EFFECT OF PHYSIO-CHEMICAL PROPERTIES OF SOIL IN THE GROWTH PERFORMANCE OF Ailanthus excelsa SELECTIONS IN SOUTHERN INDIA
Ailanthus excelsa Roxb. is a deciduous tree species, indigenous to India and belonging to the family Simaroubaceae. This species has an added advantage over the other Multi Purpose Tree Species as it is fast growing and short rotation agro-forestry species. There is a heavy demand of raw material for safety matches industries in Tamil Nadu and it is procured from other states of India. The genetic resources of A. excelsa were collected from different agroclimatic zones of India viz., Tamil
... ia viz., Tamil Nadu, Andhra Pradesh, Rajasthan and Uttarakhand. Field experiments were laid out Randomized Block Design (RBD) with three replications and four trees per replication were adopted spacing of 3x3m in that study period of 2005 to 2010. Two progeny trials have been established in Tirupati (Andhra Pradesh) and Salem (Tamil Nadu) with 55 seed sources of selected CPT's. Soil samples were collected from experimental plots in two different depths such as 0-30cm and 31-60 cm and physio-chemical analysis viz., Soil pH, EC, BD, OC, soil texture and available NPK are done. Growth attributes viz., height, diameter and volume index were recorded in the progeny trail for three consecutive years (2008 to 2010). The data were analyzed using statistical software AGRES and GENRES. In the experimental site, the meteorological data was collected for six consecutive years (2005-2010) has no significant variation observed. But, significant variation was found in the morphological characters. These are evidences for the present study showed that Tirupati trail exhibited better performance in all growth characters with high OC and available NPK comparatively in Salam trail. Besides overall growth performance of A. excelsa, it was observed individually(third year) that the progenies of IFGTBAE-45 followed by IFGTBAE-47 of Tirupati trail and IFGTBAE-43 and IFGTBAE-9 in Salam trail were performed better growth in the terms of plant height and basal diameter respectively. Among the growth performance of 55 progeny, Tirupati exhibited 8 sources and 7 sources from Salam trail showed significant difference were found in height, basal diameter and volume index respectively.