Silicon sources for rice crop
Hamilton Seron PereiraI, *; Gaspar Henrique KorndörferII; Anelisa de Aquino VidalIII; Mônica Sartori de CamargoII
- Campus Avançado de Jataí, Centro de Ciências Agrárias e Biológicas.
Rod BR 364, km 192, Zona Rural - 75800-000 - Jataí, GO - Brasil
IIUFU - Instituto de Ciências Agrárias, C.P. 593 - 38400-902 - Uberlândia, MG - Brasil
IIIUFU - Programa de Pós-Graduação em Agronomia
Open Access article from Sci. agric. (Piracicaba, Braz.) vol.61 no.5 Piracicaba Sept./Oct. 2004.
Although silicon is not an essential nutrient, its application is
beneficial for plant growth and development. To evaluate silicon
sources in relation to agronomic efficiency and economic viability in
rice crops (Oryza sativa L.), a greenhouse experiment was
conducted, Quartzipsamment soil, in a completely randomized
experimental design (n = 4). Treatments were 12 silicon sources and a
control. Silicon was applied at the rate of 125 kg Si ha-1.
Data were compared to a standard response curve for Si using the
standard source Wollastonite at rates of 0, 125, 250, 375, and 500 kg
Si ha-1. All treatments received CaCO3 and MgCO3
to balance pH, Ca and Mg. One hundred and fifty days after sowing,
evaluations on dry matter yield in the above-ground part of plants,
grain yield, and Si contents in the soil and plant tissues were
performed. Wollastonite had linear response, increasing silicon in the
soil and plants with increasing application rates. Differences between
silicon sources in relation to Si uptake were observed. Phosphate slag
provided the highest Si uptake, followed by Wollastonite and electric
furnace silicates which however, did not show differed among
themselves. The highest Si accumulation in grain was observed for
stainless steel, which significantly differed from the control,
silicate clay, Wollastonite, and AF2 (blast furnace of the company 2)
slag. Silicate clay showed the lowest Si accumulation in grain and did
not differ from the control, AF2 slag, AF1 slag, schist ash, schist,
and LD4 (furnace steel type LD of the company 4) slag.
Key words: slag, metallurgical aggregate, silicate, oryza