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Eucalyptus geometry in agroforestry on waterlogged saline soils influences plant and soil traits in North-West India.

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Title Eucalyptus geometry in agroforestry on waterlogged saline soils influences plant and soil traits in North-West India.
Not Available
 
Creator JC Dagar,
K Lal,
J Ram,
M Kumar, SK Chodhari,
RK Yadav
Gurbachan Singh
 
Subject Eucalyptus tereticornis
Secondary salinization
Tree spacing Transpiration rate
 
Description Not Available
Impacts of agroforestry comprising wheat and rice crops in combination with Eucalyptus tereticornis trees
having high transpiration rate were assessed for remediation of waterlogged saline soils. To
find out
optimum spacing of trees in strip plantation for higher water table draw down, wood production and
crop yield, a study was carried on waterlogged
fields by planting E. tereticornis (clone C-7) in paired rows
on ridges (0.5-m height) made along the
field boundaries in north-south direction at 1 m

1 m,1 m

2 m
and 1 m

3 m spacing resulting in population of 300, 150 and 100 trees ha 1. The results were also
compared with the control (field without tree plantation) and block plantation. During sixth year of
growth, Eucalyptus attained the maximum growth in 1 m

3 m spacing followed by 1m

2m, 1m

1m;
and minimum in block plantation. Due to higher number of trees per unit area, timber dry wood
production was 33.5 Mg ha 1 in spacing of 1 m

1 m; 19.1 Mg ha 1 in 1 m

2 m and 13.5 Mg ha 1 in
1m

3 m and sequestered 15.2, 8.9 and 6.4 Mg C ha 1, respectively. Block plantations of Eucalyptus
generated 141.7 Mg ha 1 timber wood biomass and sequestered 66.5 Mg C ha 1. The transpiration rate of
Eucalyptus in block plantation on an average was 40.0 L day 1 tree 1 compared to 68.0, 71.5 and
73.8 L day 1 tree 1 in 1 m

1 m, 1m

2 m and 1m

3 m tree spacing, respectively in strip plantation. The
corresponding total amount of water transpired per annum was 1825 mm in block plantation and 745,
391, 269 mm in 1 m

1 m, 1 m

2 m and 1m

3 m tree spacing. Due to high transpiration rate of
Eucalyptus, water table was lowered by 43.0 cm in 1 m

1m; 38.5 cm in 1 m

2 m and 31.5 cm in
1 m

3 m spacing during the fourth year of plantation than in adjacent
fields without plantation. Near
the tree lines, grain yields of both wheat and rice were comparatively low. But lowering of water table
resulted in improvement in soil properties which produced 1.7 and 1.3 folds higher grain yield of wheat
and rice respectively compared to control. The results suggested that in a rotation of six years, 1 m

1 m
spacing for strip plantation of Eucalyptus in paired rows on farm acre line was the optimum for achieving
higher water table draw down, wood biomass production, carbon sequestration and crop productivity on
waterlogged
fields.
Not Available
 
Date 2019-11-29T10:14:01Z
2019-11-29T10:14:01Z
2016-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/25890
 
Language English
 
Relation Not Available;
 
Publisher Not Available