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University of Agricultural Sciences, Dharwad (2004)

PRODUCTIVITY ASSESSMENT OF MULTIPURPOSE TREE SPECIES IN NORTHERN DRY ZONE OF KARNATAKA

Teli, Suresh

Titre : PRODUCTIVITY ASSESSMENT OF MULTIPURPOSE TREE SPECIES IN NORTHERN DRY ZONE OF KARNATAKA

Auteur : Teli, Suresh

Université de soutenance : University of Agricultural Sciences, Dharwad

Grade : Master of Science (MS) Forestry 2004

Résumé
The dry land ecosystems have become fragile becouse of low and erratic rainfall, improper soil and water cxjnservation practices and lack, of perennial vegetation. Inadequate soil moisture is the main constraint for the growth of plants in dry lands. There is greater scope to introduce perennial component to enhance overall productivity of land. Hence, an experiment was carried out to assess productivity of 10 MPTS as influenced by in-stu moisture conservation at Regional Agricultural Research Station, Bijapur during 2002-03. Trenching significantly increased wood volume and total dry biomass. The extent of increase in these parameters was 25.6 and 15.1 per cent respectively. Among the MPTS, wood volume and total dry biomass was highest in subabul (48.21 ra^/ha and 304.8 t/ha) followed by siris (33.0 m^/ha and 221.8 t/ha) and anjan (34.32 m’/ha and 175.2 t/ha). The growth attributes viz. height, dbh, clear bole height and crown spread differed significantly due to trenching at all stages. At 12 MAT, the respective increase in these parameters was 9.6, 14.21, 6.4 and 4.6 per cent due to trenching. Height, dbh and clear bole height were significantly higher in subabul than in other species. CAI in height, dbh and crown depths were significantly higher due to trenching. Subabul recorded significantly higher CAI in height, clear bole height and crown depth ; whereas, these parameters were lowest in dindal. CAI in dbh was significantly higher with anjan and lowest in dindaL The interaction between MPTS and trenching was significant. Significantly higher dbh was noticed in subabul due to trenching ; whereas, other species were unaffected. Trenching significantly increased the CAI in height of babul, siris, cassia and anjan ; whereas, other species were unaffected."

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