Artículos de revistas
Methods and extractants to evaluate silicon availability for sugarcane
Fecha
2018-12-01Registro en:
Scientific Reports, v. 8, n. 1, 2018.
2045-2322
10.1038/s41598-018-19240-1
2-s2.0-85040822514
2-s2.0-85040822514.pdf
6642173668831407
0000-0002-6745-0175
Autor
Universidade Estadual Paulista (Unesp)
Agricultural Hall
Universidade de São Paulo (USP)
Instituto Federal Catarinense
Everglades Research and Education Center
Institución
Resumen
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.