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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(5): 435-448
DOI: https://doi.org/10.20546/ijcmas.2018.705.056


Dynamic Growth Pattern of Biophysical Parameters of Rapeseed-Mustard Cultivars under Different Thermal Environments and Row Orientation
Jagjeewan Singh, Som Pal Singh and P.K. Kingra
School of Climate Change and Agricultural Meteorology, Punjab Agricultural University, Ludhiana, Punjab, India
*Corresponding author
Abstract:

Although the growth rate of biophysical parameters can be strongly influenced by row orientation and temperature during different phenological stages in Rapeseed-Mustard cultivars but the dynamics of plant growth is not fully understood. Hence, a field experiment was conducted at the Research farm, School of Climate Change and Agricultural Meteorology, PAU, Ludhiana to characterize the dynamic growth pattern of biophysical parameters of three Brassica cultivars under different thermal environments and row orientation. The accumulation of dry matter partitioning and plant height was same in October 7 sown crop as compared to October 17 and October 27 sown crop. Early sown crop recorded significantly highest plant height (84.9 cm, 146.4 cm and 167.1 cm) during vegetative, flowering and pod filling stages respectively as compared to the late sown crop. Among the cultivars, PBR 357 accumulated highest dry matter and attained maximum plant height (176.5 cm) as compared to GSC 7 (165.2 cm) and PC 6 (152.8 cm) cultivars at maturity stage. The highest leaf area index was observed in early sown crop as leaf area index was reduced with delay in sowing. Crop growth rate was higher in October 7 (54.2 gm-2d-1) sown crop followed by October 17 (50.6 gm-2d-1) and October 27 (44.3 gm-2d-1) during pod filling stage. Among the cultivars, the growth rate of leaf dry matter was observed highest in PBR 357 followed by GSC 7 and PC 6 at vegetative and pod filling stages. The Relative growth rate increased throughout life cycle of crop rather than CGR was decreased after 100 of sowing. The leaf area ratio and specific leaf area were highest in PC 6 as compared to PBR 357 and GSC 7 but the leaf weight ratio and specific leaf weight observed highest in PBR 357 followed by PC 6 and GSC 7. No effect of row orientation was observed in dry matter accumulation, plant height and crop growth rate. The study concluded that alteration in sowing time is highly effective for better growth of biophysical parameters of Rapeseed-mustard cultivars and thus, can be used as adaptation strategy to manage high temperature effects under changing climatic scenarios.


Keywords: Crop growth rate, Dry matter, Leaf area ratio, Leaf weight ratio, Plant height, Rapeseed-Mustard, Relative growth rate, Specific leaf area
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How to cite this article:

Jagjeewan Singh, Som Pal Singh and Kingra, P.K. 2018. Dynamic Growth Pattern of Biophysical Parameters of Rapeseed-Mustard Cultivars under Different Thermal Environments and Row Orientation.Int.J.Curr.Microbiol.App.Sci. 7(5): 435-448. doi: https://doi.org/10.20546/ijcmas.2018.705.056