Effects of Nitrogen and Sulphur Fertilizers on Yield, Yield Components and Oil Content of Oilseed Rape (Brassica napus L.)

摘要

Present experiment was carried out to investigate the influence of nitrogen (150 and 300 kg ha ') and sulphur (0,100 and 200 kg ha~(-1)) fertilizers on yield, yield components and oil content of two cultivars of oilseed rape (Brassica napus L.), Hyola308 and PF7045. The experiment was factorial, laid out in Randomized Block Design with three replicates. Biological and economical yield were significantly different between cultivars. The higher grain weight of Hyola 308 was due to bigger size of podsand heavier seed weight. Application of nitrogen did affect biological yield positively but it did not affect grain weight. The increase in dry matter production or biological yield was 14% when the amount of nitrogen fertilizer increased from 150 to 300kg ha~(-1). Sulphur application affected neither dry matter production nor grain weight. Two cultivars were significantly different for oil contents. Nitrogen affected the oil content negatively and decreased it by 3.3%. Increasing the amount of sulphurfertilizer from zero to 200 kg ha~(-1) resulted in an increase in oil content.