Comparison of product, biomass and kinds of wood consumption of white poplar (Populus alba L.) in four plant spacing

Nowadays, wood farming with fast-growing species such as poplar species is inevitable. This study was performed to investigate the effect of different spacing on the production, biomass and the type of wood using of Populus alba in 10-year-old poplar plantations in fast-growing poplar research center of Boldaji city and Korran village of Farsan city, Chahar Mahal and Bakhtiari province. For this purpose, four one-hectare plantations with these species with four different plant spacing (0.5 × 0.5, 1 × 1, 2 × 2 and 4 × 4 m) were selected. Diameter and height of trees were measured and 10 trees in each region and totally 40 trees were selected. These trees were then felled down, cut and weighed in field by separating into trunks, branches, sub-branches and leaves. Several samples from different parts of felled trees were also obtained and transferred to the lab. After drying in 80 degrees centigrade, samples were weighed with digital scale with 0.001g accuracy and dry weight of each part was calculated by using proportionality. The results showed that 0.5 × 0.5 m spacing had the most production with 735.88 tons per hectare and 475.65 tons per hectare and 2 × 2 m spacing is the suitable plant spacing for this species with 241.126 and 162.521 tons per hectare production and biomass, respectively.