DOI: 10.1016/j.foreco.2016.03.021
Scopus记录号: 2-s2.0-84960424460
论文题名: Effect of thinning and soil treatments on Pinus ponderosa plantations: 15-year results
作者: Zhang J. ; Webster J. ; Young D.H. ; Fiddler G.O.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 368 起始页码: 123
结束页码: 132
语种: 英语
英文关键词: Fertilization
; Soil compaction
; Stand productivity
; Sub-soiling
; Whole tree thinning
; Wood chip returns
Scopus关键词: Carbon
; Compaction
; Ecology
; Fertilizers
; Machinery
; Nitrogen removal
; Soil mechanics
; Soils
; Wood products
; Fertilization
; Soil compaction
; Stand productivities
; Sub-soiling
; Whole trees
; Wood chip
; Forestry
; beetle
; biomass
; bulk density
; carbon sequestration
; coniferous tree
; fertilizer application
; growth rate
; nutrient dynamics
; plantation forestry
; productivity
; removal experiment
; soil nutrient
; subsoil
; thinning
; wood
; Chips
; Compaction
; Fertilization
; Productivity
; Soil
; Hexapoda
; Pinus ponderosa
; Scolytinae
英文摘要: Thinning with removal of whole trees in a plantation or natural forest stand raises two main concerns - soil compaction from the ground-based machinery and nutrient depletion particularly with whole tree harvest as is often practiced for attendant fuels reduction. To address these concerns, two sets of experimental treatments were imposed in young ponderosa pine plantations. In the first set, we applied four treatments to test the effects of thinning with biomass removal using progressively more soil manipulations: (I) control, (II) thinning only with all biomass removed, (III) same as (II) but followed by sub-soiling in traffic lanes, and (IV) same as (III) but with nitrogen and phosphorus fertilization within traffic lanes prior to sub-soiling. In the second experiment set we applied four combination treatments to test the further effects of soil manipulations with wood chips and fertilizer on traffic lanes. In thinned stands: (i) the harvested trees were chipped, and spread onto traffic lanes followed by sub-soiling and rototilling, (ii) same as (i) but traffic lanes also received N and P with the chips prior to the sub-soiling, (iii) traffic lanes were sub-soiled, then thinning chips were returned to just the surface of traffic lanes, and (iv) same as (iii) but traffic lanes also received N and P fertilizer with the chips. Tree height and diameter were measured three times, starting immediately following treatments and again at 5 and 15 years post-treatment. In addition, soil bulk density was measured at 6 years and soil chemistry (C, N, and P) was measured at 6 and 16 years. Our results indicate: (1) thinning by itself with no subsoiling did not compact the soils, but increased growth rate of residual trees, although the periodic annual increment of basal area and volume was still higher in the control than other main-plot treatments; (2) neither subsoiling nor rototilling, both of which might mitigate soil compaction, enhanced tree growth; (3) short-term plantation growth was not improved with chip returns or chips with fertilization; (4) since thinning and soil treatments showed more insect damage and higher mortality, any management operations that involve cutting or damaging trees or roots should be avoided during active periods of bark beetle flight; (5) both thinning and soil treatments did not reduce carbon sequestration in the mineral soils. A lack of growth benefits from returning thinning chips, rototilling, and direct fertilization for a longer period appeals to further study. © 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64979
Appears in Collections: 影响、适应和脆弱性
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作者单位: USDA Forest Service, Pacific Southwest Research Station, 3644 Avtech Parkway, Redding, CA, United States; 7205 Granada Dr., Redding, CA, United States; USDA Forest Service, Pacific Southwest Region, 3644 Avtech Parkway, Redding, CA, United States
Recommended Citation:
Zhang J.,Webster J.,Young D.H.,et al. Effect of thinning and soil treatments on Pinus ponderosa plantations: 15-year results[J]. Forest Ecology and Management,2016-01-01,368