Resumo

MIRALLES DE IMPERIAL HORNEDO, Rosario et al. Effect of the residual organic and mineral fertilizer on biological and agricultural yield, protein and oil content in the seeds of camelina plant (Camelina sativa). Rev. Int. Contam. Ambient [online]. 2015, vol.31, n.4, pp.377-387. ISSN 0188-4999.

Camelina (Camelina sativa (L.) Crantz) is an important crop for biofuel production and animal feed. A camelina cv. Calena culture experiment was carried out to test the effect of residual organic and mineral fertilization after a crop of winter rape oilseed (Brassica napus L.). The fertilization treatments applied to oilseed rape were two: thermal dry sewage sludge (TDSS) at rates 0 (r0) without fertilization, rate 1 (r1) that covers the nitrogen needs of the plant and rate 1.5 (r1.5), and alternatively mineral fertilizer (MF) N-P-K-S formula 15-15-15-20 at rates r0, r1 and r1.5. The camelina experiment was carried out in a greenhouse on the same pots of previous winter oilseed rape crop with the same soil and TDSS or MF. The variables analyzed were the following: dry weight (biological yield) of seed (SW), aerial biomass (ABW) and root biomass (RBW), percentage (%) of Kjeldhal Nitrogen (N) in: % NS, % NAB and % NRB. In order to determine the seed's quality, the variables studied were crude protein (% CPRS) and oil content (% OCS). The statistical study analyzed the variance of the chosen factors, namely treatment (TDSS and MF) and rates (0, 1 and 1.5). Treatment-rate interaction was no significant for all variables except ABW and SW (p ≤ 0.05).Treatment type only was significant in ABW, and rates were significant in all variables except RBW. As a result, this test with camelina crop showed a good response to residual fertilizer across the variables under analysis, with r1 and r1.5 for TDSS and r1 for MF. The highest % OCS values were obtained with r0, without fertilizer, while the highest % CPRS was obtained with r1.5 in both treatments (TDSS and MF).

Palavras-chave : aerial biomass; mineral fertilizer; root biomass; seed; thermal dry sewage sludge.