Dwivedi, S.K.Deore, Tejas Shantaram2016-07-302016-07-302014http://krishikosh.egranth.ac.in/handle/1/70237AB S T R AC T The present research investigation entitled “Physiological assessment of assimilate partitioning, growth, productivity and quality of soybean (Glycine max (L). merill) under long term fertilizer application” was conducted with ten treatments of various levels of inorganic and organic fertilizers, Viz., NPK, S, Zn, and FYM in a RBD with four replication, at Research Farm, Department of Soil Science and Agricultural Chemistry; College of Agriculture JNKVV, Jabalpur during kharif season 2013-14. The various levels of organic and inorganic fertilizers significantly affected assimilatory, physiological, morphological and biochemical traits of growth and productivity. A progressive pattern of increase in LAI was noted with advancement of crop age and maximum was noted with the treatment 100% recommended dose of fertilizer (20:80:20 NPK kg/ha) + FYM (15t/ha) at 60 DAS. The LAD increases up to 45-60 DAS and there after it declined sharply. Maximum LAD was maintained with 100% RDF + FYM (15t/ha) 30-45, 45-60 and 60-75 DAS. Similarly, maximum CGR, RGR and SLA was noted at 45-60 DAS with a differential pattern among various treatments of organic and inorganic fertilizers. The productivity of a crop is dependent on its inherent capacity of photosynthesis, photosynthetic assimilatory surface area and availability of photo synthetically active radiation within the crop canopy. The application of 100% RDF + FYM (15t/ha), significantly enhanced PAR absorption, stomatal conductance, transpiration rate, leaf chlorophyll and carotenoid contents along with the seed protein and oil content. The betterment in structural components of yield resulted in maximum realization of productivity potential in soybean with the application of RDF 100% + FYM. The yield attributing characters of soybean viz., plant height, total no. of nodes, effective nodes and pod length No. of pods/plant, pod weight, biological yield/plant and (kg/ha), harvest index(%) and seed yield/plant and(kg/ha), significantly improved with treatment comprising of 100% RDF + FYM (15t/ha). It is concluded that 100% RDF (20:80:20 NPK kg/ha) + FYM (15t/ha) combination is the optimum combination for achieving maximum production, better growth rate and efficient partitioning of assimilates to the economic sink and also for a higher photosynthetic efficiency of soybean.enThesis