بررسی تعیین ارقام مناسب صنوبر در سیستم بهره برداری کوتاه مدت

Poplar are major fast- growing tree Species producing high yield in short period with spicial technological traits and usage in Pulp and paper as well as parrticleboard industries. The objective of the research project was to investigate the production rate in unit area and to increase farmers revenues out of plantaion programs، using most suitable clones for short rotation system in the periods of 2 ، 3 and 4 years removal، in this research we investigated on 10 clones of poplars cultivated with spacing of 50 * 150 cm. At the first stage (two years old) after measuring parameters such as، percentage survival، number of shoots per seedling، number of shoots over 2 meters، height and diameter means، all shoots were removed weighted. Then we computed the weight was obtained by drying out at 104 for 24 hours، the results obtained by measurements، inventory، analysis، statistical computations and finding the ratio of the relevant regressions indicated that Populus deltoides 69/55 and populus eur. Triplo Species had dry wood matter productivity over 10 tones per hectare per year. populus eur. 455 With approximately 4 tones per hectare per year، had the lowest dry matter production rate.

Keywords:

صنوبر , زیست توده , صنایع سلولزی , تعداد نهال , جست , وزن خشک (چوب) , وزن ماده خشک , بهره برداری کوتاه مدت , مازندران