STUDIES ON EFFECTS OF SPACING, DECAPITATION AND BIOFERTILIZERS ON GROWTH AND YIELD OF Swertia chirayita (Roxb. ex. Flem.) Karst.
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Date
2010
Authors
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UHF,NAUNI,SOLAN
Abstract
ABSTRACT
The present investigation entitled, “Studies on effects of spacing, decapitation and
biofertilizers on growth and yield of Swertia chirayita (Roxb. Ex. Flem.) Karst.” was carried out in
laboratory and experimental area, located at Shilly of the Department of Forest Products, during 2008-
2010.The investigation was based on 3 experiments : (1) Effect of spacing and decapitation on
growth and yield (2) Effect of biofertilizers on growth and yield (3) Visualization of mycorrhizae
association in roots. With the increase in pinching height, there is increase in all the growth and yield
parameters and maximum mean plant height (116.90 cm), mean number of branches (7.44), mean fresh
aerial biomass per plant (57.10 g), mean fresh root biomass per plant (4.521 g), mean dry aerial
biomass per plant (14.91 g), mean dry root biomass per plant (1.148 g), mean whole plant fresh
biomass per plant (61.62 g), mean whole plant dry biomass per plant (16.05 g) and mean expected dry
biomass yield (11.80 q/ha) were recorded under 40 cm decapitation/pinching height. Among all the
spacing, mean fresh biomass yield per plant (49.17 g/plant) and mean dry biomass yield per plant
(13.30 g/plant) were maximum under 30 x 45 cm spacing. Combined application of biofertilizers
containing Azotobacter and VAM at nursery as well as transplanting stage resulted in maximum plant
height (181.7 cm), fresh stem biomass (129.50 g/plant), fresh radical leaves biomass (54.47 g/plant),
fresh cauline leaves biomass (10.92 g/plant), fresh root biomass (11.64 g/plant), dry stem biomass
(29.08 g/plant), dry radical leaves biomass (11.79 g/plant), dry root biomass (3.54 g/plant), whole plant
fresh biomass (206.70 g/plant) and whole plant dry biomass (46.77 g/plant).The amarogentin content
ranged from 0.171 to 0.238 percent in radical leaves, 0.144 to 0.443 percent in cauline leaves, 0.216 to
0.334 percent in stem, 0.210 to 0.388 percent in roots and amaroswerin content ranged from 0.125 to
0.248 percent in radical leaves, 0.142 to 0.365 percent in cauline leaves, 0.026 to 0.079 percent in stem
and 0.019 to 0.050 percent in roots of Swertia chirayita in different treatments of biofertilizers.
Statistically at par value for amarogentin yield per plant and amaroswerin yield per plant were observed
under treatment in which Azotobacter, PSB and VAM were applied only at nursery stage and treatment
in which Azotobacter and VAM were applied both at nursery as well as transplanting stages. All the
plants treated with VAM inoculum show the mycorrhizal association.
Description
Keywords
irrigation, energy resources, biological phenomena, land resources, environment, wood, economics, seasons, manpower, planting