INFLUENCE OF DIFFERENT TEMPERATURE REGIMES ON GROWTH AND YIELD OF RICE

K. BARDHAN¹*, D.P. PATEL², H.S. THAKARE³, P.K. SHRIVASTAVA^4
1ASPEE College of Horticulture and Forestry, Navsari Agricultural University, Navsari - 396 450, Gujarat, India.
²ASPEE College of Horticulture and Forestry, Navsari Agricultural University, Navsari - 396 450, Gujarat, India.
³ASPEE College of Horticulture and Forestry, Navsari Agricultural University, Navsari - 396 450, Gujarat, India.
⁴ASPEE College of Horticulture and Forestry, Navsari Agricultural University, Navsari - 396 450, Gujarat, India.
* Corresponding Author : kirtivardhan@nau.in

Received : 08-07-2015     Accepted : 05-08-2015     Published : 10-08-2015
Volume : 7     Issue : 4       Pages : 502 - 509
Int J Agr Sci 7.4 (2015):502-509

Keywords : Day and Night temperature, Growth, Rice, Temperature regimes, Yield
Academic Editor : Ramaraj A.P., Tanveer Hasan, Patel A.I., Dr. Dileshwar Nayak, Prakash Jyoti, Verma P N
Conflict of Interest : None declared

The predicted 2-4°C increment in temperature by the end of the 21st Century poses a threat to rice production and it is projected that world rice production must increase by 1% annually to meet the growing demand for food that will result from population growth and economic development despite of the world's temperature increases, so an effort has been made to understand the influence of different temperature regimes on growth and yield of rice for development of suitable genotypes for predicted temperature. The present investigation was undertaken in the polycarbonate house at the Research Farm, Navsari Agricultural University, Navsari, Gujarat (India) in summer 2010-11 and kharif 2011-12. Fifteen treatments, consisting of three most prevalent variety of the region viz. Jaya, Gurjari and GNR-2, and five temperature treatments regimes viz. 10 years average temperature, 5% above of 10 years average temperature, 10% above of 10 years average temperature, 5% below of 10 years average temperature and ambient temperature - open field condition, were imposed in the experiment on the basis of 10 years average fortnightly diurnal temperature during the whole crop growing season. The results showed that higher temperature regimes (5% and 10% increase over 10 years average) significantly reduced the grain yield of rice in all three varieties viz. Jaya, Gurjari and GNR-2. The yield reduction was up to the tune of 18% and 36.6% when rice crop experienced rise of only 1.3°C and 2.7°C respectively, in average daily temperature above 10 years of average temperature (Max.: 32.1°C and Min.: 21.6°C).