THE PRODUCTION OF EUCALYPTUS CAMALDULENSIS DEHNH. ESTABLISHED UNDER THE AGROFORESTRY SCHEME

Abstract

The study was carried out at Somdet Reforestation, Kalasin Province, which is under the supervision of Forest Industry Organization (FIO). The E. camaldulensis plantations selected were 4 year-old and 7 year-old. They were established under forest village system using agroforestry approach. Saying that the area between trees 'rows, with 2x8 m spacing, had been used for intercropping purpose at least 3 years in a row. Cassava was observed to be the primary crop. The twelve experimental plots with 48x48 m. in size were set-up appropriately in each of the plantations studied. All of the trees in the plots were measured their DBH and height carefully. Various forms of their productivity were estimated from their corresponding regression equations constructed from sample trees. The results showed that the survival rate in the plantations were insignificantly different ie. 86.7% for 4 yr-old and 85.3% for 7 yr-old plantation. In addition, the distribution of trees in accordance with their DBH-class showed the evidence that for 4 yr-old plantation 52% and 38.8% of them fell in 10-15 cm and 5-10 cm. of DBH-class; and for 7 yr-old plantation 45.5% and 35.2% of them fell in 15-20 cm and 10-15 cm. of DBH-class respectively. Regarding the production of E. camaldulensis, the 4 yr-old plantation yielded as follows: 4.48 cu.m./rai of stem volume, on the other hand, or 2.34 ton/rai., 0.4 ton/rai and 0.33 ton/rai of stem. branch and leaf biomass respectively ; and the 7 yr-old plantation yielded as follows : 12.7 cu.m./rai of stem volume, on the other hand, 7.1 ton/rai, 1.35 ton/rai and 0.28 ton/rai for stem, branch and leaf biomass in that order. (Take note that 1 rai is equivalent to 0.16 ha.)