STUDIES ON EFFECT OF INORGANIC, ORGANIC AND BIOFERTILIZERS ON GROWTH AND BIOMASS PRODUCTION OF Albizzia lebbeck (L.) Benth AT SEEDLING STAGE
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Date
2019
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Birsa Agricultural University, Ranchi
Abstract
with 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.
Description
STUDIES ON EFFECT OF INORGANIC, ORGANIC AND
BIOFERTILIZERS ON GROWTH AND BIOMASS
PRODUCTION OF Albizzia lebbeck (L.) Benth AT
SEEDLING STAGE