TY - JOUR
T1 - Assessment of Two Solid Anaerobic Digestate Soil Amendments for Effects on Soil Quality and Biosolarization Efficacy
AU - Fernández-Bayo, Jesús D.
AU - Achmon, Yigal
AU - Harrold, Duff R.
AU - McCurry, Dlinka G.
AU - Hernandez, Katie
AU - Dahlquist-Willard, Ruth M.
AU - Stapleton, James J.
AU - VanderGheynst, Jean S.
AU - Simmons, Christopher W.
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/5/3
Y1 - 2017/5/3
N2 - Anaerobic digestion is an organic waste bioconversion process that produces biofuel and digestates. Digestates have potential to be applied as soil amendment to improve properties for crop production including phytonutrient content and pest load. Our objective was to assess the impact of solid anaerobic digestates on weed seed inactivation and soil quality upon soil biosolarization (a pest control technique that combines solar heating and amendment-induced microbial activity). Two solid digestates from thermophilic (TD) and mesophilic (MD) digesters were tested. The solarized TD-amended samples presented significantly higher mortality of Brassica nigra (71%, P = 0.032) than its equivalent incubated at room temperature. However, biosolarization with digestate amendment led to decreased weed seed mortality in certain treatments. The plant-available water, total C, and extractable P and K were significantly increased (P < 0.05) in the incubated amended soils. The results confirm the potential of digestates as beneficial soil amendments. Further studies are needed to elucidate the impacts of digestate stability on biosolarization efficacy and soil properties.
AB - Anaerobic digestion is an organic waste bioconversion process that produces biofuel and digestates. Digestates have potential to be applied as soil amendment to improve properties for crop production including phytonutrient content and pest load. Our objective was to assess the impact of solid anaerobic digestates on weed seed inactivation and soil quality upon soil biosolarization (a pest control technique that combines solar heating and amendment-induced microbial activity). Two solid digestates from thermophilic (TD) and mesophilic (MD) digesters were tested. The solarized TD-amended samples presented significantly higher mortality of Brassica nigra (71%, P = 0.032) than its equivalent incubated at room temperature. However, biosolarization with digestate amendment led to decreased weed seed mortality in certain treatments. The plant-available water, total C, and extractable P and K were significantly increased (P < 0.05) in the incubated amended soils. The results confirm the potential of digestates as beneficial soil amendments. Further studies are needed to elucidate the impacts of digestate stability on biosolarization efficacy and soil properties.
KW - anaerobic digestates
KW - pest control
KW - soil amendment
KW - soil biosolarization
KW - volatile fatty acids
KW - weeds inactivation
UR - http://www.scopus.com/inward/record.url?scp=85018969060&partnerID=8YFLogxK
U2 - 10.1021/acs.jafc.6b04816
DO - 10.1021/acs.jafc.6b04816
M3 - 文章
C2 - 28409935
AN - SCOPUS:85018969060
SN - 0021-8561
VL - 65
SP - 3434
EP - 3442
JO - Journal of Agricultural and Food Chemistry
JF - Journal of Agricultural and Food Chemistry
IS - 17
ER -