<b>Yield and production components of barley plant (<i>Hordeum vulgare</i>) in function of nitrogen fertilization</b>

Abstract

The experiment was conducted to evaluate the effect of increasing nitrogen levels on forage yield and components of barley plant (Hordeum vulgare). The treatments were: T1 – 0 kg ha-1 of N; T2 – 80 kg ha-1 of N; T3 – 100 kg ha-1 of N; T4 – 120 kg ha-1 of N; T5 – 150 kg ha-1 of N; T6 – 180 kg ha-1 of N and T7 – 220 kg ha-1 of N. No significant interaction (P>0.05) was observed between fertilization levels and evaluation period for variables for tiller m-2 number and dry matter content of barley plant. The regression equations for tiller m-2 number observed of 23 days (854.0752 + 2.1593N) and 45 (1020.7458 + 1.4729N) days after culture implantation showed linear behavior rising in 2.16 and 1.47, respectively for each kg of nitrogen applied. The regression equations for dry matter production observed of 23 days after culture implantation (720.0365 + 3.4388N) also to adjusted linear behavior rising in 3.44 kg ha for each kg of nitrogen applied. No difference (P>0.05) was observed for dry matter production observed 45 days after culture implantation in function of nitrogen fertilization. The culture implantation cost (R$ ha-1) showed linear behavior (181.9183 + 0.9842N), rising in R$ 0.98 for each kg of nitrogen applied.