Form, Resistance To White And Brown Rot Fungi (Trametes Cingulata And Lentinus Lepideus Respectively) And Sapwood/Heartwood Contents Of Teak (Tectona Grandis) Poles From Trees Grown In Southern Nigeria

ABSTRACT

Teak (Tectona grandis) plantations established in three locations (sites) in Southern Nigeria: Ukpom Bende Forest Reserve in Abia State (Site 1), Oban Forest Reserve in Cross River State (Site 2) and Gambari Forest Reserve in Oyo State (Site 3) were studied to determine form and sap wood and heariwood contents of the poles from the plantations and their resistance to white rot liiiu.us ( 'framck's w,gu/iIa), brown rot fungus (I,e-#,Ii,i,is /epide,is) and contaminants. 'Free taper values varied significantly at 0.01 prol)ability level (P 0.0 I) bet wecu the sites, but did not vary between individual trees grown on each of the sites, There was significant relationship between pole-taper and the pole-diameter. The r2values of the relationships for the three sites were 0.20, 0.20 and 0.002 for sites I, 2, and 3 respectively. There was significant relationship between taper and pole height. Merchantable [bum Factors of the poles with an overall mean value of 0.42 varied slightly at 0.05 probability level