Acidified Animal Manure Products Combined with a Nitrification Inhibitor Can Serve as a Starter Fertilizer for Maize
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Acidified Animal Manure Products Combined with a Nitrification Inhibitor Can Serve as a Starter Fertilizer for Maize. / Regueiro, Iria; Siebert, Peter; Liu, Jingna; Müller-Stöver, Dorette; Jensen, Lars Stoumann.
In: Agronomy, Vol. 10, No. 12, 1941, 2020.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - Acidified Animal Manure Products Combined with a Nitrification Inhibitor Can Serve as a Starter Fertilizer for Maize
AU - Regueiro, Iria
AU - Siebert, Peter
AU - Liu, Jingna
AU - Müller-Stöver, Dorette
AU - Jensen, Lars Stoumann
PY - 2020
Y1 - 2020
N2 - There is an urgent need for better management practices regarding livestock farm nutrient imbalances and for finding alternatives to the actual use of mineral fertilizers. Acidification of animal manure is a mitigation practice used to reduce ammonia emissions to the atmospheric environment during manure storage and land application. Acidification modifies manure physicochemical characteristics, among which soluble N and P significantly increase. The main objective of this study was to investigate if acidification and the addition of a nitrification inhibitor to manure and placement of the treated manure close to the seed can stimulate maize growth by enhancing nutrient availability, specially P and consequently plant P uptake, at early development stages without the use of mineral N and P as a starter fertilizer. Raw dairy slurry and solid fractions from dairy slurry and digestate from a biogas plant were acidified to pH 5.5 and applied with or without a nitrification inhibitor (DMPP, 3,4-dimethyl pyrazole phosphate) to maize in a pot experiment, where biomass productivity, nutrient uptake and soil P availability were examined. Acidification increased the water-extractable P fraction of all slurry and digestate organic residues (by 20-61% of total P) and consequently plant P uptake from solid fractions of both slurry and digestate compared to the untreated products (by 47-49%). However, higher plant biomass from acidification alone was only achieved for the slurry solid fraction, while the combination of acidification and DMPP also increased plant biomass in the digestate solids treatment (by 49%). We therefore conclude that the combination of acidification and a nitrification inhibitor can increase the starter fertilizer value of slurry and digestate products sufficiently to make them suitable as a maize starter fertilizer.
AB - There is an urgent need for better management practices regarding livestock farm nutrient imbalances and for finding alternatives to the actual use of mineral fertilizers. Acidification of animal manure is a mitigation practice used to reduce ammonia emissions to the atmospheric environment during manure storage and land application. Acidification modifies manure physicochemical characteristics, among which soluble N and P significantly increase. The main objective of this study was to investigate if acidification and the addition of a nitrification inhibitor to manure and placement of the treated manure close to the seed can stimulate maize growth by enhancing nutrient availability, specially P and consequently plant P uptake, at early development stages without the use of mineral N and P as a starter fertilizer. Raw dairy slurry and solid fractions from dairy slurry and digestate from a biogas plant were acidified to pH 5.5 and applied with or without a nitrification inhibitor (DMPP, 3,4-dimethyl pyrazole phosphate) to maize in a pot experiment, where biomass productivity, nutrient uptake and soil P availability were examined. Acidification increased the water-extractable P fraction of all slurry and digestate organic residues (by 20-61% of total P) and consequently plant P uptake from solid fractions of both slurry and digestate compared to the untreated products (by 47-49%). However, higher plant biomass from acidification alone was only achieved for the slurry solid fraction, while the combination of acidification and DMPP also increased plant biomass in the digestate solids treatment (by 49%). We therefore conclude that the combination of acidification and a nitrification inhibitor can increase the starter fertilizer value of slurry and digestate products sufficiently to make them suitable as a maize starter fertilizer.
KW - phosphorus
KW - nitrogen
KW - animal manure
KW - manure solids
KW - digestate
KW - DMPP
KW - ROOT-ZONE TEMPERATURES
KW - SLURRY ACIDIFICATION
KW - PIG SLURRY
KW - PHOSPHORUS
KW - AVAILABILITY
KW - SEPARATION
KW - NITROGEN
KW - PLACEMENT
KW - INJECTION
KW - DIGESTION
U2 - 10.3390/agronomy10121941
DO - 10.3390/agronomy10121941
M3 - Journal article
VL - 10
JO - Agronomy
JF - Agronomy
SN - 2073-4395
IS - 12
M1 - 1941
ER -
ID: 255112073