Influence of combined nitrogen and sulphur fertilization on false flax (<i>Camelina sativa</i> [L.] Crtz.) yield and quality
2010
Lošák, T. | Vollmann, J. | Hlušek, J. | Peterka, J. | Filipčík, R. | Prášková, L.
The influence of joint applications of N and S on false flax (<i>Camelina sativa</i> L.) growing was studied in a pot experiment. Nitrogen was applied as NH<sub>4</sub>NO<sub>3</sub> at rates of 0.6 (N<sub>1</sub>)–0.9 (N<sub>2</sub>)–1.2 (N<sub>3</sub>) g per pot. Sulphur was applied as (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> to achieve levels of 35 ppm (S<sub>1</sub>) and 55 ppm (S<sub>2</sub>) S-SO <sub>4</sub><sup>2−</sup> . The number of branches per plant increased with the nitrogen doses (10.62–12.41–15.38). The N<sub>2</sub> and N<sub>3</sub> rates (4.91 g and 4.79 g, respectively) significantly increased the seed yields (g/plant) as compared to N<sub>1</sub> (3.77 g). Straw yields (g/plant) and thousand-seed weight (g) increased significantly only with the highest level of nitrogen N<sub>3</sub> (18.23 and 1.17, respectively) compared to N<sub>1</sub> (16.52 and 1.06, respectively). Increasing levels of nitrogen (N<sub>1</sub>–N<sub>2</sub>–N<sub>3</sub>) reduced the oil content of seeds (40.79–38.40–37.66%), but increased the protein content (23.93–25.63–28.19%). The level of sulphur S<sub>2</sub> significantly stimulated only the oil content to 39.36% compared to 38.54% with S<sub>1</sub>. At the same time a negative correlation was discovered between the oil and protein content in the seeds (r= −0.8164). The applied doses of nitrogen N<sub>2</sub> and N<sub>3</sub> significantly increased the total oil yields (1.88–1.80 g/plant) as well as the total protein yields (1.25–1.35 g/plant) compared to N<sub>1</sub> (1.53 and 0.90 g/plant, respectively).
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