Abstract

A field experiment was conducted at Hyderabad during kharif 2014 to study the “Water management for different methods of rice (Oryza sativa L.) cultivation in puddled soils”. The treatments comprises of three systems of cultivations (direct seeding with drum seeder(DS), transplanting with machine (MTP) and conventional transplanting(CTP) as main treatments and sub treatments with four irrigation regimes i.e ,irrigation of 5 cm, when water level falls below 5 cm from soil surface in field water tube (I1), irrigation of 5 cm, when water level falls below 10 cm from soil surface in field water tube (I2), irrigation of 5 cm at 3 days after disappearance of ponded water (I3), and recommended submergence of 2-5 cm water level as per crop stage (I4). Significantly higher number of tillers m-2 were observed in MTP over DS at all growth stages except 50 DAS. Number of tillers in MTP at 110 DAS and at harvest was on par with CTP. Significantly lower root volume was observed in DS (CTP and at harvest, respectively) than rest of methods of crop establishment at 110 DAS and harvest and was on par with CTP at 80 DAS. However, CTP was on par with MTP at 80 DAS and at harvest, but significantly differed at 110 DAS. Among different irrigation regimes significantly higher number of tillers m-2 was recorded with I4 over I2 and was on par with I3 and I1. The root volume was significantly higher in I1 at 80, 110 DAS and at harvest. Relative water content and leaf water potential was not varied much among different rice cultivation systems but relative water content and leaf water potential at various stages of crop growth revealed at there was variation in grain yield due to irrigation regimes.

Authors and Affiliations