Soil compaction from logging equipment: Effects on growth of young ponderosa pine
Soil compaction from logging equipment: Effects on growth of young ponderosa pine
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伐木设备压实土壤：对黄松幼苗生长的影响
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发表时间：
1979
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影响因子：
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通讯作者：
Henry A. Froehlich
中科院分区：
文献类型：
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作者：
Henry A. Froehlich
在收获黄松产生的拖拉机滑轨压实的土壤被证明是持久的。在伐木16年后，7.6厘米和15.9厘米（3英寸和6英寸）深度以及22.9厘米和30.5厘米（9英寸或12英寸）深度的滑径土壤密度分别比相邻未受干扰的土壤密度高18%和9%。残松幼树的生长与根区土壤压实强度和面积呈负相关。在16年的时间里，中度受影响的树木的生长速度下降了6%，严重受影响的树木的生长速度下降了12%。测井设备可能会导致土壤物理性质的变化，这取决于受影响的区域，重复行程导致土壤密度的相对增加，以及过滤和孔隙度的减少。拖拉机小径通常占拖拉机记录地点的25%至35%（5,9,13,14）。与相邻的割草地相比，在滑道上种植的幼苗可能减少三分之二，生长减少40%或更多（6,12,15）。滑径压实也可能影响剩余树木的生长。Moehring和Rawls（11）表明，40年生火炬松（Pinus taeda L.）的生长减少与根区土壤压实的严重程度密切相关。在受严重影响的树木中，生长下降幅度高达40%。由于采用传统的伐木方法进行间伐可能会延缓树木的发育，因此我研究了土壤压实的寿命及其对残余幼黄松（Pinus pon- derosa L.）生长速度的影响。研究方法
Compacted soils in tractor skid trails produced by harvesting ponderosa pine proved to be long-lasting. Soil densities in skid trails at 7.6- and 15.9-centimeter (3-and 6-inches) depths and 22.9- and 30.5-centimeter (9- or 12-inches) depths were 18 and 9 percent greater, respectively, than those of adjacent, undisturbed soils 16 years after logging. Growth of residual young pine trees related negatively to the area and in- tensity of soil compaction in the root zone. Moderately impacted trees showed a 6 percent reduction in growth rate and heavily impacted trees showed a 12 percent reduction over a 16-year period. L OGGING equipment may cause changes in soil physical properties de- pending upon the area affected, the relative increase in soil density with repeated trips, and the reduction in in- filtration and porosity. Tractor trails com- monly account for 25 to 35 percent of a tractor-logged site (5, 9, 13, 14). Seedling established on skid trails may be reduced by two-thirds and growth re- ductions of 40 percent or more may occur in comparison to adjacent cutover lands (6, 12, 15). Skid-trail compaction may also af- fect the growth of residual trees. Moehring and Rawls (11) showed that growth reduc- tion in 40-year-old loblolly pine (Pinus taeda L.) related closely to the severity of soil compaction in the root zone. The growth decline was as much as 40 percent in the case of heavily impacted trees. Because thinning by conventional log- ging methods may retard development of trees, I examined the longevity of soil com- paction and its effect on the growth rate of residual young ponderosa pine (Pinus pon- derosa L.). Study methods