Pandey, P.C.Indra Jeet2018-10-272018-10-272008-06http://krishikosh.egranth.ac.in/handle/1/5810082342The present study was conducted during kharif 2007 on a mollisol at Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar, U.S. Nagar, Uttarakhand, India. Twelve treatments consisting of organic fertility treatments viz. FYM 5 t, FYM 10 t, FYM 5 t + SR (Sesbania rostrata), inorganic fertility treatments i.e. N120P60K40, N180P60K40, N200P60K40, NCU120P60K40 and integrated fertility treatments i.e. N60P30K20 + FYM 5 t, N120P60K40 + straw mixed (4 t/ha) straw burned (4 t/ha), SA (Sesbania aculeata) + N0P60K40 and control in Randomized Block Design with 4 replications. Green manuring of Sesbania rostrata (42.8 t/ha green biomass at 60 days stage) with FYM (5 t/ha) produced significantly higher grain yield (6.5 t/ha) than other treatments except FYM 10 t, N180P60K40 and N200P60K40. These treatments also produced significantly higher biological yield than recommended dose of fertilizer (N120P60K40). The different fertility treatments were found to have significantly bearing on tillering, height and dry matter accumulation. Dry matter accumulation at maximum tillering stage (60 DAT) was highest with FYM + SR and significantly higher than all treatments except SA + N0P60K40 and N200P60K40. Rice crop grown with FYM + SR removed the highest N through grain and total biomass, and highest phosphorous through straw and total biomass. These organic treatments also improved soil fertility. On the basis of present study, it may be concluded that the use of organic sources i.e. Sesbania rostrata green manuring with FYM 5 t, FYM 10 t and integrated use of N120P60K40 + straw burned and SA + N0P60K40 in rice can sustain soil fertility status in intensive rice-wheat cropping system.ennullThesis