长乐沿海山地不同坡位湿地松生物量分析

Biomass analysis of Pinus elliottii at different slope positions in the coastal mountainous areas of Changle

对长乐沿海山地3年生湿地松人工林地上部分和地下部分生物量进行调查,结果表明:(1)下坡位湿地松林分平均树高、平均胸径和平均东西冠幅均高于上坡位,而平均南北冠幅则低于上坡位;(2)湿地松生物量、林下植被生物量及林分总生物量表现为下坡位高于上坡位,下坡位湿地松地上部分生物量、林下植被生物量及林分总生物量与上坡位相比均达到显著差异水平;(3)不同坡位湿地松地上部分各器官鲜生物量及干生物量大小均表现为:树干>树枝>树叶,湿地松地下部分不同径级根鲜、干生物量差异表现为:骨骼根>中根>大根>小根>细根。

According to the investigation of aerial part and underground part of biomass of 3 years old Pinus elliottii in Changle coastal mountainous areas, the data obtained were as follows. （ 1 ） The average tree height, diameter at breast height and crown breadth of the east and west in the downhill P. elliottii plantation were higher, longer and broader than those of the uphill plantation, but the average crown breadth of the north and south was smaller than that of the uphill plantation. （2） The biomass of P. eUiottii, undergrowths and the total biomass in the downhill plantation appeared more larger than those of the uphill plantation, meanwhile the differences of the biomaas of aerial part of P. elliottii and undergrowths and the total biomass between downhill and uphill plantation reached significance level. （3） The fresh and dry biomass of the different organs of the aerial part of P. elliouii in the downhill and uphill plantations performed in the order of trunk 〉 branches 〉 leaves, and the fresh and dry biomass of different diameters of roots of underground part of P. eUiottii performed in the order of bone roots 〉 middle roots 〉 big roots 〉 small roots 〉 fine roots.