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Subject: Agricultural Meteorology × Author: Lovedeep Singh × End date: 2021 × Start date: 2021 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Productivity of rapeseed and mustard (Brassica spp. L.) genotypes as influenced by microclimate and growth alterations
    (Punjab Agricultural University, Ludhiana, 2021) Lovedeep Singh; Gill, Kulwinder Kaur
    The investigation entitled “Productivity of rapeseed and mustard (Brassica spp. L.) genotypes as influenced by microclimate and growth alterations” was carried out at Research farm of Department of Climate Change and Agricultural Meteorology, Punjab Agricultural University, Ludhiana. The field experiment was performed during the rabi season of 2019-20 in split plot design keeping four cultivars: Giriraj, RLC-3, GSC-7 and GSC-6, three planting methods i.e. uni-directional (E-W), uni-directional (N-S) and bidirectional (E-W, N-S) in main plots with two growth alterations viz. detopping and no detopping in sub-plots, replicated three times. Among all the cultivars, significantly highest grain yield (22.61 q/ha) and oil content (40.64 %) was observed for giriraj cultivar (V1). The plant height, dry matter accumulation, biological yield, straw yield, grain yield and yield attributing characters were significantly higher under bi-directional (P3) sowing of the crop. Among growth alterations, detopping treatment resulted in higher plant height, dry matter accumulation, biological yield, straw yield, grain yield and all yield attributing characters except number of primary branches per plant than no detopping treatment. The rapeseed and mustard crop grown under bi-directional sowing recorded increased grain yield by 14.62 % and 14.09 % over uni-directional (E-W) and uni-directional (N-S) sowing, respectively. Similarly, the oil content under bi-directional sowing was higher by 3.54 % and 1.28 % over uni-directional (N-S) and uni-directional (E-W) sowing, respectively. Among growth alterations, crop under detopping treatment recorded significantly higher grain yield (19.29 q/ha) than no detopping treatment (18.29 q/ha) which showed 5.46% increase in yield under detopping treatment. Higher oil content was observed in detopping treatment (39.55 %) in comparison to no detopping treatment (38.07 %).