Phosphorus availability from the solid fraction of pig slurry is altered by composting or thermal treatment

被引：77
作者：
Christel, Wibke [1 ]
Bruun, Sander [1 ]
Magid, Jakob [1 ]
Jensen, Lars Stoumann [1 ]
机构：
[1] Univ Copenhagen, Dept Plant & Environm Sci, DK-1871 Frederiksberg C, Denmark
来源：
BIORESOURCE TECHNOLOGY | 2014年 / 169卷
关键词：
Digestate compost; Manure char; Slow pyrolysis; Combustion; Diffusive gradients in thin films (DGT); PYROLYSIS TEMPERATURE; INCINERATION TEMPERATURE; ANIMAL MANURE; BIOCHAR; PHOSPHATE; SOILS; PLANT; KINETICS; RELEASE;
D O I：
10.1016/j.biortech.2014.07.030
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The alteration of easily available phosphorus (P) from the separated solid fraction of pig slurry by composting and thermal processing (pyrolysis or combustion at 300-1000 degrees C) was investigated by water and acidic extractions and the diffusive gradients in thin films (DGT) technique. Temporal changes in P availability were monitored by repeated DGT application in three amended temperate soils over 16 weeks. P availability was found to decrease in the order: drying > composting > pyrolysis > combustion with increasing degree of processing. Water extractions suggested that no P would be available after pyrolysis above 700 degrees C or combustion above 400 degrees C, respectively, but during soil incubation, even char and ash, processed at 800 degrees C, increased P availability. Low-temperature pyrolysis vs. combustion was found to favor P availability as did application to acidic vs. neutral soil. Composting and thermal treatment produced a slow-release P fertilizer, with P availability being governed by abiotic and biotic mechanisms. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：543 / 551
页数：9
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