracicaba, SP - Brazil

^[5] Inst Fed Catarinense, Campus Concordia, Rodovia SC 283, BR-89703720 Concordia, SC - Brazil

^[6] Univ Florida, Everglades Res & Educ Ctr, Belle Glade, FL 33430 - USA

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 8, JAN 17 2018.
• Citações Web of Science: 2

Resumo

The correct evaluation of silicon (Si) availability in different soil types is critical in defining the amount of Si to be supplied to crops. This study was carried out to evaluate two methods and five chemical Si extractants in clayey, sandy-loam, and sandy soils cultivated with sugarcane (Saccharum spp. hybrids). Soluble Si was extracted using two extraction methods (conventional and microwave oven) and five Si extractants (CaCl2, deionized water, KCl, Na-acetate buffer (pH 4.0), and acetic acid). No single method and/or extractant adequately estimated the Si availability in the soils. Conventional extraction with KCl was no more effective than other methods in evaluating Si availability; however, it had less variation in estimating soluble Si between soils with different textural classes. In the clayey and sandy soils, the Na-acetate buffer (pH 4.0) and acetic acid were effective in evaluating the Si availability in the soil regardless of the extraction methods. The extraction with acetic acid using the microwave oven, however, overestimated the Si availability. In the sandy-loam soil, extraction with deionized water using the microwave oven method was more effective in estimating the Si availability in the soil than the other extraction methods. (AU)

• Processo FAPESP: 10/16173-3 - Maturadores associados à aplicação de boro e silício via foliar em cana-de-açúcar
• Beneficiário: Carlos Alexandre Costa Crusciol
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular