Contribution of climatic variables in predicting rice yield

✍ Scribed by A.K. Samsul Huda; B.P. Ghildyal; V.S. Tomar; R.C. Jain

• Book ID: 102980231
• Publisher: Elsevier Science
• Year: 1975
• Weight: 668 KB
• Volume: 15
• Category: Article
• ISSN: 0002-1571
• DOI: 10.1016/0002-1571(75)90019-9

✦ Synopsis

An attempt was made to understand how the intensity and distribution pattern of weather parameters at different stages of growth affect the rice yield. The second-degree multiple-regression equation can profitably be employed in quantifying the relationship between rice yield and weather variables.

The results show that the crop reacts differently to climatic parameters during different stages of development. The resultant response is manifested in the final yield. Above average weekly total rainfall is beneficial during the nursery period. The vegetative phase coincides with the heavy-rain period on account of the onset of the monsoon and therefore any increase in weekly total rainfall more than the average has the adverse effect. The ripening phase is the most susceptible to excess rainfall. Above average maximum and minimum daily temperature have beneficial effect during the nursery period. A change of +I°C of maximum daily temperature from the average value has slight effect during the later part of the nursery, the early active vegetative stage and the later part of the ripening period. The lag vegetative to early reproductive phase is most susceptible to maximum daily temperature. The later part of the nursery period and the early active vegetative phase are slightly affected by a change of -+1°C minimum daily temperature from the average. A change of -+1% of maximum and minimum daily relative humidity from the average during the nursery period slightly affects the yield. The reproductive and ripening phases are susceptible to a change of +1% maximum and minimum daily relative humidity and also to a change of +I°C minimum daily temperature from their corresponding averages.