Effect of sowing dates and varieties on growth, yield and economics of aerobic rice (Oryza sativa L.) during Kharif season

Abstract

A field experiment was conducted duringtwo consecutive kharifseasons of 2012 and 2013 on clay soils of Agriculture Research Station, Madhira in Central Telangana Agro Climatic Zone of Telangana State, India to study the effect of different sowing dates on growth and yield of different duration rice varieties under aerobic environment. The results indicated that, the crop sown on 18thJunee produced more plant height, effective tillers and drymatter followed by 7thJulyy sown crop and decreasedsignificantly with every successive 15 days delay in sowing from 20thJulyy to 18thAugustust during both the years. The effective tillers, filled spikelets panicle-1 , grain and straw yield, net returns and B:C ratio were also significantly more with 18thJunee and 7thJulyy sown
crop when compared to subsequent dates sown crop. Among the varieties, the medium duration cv JGL 11470 and long duration cv MTU 1061 produced more plant height, drymatter, grainand straw yield, net returns and B:C ratio over short duration variety MTU 1010 and extra short duration variety JGL 17004.