Yield and nitrogen use efficiency of bell pepper grown in SLAB fertigated with different nitrogen rates |
| |
Authors: | Jose Maria da Silva Paulo Cezar Rezende Fontes Carla do Carmo Milagres July Anne Amaral de Abreu |
| |
Institution: | 1. Department of Agronomy, Federal University of Vi?osa, Vi?osa, Brazil jose.m.maria@ufv.br;3. Department of Agronomy, Federal University of Vi?osa, Vi?osa, Brazil |
| |
Abstract: | Abstract Adequate plant nutrition is important to reduce costs and increase the crop yield. This study tried to verify the influence of Nitrogen (N) on plant biomass production and the yield of bell pepper grown in SLAB; quantify the N use efficiency (NUE), and to quantify the residual N concentration in the substrate after the end of the crop cycle. The experiment was carried out in a protected environment. Pepper seedlings were transplanted to SLAB bags containing 40?dm3 of substrate. The treatments consisted of six N rates (0, 1.5, 3.0, 4.5, 6.0, and 7.5?g plant?1) split into 10 fortnightly applications, in a randomized block design with four replications. The fruit yield was evaluated throughout the experiment and after the final harvest, the dry mass of leaves, stem, and root of the plant, the N content and accumulated, the residual nitrate and ammonium in the substrate, and the NUE were evaluated. The rate of 5.51?g plant?1 of N, corresponding to 355.5?kg ha?1, provided the maximum yield of commercial fruits of 1.57?kg plant?1 or 101.2 t ha?1. With increasing N rate, the residual nitrate concentration in the substrate increased and the NUE decreased. |
| |
Keywords: | bag culture Capsicum annuum L greenhouse lay flat bag nitrate |
|
|