Effect of water imponding on growth attributes of rice

Abstract

A field experiment was conducted during the Kharif 2017 at S.G. College of Agriculture and Research Station, Jagdalpur on sandy loam soil with five treatments viz., water imponding of 15, 30 and 45 days 10 days after transplanting, bispyribac sodium 25 g ha-1 as post-emergence and without water imponding (Control) in factorial randomized block design with four replications. The growth parameters viz., plant height, tillers/plant, LAI, RGR and panicle length (cm), seeds/panicle, grain yield were significantly higher with 30 days water imponding 10 days after transplanting than remaining treatments. The treatment viz., 30 days water imponding 10 days after transplanting was found significantly higher grain yield (24.24 q ha-1) than other treatments imposed except application of bispyribac-sodium 25 g ha-1 as post-emergence 15 days after transplanting (22.63 q ha-1) being on par to 30 day water imponding. The highest net return was gained with bispyribac-sodium (Rs 9165.74 ha-1) with higher B: C ratio compared to 30days water imponding 10 days after transplanting.