水曲柳人工造林与培育技术的研究

Research on artificial forestation and cultural techniques to Fraxinus manshurica

在缓坡、轻微水湿地、农耕地等不同立地进行水曲柳人工造林,以农耕地为最佳,其次是缓坡。农耕地10 a生水曲柳人工幼林平均树高为5．430 m,为其它立地水曲柳人工幼林树高均值的150．0％,单位面积立木蓄积为其它立地立木蓄积的158．3％,树高、胸径最大值分别为6．80 m和7．3 cm,表现出较强的生长优势。水曲柳人工林生长规律为:3 a、6 a生时,树高、胸径、材积生长开始加快,速生期内胸径、树高连年生长量分别在0．40-0．67 cm之间和0．500 0-1．000 0 m之间。采用Riehards曲线进行水曲柳人工幼林树高生长过程拟合,结果为H=8．773 545×[1-EXP(-0．217 416 5 X)]3.574 767。

The results from the research on artificial forestation and cultural techniques to Fraxinus manshurica are： The farmland is optimal planting site among the gentle slope land, slight water - sick land and farmland, the second is gentle slope land. The even tree height of the 10- yr - old stand in the farmland has reached 5.43 m to be 1.50 times, and per refit standing volume to be 1.58 times that of the other sites. Furthermore, the maximums of tree height and diameter at breast height （6.80 m and 7.3 cm, respectively） shows its stronger growth predominance in the farmland. The growth regularity of Fraxinus manshurica plantation had been revealed in the research, the growths in tree height, DBH and volume began fast gradually at the 3yr and 7yr , the current annual increment of tree height and DBH are up to 0.500 - 1.000 m and 0.40 - 0.67 at the fast growing stages. It concluded that H = 8.773 545× [ 1 - EXP（ - 0.217 416 5 X）]^3.574767 by Richards curve - fitting applied to height growth process of young plantation of Fraxinus mandshurica.