DOI: 10.1007/s10533-017-0379-9
Scopus记录号: 2-s2.0-85029578641
论文题名: Soil biochemical properties and crop productivity following application of locally produced biochar at organic farms on Waldron Island, WA
作者: Gao S. ; Hoffman-Krull K. ; DeLuca T.H.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 136, 期: 1 起始页码: 31
结束页码: 46
语种: 英语
英文关键词: Biochar
; Crop productivity
; Multivariate analyses
; Organic farms
; Soil available phosphorus
; Soil fertility
Scopus关键词: biochemistry
; charcoal
; crop production
; enzyme activity
; microbial activity
; multivariate analysis
; nutrient uptake
; organic farming
; phosphatase
; poultry
; soil chemistry
; soil fertility
; San Juan Islands
; United States
; Waldron Island
; Washington [United States]
; Cucurbita maxima
英文摘要: Biochar (a carbon-rich product from pyrolysis of organic materials) additions to agricultural soils have been shown to often result in neutral to positive influences on soil properties and processes; however, the only a limited number of studies have been conducted on active organic farming systems and of those, none have used multivariate analytical methods to examine the influence of biochar on soil microbial activity, nutrient cycling, and crop performance. In this study, biochar produced from local timber harvest residues on Waldron Island, WA was applied in factorial combination with a poultry litter based fertilizer to replicated plots on six organic farms that were all growing Kabocha squash (Cucurbita maxima) in the summer of 2016. A series of soil physicochemical and biochemical properties were examined after 5 months of biochar application; squash samples were evaluated for productivity and nutrient uptake. Factorial multivariate analysis of variance (MANOVA) revealed a significant influence of biochar on soil properties as well as a synergistic effect of biochar and poultry litter during a 5 month field trial. Principle component analysis (PCA) highlighted soil total C content, microbial biomass C, enzyme activities, bioavailable P, and phosphatase enzyme activity as the variables most influenced by biochar incorporation into surface mineral soil. Redundancy analysis (RDA) further indicated that better soil biochemical conditions, particularly soil enzyme activities and available P concentrations, were associated with higher crop productivity in biochar-treated plots. Overall, our study demonstrates that locally produced wood biochar, in addition to improving soil C storage, has the potential to significantly improve soil fertility and crop productivity in organic farming systems on sandy soils. © 2017, Springer International Publishing AG. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83224
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: School of Environmental and Forest Sciences, University of Washington, Seattle, WA, United States; Forage, Waldron Island, WA, United States; College of Forestry and Conservation, University of Montana, Missoula, MT, United States
Recommended Citation:
Gao S.,Hoffman-Krull K.,DeLuca T.H.. Soil biochemical properties and crop productivity following application of locally produced biochar at organic farms on Waldron Island, WA[J]. Biogeochemistry,2017-01-01,136(1)