Kalita, P.Borah, Horipriya2022-03-142022-03-142018-07https://krishikosh.egranth.ac.in/handle/1/5810183359A field experiment was conducted during the rabi season of 2017-18 at ICR farm (organic block) of AAU, Jorhat-13. Five lentil genotypes were evaluated for their morpho-physiological performance in response to three different sources of organic manure. The genotypes were HUL-57, SLC-102, SLC-101, KLS-218 and PL-406 which were collected from Regional Agricultural Research Station, AAU, Shillongani, Nagaon and the souces of organic manure were FYM, vermicompost and poultry manure. The recommended package of practices for lentil under Assam situation were followed for raising the crop . The recomended levels of N, P and K were supplied with various organic manure sources. Significant variations were recorded among the genotypes as well as sources of organic manure at both the stages of observation in relation to the various traits viz plant height, leaf biomass, root biomass, whole plant biomass. The traits viz. root volume, root surface area, nodules number, stem biomass ,reproductive biomass, in-vivo leaf nitrate reductase activity, total chlorophyll content of leaf, lipid peroxidation, leaf nitrogen content, leaf phosphorus content showed significant variation due to genotypes as well as organic manure sources at active pod filling stage only. At harvest number of pods per plant, 100 grain weight, grain yield and harvest index also exhibited significant variation due to genotypes as well as sources of organic manure.The interaction between genotypes and manure sources were found to be significant for the traits viz leaflet number per plant for both the stages of observation and stem biomass at 50% flowering and leaf proline content at active pod filling stage. Highest values of these traits were recorded in the plants supplied with vermicompost followed by poultry manure and FYM except the trait of lipid peroxidase activity which showed just the opposite trend. The genotype KLS-218 with vermicompost treatment recorded the highest plant biomass and grain yield at harvest. This increase in grain yield was 9.1% and 6.8% with vermicompost over FYM and poultry manure respectively. The highest grain yield in KLS-218 may be attributed to the higher values in the traits like relative leaf water content, leaflet no per plant, nodule no per plant, leaf biomass, stem biomass, reproductive biomass, whole plant biomass, nitrate reductase activity, total leaf chlorophyll content, proline content, leaf nitrogen content, leaf phosphorus content, no of pods per plant, no of seeds per pod, 100 grain weight and harvest index. From the correlation study positive and significant correlation were recorded between seed yield and relative leaf water content (0.772**), seed yield and leaflet no at 50% flowering(0.887**), seed yield and leaflet no at active pod filling stage (0.790**, seed yield and nodule no (0.911**), seed yield and leaf biomass at 50%flowering (0.891**), seed yield and leaf biomass at active pod filling stage (0.854**), seed yield and stem biomass at 50%flowering (0.909**), seed yield and stem biomass at active pod filling stage (0.908**), seed yield and whole plant biomass at 50%flowering (0.935**), seed yield and whole plant biomass at active pod filling stage (0.967**), seed yield and reproductive biomass (0.924**), seed yield and nitrate reductase activity (0.883**), seed yield and total chlorophyll content (0.873**), seed yield and proline content (0.895**), seed yield and leaf nitrogen content (0.923**), seed yield and leaf phosphorus content (0.878**), seed yield and no of pods per plant(0.919**), seed yield and no of seeds per pod(0.892**), seed yield and 100 grain weight (0.907**) and seed yield and harvest index (0.979**). The genotype KLS-218 registered highest benifit cost ratio i.e 1.43, 1.52, 1.46 for FYM, vermicompost and poultry manure respectively and this genotype can be recomended for Assam condition with the supply of N,P and K through vermicompost.EnglishThesis