PRODUCTIVITY AND REGENERATION STUDIES IN Acacia auriculiformis A. Cunn. ex Benth.
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Date
2003
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University of Agricultural Sciences, Dharwad
Abstract
Evaluation of growth, productivity and regeneration as influenced by age and site factors aimed at identifying optimum conditions of climatic, topographic and edaphic factors required to increase the growth, productivity and regeneration of Acacia auriculiformis. Four site conditions viz., Coastal Zone, Low Ghat, Up Ghat and Eastern Plain were evaluated for various growth and productivity parameters. The regeneration status of the species was also evaluated from the selected sites. The total volume was highest in Coastal Zone at 4 years (67.16m3/ha), Low Ghat at 6 years (146.75 m3/ha) and Eastern Plain both at 8 years (256.09 m3/ha) and 10 years (331.36 m3/ha). The soil properties at 4 and 6 years were found to be better under Coastal Zone and Eastern Plain at 8 and 10 years. The initial establishment of the species was superior in Coastal Zone under 4 years (1.30/4m2), 8 years (3.45/4m2) and 10 years (3.05/4m2) while the initial establishment at 6 years (1.70/4m2) was highest in Low Ghat plantations. The establishment status under Up Ghat and Eastern Plain plantations was extremely poor. The growth and productivity parameters were positive and significantly associated with climatic and edaphic factors in the initial 4 and 6 years while the growth and productivity parameters were positive and non-significantly correlated at 8 and 10 year old plantations. The regeneration of the species exhibited positive and significant association with climatic and edaphic factors.
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