Paper Details

Study on effect of plant density variations at different growth stages of rapeseed on seed yield, oil yield, seed oil content

Mohammad Javad  Jazinizadeh, Saeed Sadeghzadeh Hemayati, Nader Dari jani, Fatemeh Jazinizadeh

DOI: https://dx.doi.org/10.12692/ijb/4.8.209-214

Int. J. Biosci. 4(8), 209-214. April, 2014. (PDF)

Abstract:

The effect of Study on effect of plant density variations at different growth stages of rapeseed on seed yield , oil yield, seed oil content was investigated in Natural Resources Nursery of Bam, Iran in 2010-2011 as a factorial study based on a Randomized Complete Block Design with three replications in which the first factor was devoted to the time of plants removal including seedling emergence, stemming and flowering and the second factor was devoted to the intensity of plants removal at three levels of 25, 50 and 75%. There was a control in each replication. The measured traits included seed yield, oil yield, seed oil content, Harvest index. It was found that rapeseed is more sensitive to the intensity of plants removal than to its stage. The effect of plants removal intensity was significant on seed yield per plant and oil yield per unit area at 5% probability level and on total yield per unit area at 1% probability level, so that the removal of 25 and 50% of plants was compensated by greater growth and single-plant yield (by 34.2%) and only the removal of 75% of plants decreased seed yield per unit area by 30.7 and 19.9% as compared to the removal of 25 and 50% of plants, respectively. The interactions between the time and intensity of plants removal was significant for oil yield and seed yield at 5% probability level. The lowest seed yield (2668 kg ha-1) was obtained by the removal of the plants at flowering and stemming which differed with control by 26.34%. Other evaluated traits were not affected by the treatments. It can be recommended that the maximum seed yield can be realized in Bam, Iran by decreasing plant density by 15% (57 plants m-2).