不同坡位对福建柏生长影响的研究

Effects of different slope positions on growth of Fokienia hodginsii

对不同坡位的福建柏生长进行研究,结果表明:不同坡位对福建柏树高、胸径、枝下高生长有显著影响。随着坡位下降,树高、胸径、材积生长显著增大。下坡位平均树高生长达7.28 m,平均胸径生长达11.78 cm,单位面积材积生长达30.525 m3,单位面积材积比上坡位增长95%;中坡位平均树高生长达6.83 m,平均胸径生长达11.30 cm,单位面积材积生长达24.198 m3,单位面积材积比上坡位增长55%;上坡位平均树高生长仅为6.25 m,平均胸径生长为8.98 cm,单位面积材积生长仅为15.651 m3。福建柏在下坡位生长最佳,中坡位次之,上坡位最差。因此,福建柏商品林造林地最宜选择下坡位,较宜为中坡位。

Growth ofFokienia hodginsii on different slope positions were studied. The results show that there were significant influences of height, DBH, volume of timber of F. hodginsii on different slope positions. On down-slope, the growth of height and DBH averaged to be 7.28 m and 11.78 cm, and the growth of volume of timber per unit area was 30.525 m^3. Down-slope＇s volume of timber increased 95% more than that of upslope. On mid-slope, the growth of height and DBH averaged to be 6.83 m and 11.30 cm, and the growth of volume of timber per unit area was 24.198 m^3. Mid-slope＇s volume of timber increased 55% more than that of upslope. On upslope, the growth of height and DBH averaged to be 6.25 m and 8.98 cm, and the growth of volume of timber per unit area was 15.651 m^3. The growth of F. hodginsii on down-slope was the best, followed by the mid-slope. The least desirable slope position for F. hodginsii was upslope. Therefore, the optimum selection slope position for afforestation of commercial forests ofF. hodginsii was down-slope.