Cultivation of silage maize, winter wheat and winter rape under the influence of omitted fertilisation

Influence of omitted fertilisation with the nutrients nitrogen (N), phosphorus (P) and potassium (K) as well as the influence of omitted liming.

There are six experimental variants with different mineral fertilisation:

Variant 1:
full fertilisation
Variant 2:
without N
Variant 3:
without P
Variant 4:
without K
Variant 5:
without lime
Variant 6:
no fertilisation

The trial is embedded in a three-field crop rotation:

Silage Maize
Winter wheat
Winter rape

Cultivation overview 2025/26 - Block 1 - Winter Wheat

Cultivation overview 2025/26 - Block 2 - Winter rape

Variant 4 - without potassium

Anbau 2025/2026

Type         VarietyGrains/m²TKGKFxFA %Seed rate kg/haMeasuresFertilisationPlant protection

Winter rape (Hybrid)

KWS Ambos555,1379,93,0

Sowing: 26.08.2025

Germination:  

17.03.2020 30 kg P/ha (Triple-Superphosphat 45%)

02.08.2021 600 kg/ha CaO (Carbokalk 27%)

03.08.2021 30 kg P/ha (Triple-Superphosphat 45%)

07.09.2023 60 kg P/ha (Triple-Superphosphat 45%) 600 kg CaO/ha (Kohlensaurer Kalk 45%)

28.03.2025  60 kg N/ha (KAS 27%)

23.04.2025  40 kg N/ha (Entec 26%)

 

stained with: Scenic Gold, Lumiposa

 

Variant 5 - without lime

Cultivation 2025/2026

Type        VarietyGrains/m²TKGKFxFA %Seed rate kg/haMeasuresFertilisationPlant protection
Winter rape (Hybrid)KWS Ambos555,1379,93,0

Sowing: 26.08.2025

Germination: 

17.03.2020 30 kg P/ha (Triple-Superphosphat 45%) 30 kg K/ha (Korn-Kali 60%)

03.08.2021 30 kg P/ha (Triple-Superphosphat 45%) 30 kg K/ha (Korn-Kali 60%)

07.09.2023 60 kg P/ha (Triple-Superphosphat 45%) 40 kg K/ha (Korn-Kali 60%)

28.03.2025  60 kg N/ha (KAS 27%)

23.04.2025  40 kg N/ha (Entec 26%)

stained with: Scenic Gold, Lumiposa

Variant 3 - without phosphorus

Cultivation 2025/2026

Type       VarietyGrains/m²TKGKFxFA %Seed rate kg/haMeasuresFertilisationPlant protection
Winter rape (Hybrid)KWS Ambos555,379,93,0

Sowing: 26.08.2025

Germination: 

17.03.2020 30 kg K/ha (Korn-Kali 60%)

02.08.2021 600 kg/ha (Carbokalk 27%)

03.08.2021 30 kg K/ha (Korn-Kali 60%)

07.09.2023 40 kg K/ha (Korn-Kali 60%) 600 kg CaO/ha (Kohlensaurer Kalk 45%)

28.03.2025  60 kg N/ha (KAS 27%)

23.04.2025  40 kg N/ha (Entec 26%)

stained with: Scenic Gold, Lumiposa

Variant 6 - no fertilisation

Cultivation 2025/2026

Type              VarietyGrains/m²TKGKFxFA %Seed rate kg/haMeasuresPlant protection
Winter rape (Hybrid)KWS Ambos555,1379,93,0

Sowing: 26.08.2025

Germination: 

stained with: Scenic Gold, Lumiposa

Variant 1 - Full fertilisation

Cultivation 2025/2026

Type      VarietyGrains/m²TKGKFxFA %Seed rate kg/haMeasuresFertilisationPlant protection

Winter rape (Hybrid)

KWS Ambos555,1379,93,0

Sowing: 26.08.2025

Germination: 

17.03.2020 30 kg P/ha (Triple-Superphosphat 45%) 30 kg K/ha (Korn-Kali 60%)

02.08.2021 600 kg/ha (Carbokalk 27%)

03.08.2021 30 kg P/ha (Triple-Superphosphat 45%) 30 kg K/ha (Korn-Kali 60%)

07.09.2023 60 kg P/ha (Triple-Superphosphat 45%) 40 kg K/ha (Korn-Kali 60%) 600 kg CaO/ha (Kohlensaurer Kalk 45%)

28.03.2025  60 kg N/ha (KAS 27%)

23.04.2025  40 kg N/ha (Entec 26%)

stained with: Scenic Gold, Lumiposa

Variant 2 - without nitrogen

Cultivation 2025/2026

Type             VarietyGrains/m²TKGKFxFA %Seed rate kg/haMeasuresFertilisationPlant protection
Winter rape (Hybrid)KWS Ambos555,1379,93,0

Sowing: 26.089.2025

Germination: 

17.03.2020 30 kg P/ha (Triple-Superphosphat 45%) 30 kg K/ha (Korn-Kali 60%)

02.08.2021 600 kg/ha (Carbokalk 27%)

03.08.2021 30 kg P/ha (Triple-Superphosphat 45%) 30 kg K/ha (Korn-Kali 60%)

07.09.2023 60 kg P/ha (Triple-Superphosphat 45%) 40 kg K/ha (Korn-Kali 60%) 600 kg CaO/ha (Kohlensaurer Kalk 45%)

stained with: Scenic Gold, Lumiposa

Cultivation overview 2025/26 - Block 3 - Maize