Effect of Thermal Unit and Heat use Efficiency at various Phenophases of Chickpea (Cicer arietinum L.) Cultivars

Author: Mandeep Kumar, Naushad Khan, Ravindra Sachan, Shravan Kumar Maurya and Durgesh Kumar Maurya

Download PDF

Abstract

During the Rabi season of 2019–20, a field experiment was conducted on the sandy loam soil at the C.S.A. University of Agriculture and Technology in Kanpur, Uttar Pradesh, India. At various phenological stages, the diverse climatic conditions that are created by various sowing dates have a significant impact on accumulated thermal unit and heat use efficiency. Temperature stands out as one of the main contributors to the behaviour’s fluctuations throughout time and space. The effects of temperature on chickpea cultivars (KWR-108, KPG-59 and KGD-1168) phenology and heat use efficiency grown was evaluated in a trial with a split plot design (SPD) with 4 replications, where sowing dates were November 10, November 20, and November 30 (year 2019). At various phenophases, there was a tremendous discrepancy in the cumulative growth degree days/heat unit; the heliothermal unit and photothermal unit were impacted by the variable sowing date/sowing temperature. higher heat unit/growing degree days. When chickpea cultivar KGD-1168 was sowed on November 10 (at a temperature of 22°C), followed by a crop on November 20 (at a temperature of 17°C), heliothermal and photothermal units were detected at all phenological phases, particularly given that they took the longest to mature. Heat use efficiency (HUE) enhanced inside the crop when it was sown on November 10 at a temperature of 22°C, followed by variety KGD-1168 on November 20 at a temperature of 17°C, and it decreased on November 30. This showed that the crop exposed a suboptimal thermal regime as a result of the delayed sowing (with sowing temperature 16°C).

Keywords

Chickpea, Growing Degree Days, Heliothermal Unit, November, Phenological Stages, Photothermal Unit and Temperature

Conclusion

The present study concluded that sowing of chickpea variety KGD-1168 on November.10 are exhibited significantly highest accumulated GDD 1931.47°days. Heliothermal Unit 158612.03° days h and photothermal. Unit 20401.42° days h from various reproductive stages of chickpea under prevailing weather condition of central plain zone of Uttar Pradesh. Maximum heat use efficiency was recorded under KGD-1168 sown on November 10.

References

-

How to cite this article

Mandeep Kumar, Naushad Khan, Ravindra Sachan, Shravan Kumar Maurya and Durgesh Kumar Maurya (2023). Effect of Thermal Unit and Heat use Efficiency at various Phenophases of Chickpea (Cicer arietinum L.) Cultivars. Biological Forum – An International Journal, 15(3): 583-588.