Growth and yield of sorghum or cowpea in an agrisilviculture system in semiarid India |
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Authors: | M Osman W H Emminhgam S H Sharrow |
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Institution: | (1) Central Research Institute for Dryland Agriculture, Santoshnagar, Hyderabad, India;(2) Department of Forest Science, Oregon State University, Corvallis, Oregon 97331, USA;(3) Department of Rangeland Resources, Oregon State University, Corvallis, Oregon 97331, USA |
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Abstract: | This study was conducted near Hyderabad, India during 1991–1994 to quantify the effects of shoot pruning, fertilization, and
root barriers around Leucaena leucocephala trees on intercropped sorghum(Sorghum bicolor) or cowpea (Vigna unguiculata) crop
production under rainfed conditions. Crop plants grown with pruned trees attained higher dry matter and leaf area index than
did those with unpruned trees. Two-year mean grain yields of sorghum with no root barriers were76% and 39% of pure crop yield
(1553 kg ha–1)for pruned and unpruned trees, respectively. Corresponding values for cowpea were 49% and 26% of pure crop yield
(1075 kgha–1). Sorghum or cowpea intercropped with trees responded to fertilizer application more strongly than did their
respective pure crops, suggesting an increased need for fertilizer application in this agrisilviculture system over that currently
used for pure crops. Impact of root barriers was small on either crop. Irrespective of root barriers, a high response to tree
pruning suggested above ground competition for light dominated tree/crop interactions in this agrisilviculture system.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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Keywords: | competition fertilization Leucaena leucocephala pruning Sorghum bicolor tree crop interactions Vigna unguiculata |
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