STUDIES ON ECO RESTORATION OF DERELICT AND DEGRADED LAND THROUGH TREE FARMING WITH INDIGENOUS FOREST TREE SPECIES
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Date
2018-07-23
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
Degraded lands are ecologically unstable, unproductive and have a negative
influence on the environment. A patch of fallow land with sodic soil was identified at
ZARS, V. C., Farm, Mandya, Karnataka, for the experimental study to restore the site
with indigenous forest tree species. Based on growth performance, eight indigenous tree
species Viz, Terminalia catappa, Melia dubia, Artocarpus hirsutus, Syzygium jambos,
Madhuca indica, Thespesia populnea, Pongamia pinnata and Azadirechta indica were
selected for planting on the derelict site. To promote better growth rate of tree species in
adverse soil conditions, gypsum as soil amendment was applied at 1, 2, 3 kg per pit for
each species. Observations were recorded on different growth parameters like plant
height, collar diameter, internodal length as well as total dry matter at periodical intervals
till 180 days. Among the eight native forest tree species, Syzygium jambos recorded
maximum plant height at 180 days after planting followed by Pongamia pinnata and
from gypsum treatment T1 (36.18 cm) showed significant increase in plant height and
maximum collar diameter was observed in Terminalia catappa (1.04 cm) and Pongamia
pinnata (1.05 cm). Considerable increase in total dry matter production was recorded in
Syzygium jambos. The field study indicated a positive response in restoring the degraded
and derelict land with different levels of gypsum and it also favorably altered the physical
and chemical properties of the soil and improved the soil condition in favor to the growth
of indigenous forest tree species.
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