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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 (2017)
[Effective from January 1, 2017]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(11): 141-147
DOI: https://doi.org/10.20546/ijcmas.2018.711.018


Yield and Nutrient Losses Due to Weeds in Prominent Cropping Sequences under Mid Hills of Himachal Pradesh
Gurpreet Singh, Pawan Pathania, S.C. Negi and S.S. Rana
Department of Agronomy, Forages and Grassland Management, COA, CSK Himachal Pradesh Himachal Pradesh Agricultural University, Palampur-176 062, India
*Corresponding author
Abstract:

The present study was carried out in a continuing experiment at the Bhadiarkhar farm of the CSK HPKV. Eight cropping sequences [C1- ‘rice – wheat’, C2- ‘rice – pea – summer squash’, C3- ‘okra – radish – onion’, C4- ‘turmeric – pea – summer squash’, C5- ‘rice – lettuce – potato’, C6- ‘rice – palak – cucumber’, C7- ‘rice – broccoli – radish’, C8- ‘colocasia – pea + coriander’] were evaluated during 2016-17. There were 24 weed species which invaded different cropping systems. During kharif, Ageratum sp. (28%), Cynodon dactylon (20%) and Commelina benghalensis (19%) were the predominant weeds. In rabi, Phalarisminor (63%) was the most dominating weed followed by Coronopus didymus (10%) and Spergulla arvensis (6%). In kharif, weed flora was more diverse in C3, C4 and C8 i.e. okra, turmeric and colocasia based sequences, respectively and weed diversity was lower in rice-based sequences. In rabi, highest diversity of weed species was in rice-wheat sequence.C8 had highest RGEY among all the crop sequences. Weeds inflicted huge yield losses ranging from 30.6 in C1 to 59.2% in C6. N depletion by weeds ranged from 16.2 in C6 to 48.5 kg/ha/annum in C3, P from 3.1 in C5 to 8.1 kg/ha/annum in C3 and K from 4.8 in C6 to 13.2 kg/ha/annum in C3.


Keywords: Cropping systems, Weed diversity, Nutrient losses, Yield losses
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How to cite this article:

Gurpreet Singh, Pawan Pathania, S.C. Negi and Rana, S.S. 2018. Yield and Nutrient Losses Due to Weeds in Prominent Cropping Sequences under Mid Hills of Himachal Pradesh.Int.J.Curr.Microbiol.App.Sci. 7(11): 141-147. doi: https://doi.org/10.20546/ijcmas.2018.711.018