بررسي اثر حمل و نقل با دو روش سنتي (با قاطر) و صنعتي (اسكيدر) بر خاك جنگلي

Impact of Mule and Skidder Logging on Forest Soils (Shefarood Forest)

Harvesting of forests is a necessary, logical and economical action as other Godʹs gifts. Although we know it is harmful for forests. For instance soil compaction is the most important of those damages. But we can determine the best harvesting methods for each zone with investigation of different harvesting systems that have the least damages in forests. The negative impacts of soil compaction on these sites include the reduced growth of seedlings and residual trees. In some cases, it increases the surface runoff and erosion. Therefore, we investigated the effect of two methods of transportation system used on forest soil, in district 9 of Shefarood. Soil compaction degree, by pressure and percentage of compacting dispersion causcd by skidding, estimated by this two method based on identical out putting volume (100m3). Along a pathway by 200 meter length, Sampling for bulk density was conductcd using a standard cylinder soil sampler in the depths of 0-10, 10-20 cm. The result showed that compaction in depth of 0-10 cm was more in animal logging compared with skidder. But adverse result obtained in the depth of 10-20 cm. These analysis show that the effect of skidding with mule and skidder, soil compaction, standing ground pressure and percentage of soil compaction was not significantly different between these methods in the depth of 20 cm. Also the standing ground pressure was significantly higher logged by mule than logged by skidder, but the pcrccntagc of spreading of compacting was more in skidding by the skidder.