Variation in Seed Yield and Quality Characters of Four Spring Oil Rapeseed Cultivars as Influenced by Population Arrangements and Densities

Abstract

Variations of yield and quality characters of four spring oilseed rape cultivars (B. napus L.) arranged in 16 or 32 cm between drills and under three population densities (30, 60 and 90 plants/nr) were investigated in a split‐plot design with three replications in 1986 and 1987 in West Germany. Cultivar Callypso gave the highest seed and oil yields per plot and the highest seed index, harvest index and seed yield/main stem, per branches and per plant. Differences due to arrangements were significant in 1986 only, i.e., the value of a special plant distribution was more pronounced under unsuitable weather condition (as in 1986). With respect to the three population densities, most of the characters showed significantly higher values with 30 plants/nr. Only seed yield and oil yield per plot that showed 7.27% and 5.6% increase, respectively, under the highest population density (90 plants/nr) but the differences were insignificant. The highest oil content was obtained from cultivar Callypso and from the lowest population density. By contrast, higher protein content was obvious under higher population densities and the differences from the lowest density were significant in both years. Differences in fatty acid composition were not significant for the three main effects.

Dependence of rapeseed quality and yield on density, variety and year of production

“…Correlation dependence of total protein content and density (r=-0.06) and genotype (r=0.09) was not confirmed by correlation analysis, while among total protein content and production year (r=-0.58*) a significant negative correlation ratio was obtained (Table 2). Our studies failed to confirm the influence of genotype on protein content determined by Marinković et al (2010), while Shrief et al (1990) determined higher protein content in seed obtained at higher density. Negative correlation ration between protein content and oil was determined by Hao et al (2004), which was confirmed by our investigation.…”

Sıra arası mesafelerinin kışlık kanola (Brassica napus L.)’da verim, verim unsurları ve yağ oranına etkisi

“…Morrison et al (1990); Leach et al (1999); Farsak (2009); Farsak and Kaynak (2010) indicated in their studies the oil ratio was not affected by inter-row spacing was consistent with our study results. Shrief et al (1990) found that the high density created high values in oil yield; Chauhan et al (1992) and Oad et al (2001) found that broad inter-row spaces created the highest oil ratio was incompatibility with our result results.…”

The effect of plant population densities on growth, yield and yield components of two spring rapeseed cultivars

“…This result concurs with the findings of Kondra (1977) and Van Deynze et al (1992), who reported that protein content did not change with varying plant densities. However, Shrief et al (1990) reported that protein content was higher under higher population densities.…”