Effect of water imponding period on NPK content in weed under midland situation

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. Significant reduction of nitrogen content in weed was recorded with Panicum repens (0.61%), Brachiaris reptans (0.60%), Cyperus difformis (0.47%), Eleocharis indica (0.49%), Fimbristylis miliacea (0.48%), Dopatrium junceum (0.53%), Ammania baccifera (0.52%), and others (0.45%) under water imponding was maintained till 30 days 10 days after transplanting as compared to weedy check. Similarly, phosphorus and potassium content (%) showed the trends for weeds.