Vol. 11, Special Issue 10 (2022)

Author(s):
S Samantaray, M Mahanty, A Priyadarshini, AKB Mohapatra, BS Rath and A Nanda

Abstract:
The experiment revealed that the rice transplanted earliest on 21 July took longer duration to achieve a particular phenological stage from sowing to maturity as compared to other dates of planting. The grain yield (4225 kg/ha), straw yield (4904 kg/ha) and harvest index (46.06%) , leaf area index (4.22) were recorded maximum in 5 August planting which were significantly at par with 21 July planting. Growing degree days and Photothermal units, were higher in 21 July planting but the Heliothermal units recorded highest in 5 August planting. The result of growth characters revealed that the total dry matter production, number of effective tillers/m², crop growth rate, leaf area index, grain yield, straw yield and harvest index were recorded maximum in variety Swarna which was significantly at par with the variety Hasanta. Swarna with grain yield of 4507.5 kg/ha was at par with Hasanta (4402.5 kg/ha) due to their long duration growth period and better RUE. The highest growing degree days ranged from 2357.8 to 2756.4 degree days in Hasanta variety. The Heliothermal units ranged from 11814.7 to 13214 degree day’s hours and Photothermal units ranged from 26960.8 to 33210.1degree days hours in Hasanta variety followed by Swarna. The Heliothermal units ranged from 11814.7 to 13214 degree day’s hours and Photothermal units ranged from 26960.8 to 33210.1 degree days hours in Hasanta variety followed by Swarna.