Effect of Sowing Dates, Seeding Rates on Growth, Yield and its Component of Some Rapeseed (Brassica nupus L.) Genotypes.*

  • Jwan Jawdat Hashim College of Agricultural Engineering Science-Salahaddin University-Erbil
  • Bahar Jalal Mahmood College of Agricultural Engineering Science-Salahaddin University-Erbil
Keywords: Rapeseed genotypes, Sowing dates, Seeding rates, , Growth and yield parameter.

Abstract

     This study was conducted at Grdarasha Research Field / College of Agricultural Engineering Sciences - Salahaddin University - Erbil during the winter growing season (2014-2015), to investigate the effect of sowing dates, seeding rates on growth parameters, yield and its  component of different rapeseed genotypes .  A factorial experiment based on Randomized Complete Block Design (RCBD), with three replicates was applied, the first factor included three genotypes (Pactol, Raja and Rendy), the second factor included three sowing dates (15th October, 31st October, and 15th November), while the third factor represented two seeding rates (4 and 6 kg ha -1).The results indicated that the  sowing on 15th October was superior and gave highest rate of leaf area (1986.34 cm 2), dry matter weight (23.86 g plant -1), plant height (208.63 cm), number of primary branches (8.05), number of secondary branch (5.75), stem diameter (11.04 mm), number of siliques plant -1 (218.75), number of seeds silique -1 (21.95), weight of thousand seeds (3.31 g), seed yield (3.39Mg ha -1). Increasing seeding rate from 4 to 6 kg ha -1 caused reduction in all growth characteristics of Rapeseed genotypes except plant height. While Pactol genotype obtained the highest seed yield (4.49 Mg ha -1) when sown on 15th October with seeding rate of 4 kg ha -1.

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References

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Published
2021-03-15
How to Cite
Jawdat Hashim, J. and Jalal Mahmood, B. (2021) “Effect of Sowing Dates, Seeding Rates on Growth, Yield and its Component of Some Rapeseed (Brassica nupus L.) Genotypes.*”, Zanco Journal of Pure and Applied Sciences, 33(s1), pp. 160-174. doi: 10.21271/ZJPAS.33.s1.17.