Đang chuẩn bị liên kết để tải về tài liệu:
Báo cáo lâm nghiệp: "Soil compaction caused by 450C Timber Jack wheeled skidder (Shefarood forest, northern Iran)"

Không đóng trình duyệt đến khi xuất hiện nút TẢI XUỐNG

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Soil compaction caused by 450C Timber Jack wheeled skidder (Shefarood forest, northern Iran). | JOURNAL OF FOREST SCIENCE 53 2007 7 314-319 Soil compaction caused by 450C Timber Jack wheeled skidder Shefarood forest northern Iran R. Naghdi1 I. Bagheri1 M. Akef2 a. Mahdavi3 Department of Forestry Faculty of Natural Resources The University of Guilan Sowmehsara Iran Department of Soil Science College of Agriculture The University of Guilan Rasht Iran Department of Forestry Faculty of Agriculture University of Ilam Ilam Iran ABSTRACT In forest harvesting operations usually after using skidding machinery skidders traces of soil damage in the form of soil compaction and wheel and logs ruts can be seen in the forest soil. Soil bulk density which represents soil compaction decreases soil porosity infiltration rate and aeration and these in turn increase runoff and water erosion in the harvested area. On the other hand a decrease in soil aeration prevents root growth and decreases the vegetative cover. In this study the changes in soil bulk density and relative soil compaction due to a different number of wheeled skidder passes from stump to landing for two soil types clay soil with high and low liquid limits CH CL are analyzed. The results showed that the effect of skidder traffic on an increase in soil bulk density at sample locations was significant a 0.05 . The range of soil bulk density increases in sample pits due to a different number of machinery passes was from 15.8 to 62.6 compared to the control area. The findings of this research showed that the interaction effect of skidder traffic and soil type on soil bulk density changes was not significant. Also the highest significant increase in soil bulk density occurred at the first 11 passes in skidding trails and from this number of passes onwards there was no significant difference in the soil bulk density increase in sample locations. Keywords soil compaction forest soil wheeled skidder Iran The northern forests of Iran with 1.9 million hectares are very important for their capability of producing timber and

TÀI LIỆU LIÊN QUAN

Báo cáo lâm nghiệp: "Specification of the beechwood soil environment based on chosen soil properties, aiming at the Fageta paupera habitat"

Báo cáo lâm nghiệp: "Holm oak (Quercus rotundifolia Lam.) and Aleppo pine (Pinus halepensis Mill.) response to different soil preparation techniques applied to forestation in abandoned farmland"

Báo cáo lâm nghiệp: "Multivariate statistical approach to comparison of the nutrient status of Norway spruce (Picea abies [L.] Karst.) and top-soil properties in differently managed forest stands"

Báo cáo lâm nghiệp: "Comparison of the impact of blue spruce and reed Calamagrostis villosa on forest soil chemical properties"

Báo cáo lâm nghiệp: "The first reaction of soil mite fauna (Acari, Mesostigmata) caused by conversion of Norway spruce stand in the Szklarska Poręba For"

Báo cáo lâm nghiệp: "The effect of point application of fertilizers on the soil environment of spread line windrows in the Krušné hory Mts"

Báo cáo lâm nghiệp: "Ground based operation effects on soil disturbance by steel tracked skidder in a steep slope of forest"

Báo cáo lâm nghiệp: "Soil compaction caused by 450C Timber Jack wheeled skidder (Shefarood forest, northern Iran)"

Báo cáo lâm nghiệp: "Soil characteristics under selected broadleaved tree species in East Norwa"

Báo cáo lâm nghiệp: "Different technologies of floodplain forest regeneration from the aspect of soil changes"
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.