Effectiveness of n and S fertilization at different rates on growth, seed yield and quality of canola
Abstract: A field experiment was conducted on a sandy soil at Ismailia Agric. Res. Station, Egypt to determine a proper fertilizer N:S ratio by using four combination rates of both N (0, 30, 60 and 90 kg N/fed) and S (0, 125, 250 and 500 kg S/fed) for maximizing dry matter yield at flowering, seed yield, yield components and seed quality of canola (Pactol variety). Nitrogen and sulphur concentrations as well as N:S ratio were measured in canola tissue at flowering stage. The obtained data indicated that the applied different rates of N and S fertilizers display an effective role on dry matter yield at flowering, seed yield and seed quality. Sulphur application showed significant increases for dry weight of whole plant, seed yield and yield components (number of pods/plant, number of seed/pod and 1000 seeds weight) with increasing S rates up to 250 kg/fed. However, higher rate of S showed insignificant effect. Also, nitrogen application showed more pronounced increases for dry weight of whole plant, seed yield and yield components, when compared with sulphur application alone. At the same time, the combined applications were significantly higher for seed yield and yield components as compared to the individual ones, with superiority at the treatment of 60 kg n/fed and 250 kg S/fed. Tissues concentration of N and S was increased above that of the control treatments as a result of S application, but the reverse was true for S tissue concentration with increasing N rates. The optimum N:S ratio in the plant tissues for maximizing dry matter of canola was 12.5 g/plant under 60 kg N/fed and 250 kg S/fed, indicating an adequate N:S ratio for canola production. The N:S ratio was more related to the plant dry weight at early flowering stage. As for seed quality parameters of canola, it was found that a significant interaction between S and N on protein and glucosinolate contents in the seeds. Whereby increasing the N supply increased protein content and decreased seed glucosinolate concentration in the absence of S. Meanwhile, increasing both protein and glucosinolates contents in the seed. Moreover, a significant increase in oil seed content was observed as a result of successive additions of S.
Publication year 2004
Pages 360-374
Availability location The Egyptian Society of Applied Sciences
Availability number
Organization Name
City Zagazig
serial title Egyptian Journal of Applied Sciences
ISSN 1110-1571
Department Sandy and Calcareous Soils Research
Author(s) from ARC
Agris Categories Soil erosion, conservation and reclamationSoil fertility
AGROVOC
TERMS		 Brassica napus. Sandy soils.
Proposed Agrovoc Nitrogen fertilization;sulphur fertilization;
Publication Type Journal
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