采煤对太原市西山油松人工林树木个体生长的影响

对太原市西山3种不同开采梯度下油松人工林树木个体生长进行了研究。从树高、胸径、材积3方面初步揭示了煤炭开采对油松人工林树木个体生长的影响,旨在为研究地区植被恢复和生态重建提供理论依据。结果表明,煤炭开采对油松林木的树高、胸径、材积的生长都有明显的影响。在3个不同的开采强度下,油松树高、胸径、材积的总生长量差异显著,随着开采强度的增加,油松树高、胸径、材积的总生长量降低。3个开采强度下近30a树高、胸径的连年生长量与同时期的煤炭开采量具有显著的拟合效果(p<0.05),且后者至少可解释前者年际间生长变化50%的原因。

Impacts of Coal Mining on Individual Tree Growth of Pinus Tablaeformis Plantation in Western Mountains of Taiyuan City

Through the study of individual tree growth of Pinus tablaeformis plantation under three different gradients of coal mining conditions,the impacts of coal mining on individual tree growth of Pinus tablaeformis plantation are primarily revealed from the three aspects of height,diameter at breast height(DBH),and volume so as to provide a theoretical basis for the study of regional vegetation rehabilitation and biological reconstruction.Results show that the impacts of coal mining on total growth of tree height,DBH and volume of Pinus tablaeformis are significant.Under the three different coal mining extents,all the tree height,DBH and volume of Pinus tablaeformis have a significant difference in total growth,which decreases with the increase in mining extent.The annual successive growth of tree height and DBH of Pinus tablaeformis in recent 30 years has a significant fitting result(p<0.05) with the coal extraction during the same period.The latter can explain about 50% of the former inter-annual growth variation at least.