Crescimento de cultivares de arroz de sequeiro sob aplicação de doses de silicato de cálcio

Abstract

The use of silicon in agriculture, rice cultivation before sowing can be an alternative for manufacturers, since it may contribute to the development of culture, and participate directly in the plant compounds, which can you give added strength. With this, the objective was to monitor the growth of rice cultivars by applying calcium silicate doses as silicon source. The experiment was conducted in a greenhouse of the Institute of Agricultural Sciences (ICA) of the Federal Rural University of Amazonia (UFRA) in Belém-PA. The experimental design was completely randomized with four replications in a factorial 4 x 3, and the treatments were constituted the control treatment (without fertilizer with SiO2) SiO2 and three doses (150, 300, 450 kg ha-1) in the form of silicon silicate and three rice cultivars (BRS Monarch, BRS Pepita, BRS Tropical). The variables analyzed were: plant height and number of tillers per plant at 30 and 60 days after sowing. Regardless of the time of evaluation and cultivars used, the dosage that provided greater plant height was 300 kg ha-1 Si. When viewed the interaction of cultivars and doses greater height was to grow in Tropical highest dosage. In assessing the number of tillers to grow Tropical also excelled in both evaluation periods.