Silicon (Si) is not considered an essential element for plant growth and development. However, in many agricultural soils, are deficient in plant-available Si, making Si supplementation necessary. We assessed the effect of silicon and nitrogen fertilization on the water use efficiency (WUE) of sugarcane, planted on a soil classified as Typic Hapludox (Eutrophic Red Latosol in Brazil), the plants were grown within 11 L pots in greenhouse at the Department of Biosystems Engineering, ESALQ/USP, Brazil. The experimental design was completely randomized with 4 blocks with 8 treatments in a factorial scheme (2 x 3)+ 2, made up by two levels of nitrogen (N) (0,6 and 0,9 g pot -1 ) and three levels of Si (5, 10 and 15 g pot -1 ). The results were submitted to analysis of variance by the Test F and the differences between the treatments were compared by at 5% of significance. Our results indicate that high levels of N combined with Si do not improve the efficiency of water use in sugarcane.KEYWORDS: ammonium, cement, sugarcane.
EFEITO DO NITROGÊNIO E DO SILÍCIO SOBRE
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