Analysis of the significant drop in protein content in Danish grain crops from 1990-2015 based on N-response in fertilizer trials
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Analysis of the significant drop in protein content in Danish grain crops from 1990-2015 based on N-response in fertilizer trials. / Styczen, Merete Elisabeth; Abrahamsen, Per; Hansen, Søren; Knudsen, Leif.
I: European Journal of Agronomy, Bind 115, 126013, 2020.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Analysis of the significant drop in protein content in Danish grain crops from 1990-2015 based on N-response in fertilizer trials
AU - Styczen, Merete Elisabeth
AU - Abrahamsen, Per
AU - Hansen, Søren
AU - Knudsen, Leif
PY - 2020
Y1 - 2020
N2 - A significant drop of 2.4-2.9 percentage-points (%-p) in crude protein content (on dry matter basis) in Danish grain crops was observed from around 1990 to 2015. The aim of the analysis was to quantify the effect of the change in N-response of varieties of winter wheat (WW) and spring barley (SB) under farmers’ conditions based on approx. 1000 fertilizer trials with WW and 500 with SB carried out in farmers’ fields from 1987 to 2015. Results indicated that for WW receiving 129-190 kg N/ha, DM yield increased 0.8-0.9 Mg/ha. The amount of harvested N in grain increased 5-11 kg N/ha, and % N in grain dropped by 0.1-0.05 %-points; the largest drop was found for low N-additions. For SB, receiving 93-129 kg N/ha, DM yield increased by 0.9-1.1 Mg/ha. The amount of harvested N in grain increased by 4-6 kg while the N % in grain dropped 0.2-0.24 %-points. For both crops, the effect of plant breeding is likely to be confounded with the effect of increased CO2. Adding up effects of changed N-response and fertilizer rates only explained part of the observed reduction in crude protein content.
AB - A significant drop of 2.4-2.9 percentage-points (%-p) in crude protein content (on dry matter basis) in Danish grain crops was observed from around 1990 to 2015. The aim of the analysis was to quantify the effect of the change in N-response of varieties of winter wheat (WW) and spring barley (SB) under farmers’ conditions based on approx. 1000 fertilizer trials with WW and 500 with SB carried out in farmers’ fields from 1987 to 2015. Results indicated that for WW receiving 129-190 kg N/ha, DM yield increased 0.8-0.9 Mg/ha. The amount of harvested N in grain increased 5-11 kg N/ha, and % N in grain dropped by 0.1-0.05 %-points; the largest drop was found for low N-additions. For SB, receiving 93-129 kg N/ha, DM yield increased by 0.9-1.1 Mg/ha. The amount of harvested N in grain increased by 4-6 kg while the N % in grain dropped 0.2-0.24 %-points. For both crops, the effect of plant breeding is likely to be confounded with the effect of increased CO2. Adding up effects of changed N-response and fertilizer rates only explained part of the observed reduction in crude protein content.
KW - Det Natur- og Biovidenskabelige Fakultet
KW - Winter wheat
KW - spring barley
KW - Protein content
KW - Plant breeding
KW - Fertilization
U2 - 10.1016/j.eja.2020.126013
DO - 10.1016/j.eja.2020.126013
M3 - Tidsskriftartikel
VL - 115
JO - European Journal of Agronomy
JF - European Journal of Agronomy
SN - 1161-0301
M1 - 126013
ER -
ID: 237243939