Anaerobic co-digestion of dairy cattle slurry and agro-industrial fats: Effect of fat ratio on the digester efficiency

2014 ◽  
Vol 93 (2) ◽  
pp. 304-308 ◽  
Author(s):  
Sébastien Guillaume ◽  
Thomas Lendormi
Keyword(s):  
Dairy Cattle ◽  
Cattle Slurry ◽  
Dairy Cattle Slurry

Denitrification and nitrate leaching during the fall and winter following dairy cattle slurry application

1997 ◽  
Vol 77 (2) ◽  
pp. 231-240 ◽  
Author(s):  
J. W. Paul ◽  
B. J. Zebarth
Keyword(s):  
Dairy Cattle ◽  
Soil Profile ◽  
High Water ◽  
High Rate ◽  
Cattle Slurry ◽  
Manure Application ◽  
Total N ◽  
Acetylene Blockage Technique ◽  
Acetylene Blockage ◽  
Dairy Cattle Slurry

Conditions in soils of south-coastal British Columbia during the fall and winter favor both NO3− leaching and denitrification. Estimates of NO3− leaching were made on a coarse-textured soil having a high water table (Sumas) and a well-drained, medium-textured soil (Agassiz) in each of 1991 and 1992, following application of 0, 300 and 600 kg total N ha−1 as dairy cattle slurry at the end of September. Leaching was calculated by measuring NH4+ and NO3− concentrations biweekly to 90 cm depth and subtracting denitrification losses. Denitrification estimates were made using the acetylene blockage technique on intact cores taken to 43 cm depth at biweekly intervals from the 0 and 600 kg N ha−1 treatments. Most of the NO3− disappeared from the 90 cm soil profile by January in both years. At the high rate of manure application, denitrification losses were 29 and 20 kg N ha−1 at Agassiz in 1991 and 1992, and 48 and 17 kg N ha−1 at Sumas in 1991 and 1992, respectively. Denitrification losses in the non-manured treatments ranged from 3 to 16 kg N ha−1 Significant denitrification losses occurred at the 15- to 28-cm and the 30-cm to 43-cm depths, indicating that denitrification measurements at these depths are important. Leaching losses ranged from 60 to 188 kg N ha−1 from the control treatments, and from 102 to 241 kg N ha−1 following the highrate of manure application. Denitrification accounted for up to 17% of the NO3− loss from the soil profile, indicating that the majority of the NO3− was leached. Key words: Acetylene blockage technique, denitrification rate, air-filled porosity, manure

Increased denitrification below the root zone in the fall following a spring manure application

1997 ◽  
Vol 77 (2) ◽  
pp. 249-251 ◽  
Author(s):  
J. W. Paul ◽  
V. Etches ◽  
B. J. Zebarth
Keyword(s):  
Dairy Cattle ◽  
Shallow Water ◽  
Key Words ◽  
Water Table ◽  
Soil Profile ◽  
Root Zone ◽  
Cattle Slurry ◽  
Shallow Water Table ◽  
Indirect Measurements ◽  
Dairy Cattle Slurry

Indirect measurements of denitrification to 120 cm depth in a coarse textured soil in October showed higher denitrification rates following a single spring application of dairy cattle slurry than following a spring application of fertilizer. The highest denitrification rates occurred immediately above and below the water table (90 cm depth) and resulted primarily from C applied in the manure moving down through the soil profile. Key words: Dairy cattle slurry, carbon, nitrate, shallow water table

Nitrogen recovery by timothy from surface application of dairy cattle slurry

1993 ◽  
Vol 24 (11-12) ◽  
pp. 1139-1151 ◽  
Author(s):  
M. A. Anderson ◽  
J. R. McKenna ◽  
D. C. Martens ◽  
S. J. Donohue
Keyword(s):  
Dairy Cattle ◽  
Nitrogen Recovery ◽  
Cattle Slurry ◽  
Surface Application ◽  
Dairy Cattle Slurry

The cumulative methane production from dairy cattle slurry can be explained by its volatile solid, temperature and length of storage

2015 ◽  
Vol 87 (6) ◽  
pp. 827-834 ◽  
Author(s):  
Takuji Sawamoto ◽  
Megumi Nakamura ◽  
Kenji Nekomoto ◽  
Shinji Hoshiba ◽  
Keiko Minato ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Methane Production ◽  
Volatile Solid ◽  
Cattle Slurry ◽  
Solid Temperature ◽  
Dairy Cattle Slurry

Availability of manure slurry ammonium for corn using 15N-labelled (NH4)2SO4

1995 ◽  
Vol 75 (1) ◽  
pp. 35-42 ◽  
Author(s):  
J. W. Paul ◽  
E. G. Beauchamp
Keyword(s):  
Dairy Cattle ◽  
N Uptake ◽  
Animal Manure ◽  
N Recovery ◽  
Cattle Slurry ◽  
Fertilized Soil ◽  
Key Words Animal ◽  
Apparent N Recovery ◽  
Manure Slurry ◽  
Dairy Cattle Slurry

The NH4+ fraction of animal manure slurry is often considered to be as available as fertilizer N to a crop; however, immobilization and losses via denitrification and NH3 volatilization may be higher in manured than in fertilized soil. The apparent N recovery and the 15N recovery methods were used for corn (Zea mays L.) grown in soil amended with dairy cattle slurry and NH4+ fertilizer to determine the source of the N taken up by corn plants. Manure slurry or (NH4)2SO4 fertilizer were applied at rates equivalent to 100 kg NH4+–N ha−1 in the greenhouse and the field. In the greenhouse, the apparent NH4+–N uptake by corn was 76 and 85% with animal manure slurries and NH4+ fertilizer, respectively. In the field, apparent N recovery of NH4+ from dairy cattle slurry and (NH4)2SO4 was 43 and 58%, respectively, whereas 15N recovery from the same treatments was 15 and 29%, respectively. The lower 15N recovery values compared with the apparent recovery values suggest that mineralization-immobilization turnover (MIT) occurred, and that MIT was greater in manured soil than in fertilized soil. A laboratory incubation study showed greater microbial biomass and more 15N immobilization in soil amended with dairy cattle slurry than in soil amended with fertilizer. Key words: Animal manure slurry, nitrogen, corn, N recovery, 15N microplots

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