Oraon, P.R.Jyoti Prakash, Jay2022-05-052022-05-052019https://krishikosh.egranth.ac.in/handle/1/5810184300STUDIES ON EFFECT OF INORGANIC, ORGANIC AND BIOFERTILIZERS ON GROWTH AND BIOMASS PRODUCTION OF Albizzia lebbeck (L.) Benth AT SEEDLING STAGEwith the following objectives: (i) To study the seed characteristics and germination behaviour of Albizzia lebbeck seed sown in the soil of polybags treated with inorganic ,organic and biofertilizers(ii) To find out comparative efficiency of chemical , organic and biofertilizers on growth characteristics of Albizzia lebbeck at seedling stage. The nursery layout was made according to the requirements of the study. The study was conducted for time period of 6 months. The various treatment compositions were made by using inorganic, organic and biofertilizers with various levels. The seed characteristics were studied before sowing into the polybag. The germination parameters of the Albizzia lebbeck under the influence of various treatments were studied. The growth parameters as well as quality parameters were also studied. The physiological parameters of the seedlings were also studied in this research work. Final germination percentages (G) of Albizzia lebbeck seedlings under influence of applied treatment combinations showed that maximum (G) was found in PSB and Urea treatment combinations, the lowest mean germination time was found in PSB and Ureai.e. (942.25 hrs), germination rate index (GRI) of Albizzia lebbeck seedlings under influence of applied treatment combinations showed that maximum germination rate index (GRI) was seen in treatment combination having PSB, Brady rhizobium japonicum, Karanj cake and Urea (5.94%) while germination index (GI) of Albizzia lebbeck seedlings under influence of applied treatment combinations showed that maximum (GI) was seen in PSB and Urea(322.33). The growth parameters also showed variation among the treatment combinations. Shoot length of Albizzia lebbeck seedlings under influence of applied treatment combinations showed that maximum shoot length was in PSB and Urea (40.73 cm),root length of Albizzia lebbeck seedlings under influence of applied treatment combinations showed that maximum root length was in PSB and Urea (29.10 cm), collar diameter of Albizzia lebbeck seedlings under influence of applied treatment combinations showed that maximum collar diameter was in Brady rhizobium japonicum and Karanj cake(5.07 mm). The quality parameters were found to be significantly different between treatments. Root-shoot ratio of Albizzia lebbeck seedlings under influence of applied treatment combinations showed that maximum root-shoot ratio was in treatment containing sole Urea (1.29),vigour index (V.I) of Albizzia lebbeck seedlings under influence of applied treatment combinations showed that maximum (V.I) was in treatment in PSB and Urea combination (6486.65),sturdiness quotient (S.Q) of Albizzia lebbeck seedlings under influence of applied treatment combinations showed that maximum (S.Q) was in PSB and Urea combination (8.95) and Dickson quality index (Q.I) of Albizzia lebbeck seedlings under influence of applied treatment combinations showed that maximum (Q.I) was in Brady rhizobium japonicum(1.92). The eco-physiological growth parameters showed that the biofertilizers along with combination of inorganic fertilizers increases relative growth rate of the seedlings and accumulates more biomass as compared to the other treatments. The relative growth rate for two intervals are found maximum in PSB and Urea treatment combination (T8) 0.40 gday-1 and 1.04 gday-1, the Net assimilation rate for two intervals are found maximum in PSB and Urea treatment combination (T8) 0.55 gcm-2d-1and 0.92 gcm-2d-1. The leaf area ratios for 4 intervals have been recorded as follows: in LAR-1 the maximum was found in treatment combinations of Brady rhizobium japonicum and Karanj cake (T7)165.98cm2g-1, in LAR-2 the maximum was in (T7) 290 cm2g-1while in LAR-3 and LAR-4 the maximum value was found in treatment combinations of PSB and Urea (T8) 393.37 cm2g-1and 375.45 cm2g-1. The Physico-chemical characteristics of experimental soil after harvest of the seedlings are also studied. There was enrichment in soil available nitrogen and phosphorous due to action of Phosphorous solublizing bacteria and Rhizobial action. The available nitrogen was found maximum in treatment combinations of Brady rhizobium japonicum and Karanj cake (T7) i.e. 371.2 kgha-1. While available phosphorous was found maximum in treatment combinations of PSB and Urea (T8) i.e. 37.83 Kgha-1.EnglishThesis