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Current IssueEditorial BoardOnline First ArticlesArchive

volume 34 issue 1 (march 2000) : 23-28

ENERGY INDICES AND PHENOPHASE DEVELOPMENT IN BRASSICA: EVALUATION OF VARIOUS ENERGY INDICES IN RELATION TO PHENOPHASE DEVELOPMENT OF BRASSICA SPECIES

D
Diwan Singh
V
V.U.M. Rao. Raj Singh
O
O.P. Bishnoi
1Department of Agricultural Meteorology CCS Haryana Agricultural University, Hisar-125 004, India

  • Submitted|

  • First Online |

  • doi

Cite article:- Singh Diwan, Singh Raj Rao. V.U.M., Bishnoi O.P. (2025). ENERGY INDICES AND PHENOPHASE DEVELOPMENT IN BRASSICA: EVALUATION OF VARIOUS ENERGY INDICES IN RELATION TO PHENOPHASE DEVELOPMENT OF BRASSICA SPECIES. Indian Journal of Agricultural Research. 34(1): 23-28. doi: .

ABSTRACT

The ability of six different energy Indices based on radiation, thermal units, pan evaporation and potential evapotranspiration to predict phenophase development of three Brassica species grown at Hisar over three years was studied. The Indices were accumulated over various growth stages; sowing to vegetative, sowing to bolting, sowing to termination of flowering on main shoot and sowing to maturity in three species. When photosynthetically active radiation was summed over the period between sowing to termination of flowering on main shoot, it generally proved to be better index to predict phenophase development than the rest of the indices. The comparison of the coefficient of variation computed for all six indices over whole crop season (sowing to maturity) showed little variation. However, the index based on photosynthetically active radiation (PAR) when considered for entire crop season proved best over other indices and yielded least variation indicating Its better applicability

KEYWORDS

    REFERENCES

    1. Bishnoi, a.p., et al., (1987). In: "Proc. National Seminar on Agrometerology of Plantation
    2. Crops" (Eds G.S.L.H.V.P. Rao & R.R. Nair) Kerala Agricultural University, Pilicode,India
    3. pp.15-17.
    4. Fitzpatrick, E.A. & Nix, H.A.(1969). AgriJ. Meteorology 6: 303-319.
    5. Fritz,S. and Macdonald, T.H.(1949). Heating and ventila'.ug 1 6: 61-64.
    6. Major, D.J. and Hamilton, R.I.(1978). Canadian J. PI. Sci. 58: 643-65.
    7. Monteith, J.L. (1973). Principles of Environmental physics. Edward Arnold, London.
    8. Monteotj, J.L. (1977). Philosophical Trans. Royal Soc. of London Ser. B 281: 277-294.
    9. Nuttonson, M. Y. (1955). Wheat-climate relationships and use of phenology in ascertaining the
    10. thermal and photothermal requirement of wheat. American institute of crop Ecology,
    11. 54-55.
    12. Penman, H.L. (1948). Proc. Royal Soc. (London), Ser. A. 193: 120-145.
    13. Sastry, P.S.N. and Chakravarty, N.V.K. (1982). Agril. Meteoro. 27: 45-4::\.
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    Indian Journal of Agricultural Research
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      volume 34 issue 1 (march 2000) : 23-28

      ENERGY INDICES AND PHENOPHASE DEVELOPMENT IN BRASSICA: EVALUATION OF VARIOUS ENERGY INDICES IN RELATION TO PHENOPHASE DEVELOPMENT OF BRASSICA SPECIES

      D
      Diwan Singh
      V
      V.U.M. Rao. Raj Singh
      O
      O.P. Bishnoi
      1Department of Agricultural Meteorology CCS Haryana Agricultural University, Hisar-125 004, India

      • Submitted|

      • First Online |

      • doi

      Cite article:- Singh Diwan, Singh Raj Rao. V.U.M., Bishnoi O.P. (2025). ENERGY INDICES AND PHENOPHASE DEVELOPMENT IN BRASSICA: EVALUATION OF VARIOUS ENERGY INDICES IN RELATION TO PHENOPHASE DEVELOPMENT OF BRASSICA SPECIES. Indian Journal of Agricultural Research. 34(1): 23-28. doi: .

      ABSTRACT

      The ability of six different energy Indices based on radiation, thermal units, pan evaporation and potential evapotranspiration to predict phenophase development of three Brassica species grown at Hisar over three years was studied. The Indices were accumulated over various growth stages; sowing to vegetative, sowing to bolting, sowing to termination of flowering on main shoot and sowing to maturity in three species. When photosynthetically active radiation was summed over the period between sowing to termination of flowering on main shoot, it generally proved to be better index to predict phenophase development than the rest of the indices. The comparison of the coefficient of variation computed for all six indices over whole crop season (sowing to maturity) showed little variation. However, the index based on photosynthetically active radiation (PAR) when considered for entire crop season proved best over other indices and yielded least variation indicating Its better applicability

      KEYWORDS

        REFERENCES

        1. Bishnoi, a.p., et al., (1987). In: "Proc. National Seminar on Agrometerology of Plantation
        2. Crops" (Eds G.S.L.H.V.P. Rao & R.R. Nair) Kerala Agricultural University, Pilicode,India
        3. pp.15-17.
        4. Fitzpatrick, E.A. & Nix, H.A.(1969). AgriJ. Meteorology 6: 303-319.
        5. Fritz,S. and Macdonald, T.H.(1949). Heating and ventila'.ug 1 6: 61-64.
        6. Major, D.J. and Hamilton, R.I.(1978). Canadian J. PI. Sci. 58: 643-65.
        7. Monteith, J.L. (1973). Principles of Environmental physics. Edward Arnold, London.
        8. Monteotj, J.L. (1977). Philosophical Trans. Royal Soc. of London Ser. B 281: 277-294.
        9. Nuttonson, M. Y. (1955). Wheat-climate relationships and use of phenology in ascertaining the
        10. thermal and photothermal requirement of wheat. American institute of crop Ecology,
        11. 54-55.
        12. Penman, H.L. (1948). Proc. Royal Soc. (London), Ser. A. 193: 120-145.
        13. Sastry, P.S.N. and Chakravarty, N.V.K. (1982). Agril. Meteoro. 27: 45-4::\.
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