EFFECT OF HOLE DEPTHS AND SOIL MULLTCHING ON SURVIVAL OF SOME ORNAMENTAL TREES GROWN IN RAINFED AREAS

O. M. Sharbazhery, A.

	EFFECT OF HOLE DEPTHS AND SOIL MULLTCHING ON SURVIVAL OF SOME ORNAMENTAL TREES GROWN IN RAINFED AREAS
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 14, Issue 6, 2009, Pages 0-0
Author
A. O. M. Sharbazhery
Abstract
This study was performed on a forest land at Darbandikhan region, north of Sulaimani governorate, during 2002-2003 season . The purpose of this study was to asses dry farming of one year old seedlings of some ornamental trees ( Eucalyptus, washingtonia, Zizyphus, and Gladitschia), using different planting depths ( 30, 50, 70 and 85 cm ) and mulching of soil surface by whitepo lyethylene at 1.5 m diameter around the seedlings. The experiment was carried out using RCBD design with five replicates. Results showed that both planting depth and mulching treatments caused obvious effects on seedlings survival. Planting depth of 70 cm caused significant differences compared to the remainder treatments giving 58.75% survival percentage, the highest seedlings and leaf number/seedling as well. The mulching treatment also was giving dominant effects on non-mulching treatments, giving 58.75% survival percentage and both seedlings height and leaf number/seedling. Interaction effects of planting depths and mulching treatments also caused significant differences in survival percentage, in which the planting depth interacting with mulching was dominant on the remainder treatments, giving 82.5% survival percentage, 60.62 seedlings height and 13.12 leaves/seedling. There was a significant effect caused by 70 cm depth and mulching in Eucalyptus seedlings compared to the remainder combinations resulting with 95% success percentage, 117.5 cm seedlings height and 24.5 leaves / seedling.

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