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

被引：78

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

页码：543 / 551

页数：9

共 34 条

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