Very Low Nitrogen Leaching in Grazed Ley-Arable-Systems in Northwest Europe
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Site Description
2.2. Experimental Layout and Treatments
2.3. NO3-Leachate Analysis
2.4. Forage Yield and Quality
2.5. Field-N-Balance
2.6. Weather Data and Water Drainage
2.7. Statistical Analyses
3. Results
3.1. Nitrogen Leaching
3.2. Herbage and Nitrogen Yield
3.3. Nitrogen Balance
4. Discussion
4.1. Nitrogen Leaching Losses
4.2. Field-N-Balance
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Nr | System | Sward Age (Years) | Management | Fertilization (kg N ha−1) | Abbreviation |
---|---|---|---|---|---|
1 | permanent grassland | >20 | 4× silage cuts | 0 | PG |
2 | 240 | PG240N * | |||
3 | grass- clover- ley | 1 | 5× silage cuts | 0 | GC 1y |
4 | 0 *** | 2× grazed | 0 | GC 0y | |
5 | 1 | 8× grazed, 1× silage cut | 0 | GC 1y grazed | |
6 | 2 | 0 | GC 2y grazed | ||
7 | cover crop | 0 * | 2× grazed | 60 | CC 60N grazed ** |
Year | January | February | March | April | May | June | July | August | September | October | November | December | Total |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Precipitation (mm) | |||||||||||||
2017 | 80 | 57 | 51 | 47 | 42 | 116 | 102 | 61 | 75 | 124 | 91 | 82 | 928 |
2018 | 96 | 23 | 45 | 74 | 24 | 32 | 8 | 66 | 39 | 40 | 20 | 64 | 531 |
2019 | 41 | 39 | 94 | 22 | 61 | 74 | 54 | 48 | 100 | 85 | 79 | 49 | 746 |
2020 | 80 | 130 | 36 | 14 | 26 | 60 | 79 | 62 | 12 | 61 | 17 | 60 | 637 |
Long-term | 67 | 51 | 52 | 38 | 50 | 64 | 83 | 78 | 62 | 74 | 65 | 71 | 754 |
Temperature (°C) | |||||||||||||
2017 | 1.3 | 2.8 | 6.5 | 7.2 | 13.3 | 16.3 | 16.7 | 16.9 | 13.9 | 12.0 | 6.3 | 4.2 | 9.8 |
2018 | 3.4 | −0.2 | 1.7 | 9.8 | 14.8 | 16.8 | 19.8 | 18.6 | 14.6 | 11.5 | 6.4 | 5.2 | 10.2 |
2019 | 2.1 | 5.2 | 6.4 | 8.6 | 10.6 | 17.9 | 17.3 | 18.4 | 14.0 | 10.8 | 6.2 | 5.2 | 10.2 |
2020 | 5.7 | 5.7 | 5.6 | 9.0 | 11.2 | 16.6 | 15.8 | 19.7 | 14.8 | 11.3 | 7.9 | 4.4 | 10.6 |
Long-term | 1.7 | 2.2 | 4.3 | 8.1 | 12.0 | 15.3 | 17.8 | 17.6 | 14.3 | 10.0 | 5.8 | 2.9 | 9.3 |
Factor | NO3-Conc. | NO3-Leaching | N-Yield | N-Balance |
---|---|---|---|---|
S | *** | *** | *** | *** |
Y | n.s. | n.s. | *** | ** |
S × Y | *** | *** | *** | *** |
Year | PG240N | PG | GC 1y | GC_0y | GC 1y Grazed | GC 2y Grazed | CC 60N Grazed |
---|---|---|---|---|---|---|---|
N-Yield (kg N ha−1) | |||||||
2017 | 229.5 Acd (12.6) | 214.0 Ad (7.3) | 285.5 c (13.1) | 63.7 Aa (4.8) | 362.4 Be (1.2) | 363.7 Ae (6.1) | 36.9 b (1.9) |
2018 | 122.7 Bd (5.3) | 123.4 Bd (10.3) | 288.8 e (8.7) | 23.9 Bb (2.0) | 378.4 Ba (8.8) | 284.6 Be (10.1) | 46.4 c (2.9) |
2019 | 160.2 Cb (9.2) | 159.0 Bb (9.2) | 316.4 a (2.9) | 38.8 Cd (1.5) | 440.8 Ac (16.0) | 443.0 Cc (8.9) | 38.5 d (0.7) |
PG240N | PG | GC 1y | GC 0y | GC 1y Grazed | GC 2y Grazed | CC 60N Grazed | |
---|---|---|---|---|---|---|---|
Yearly Inputs (kg N ha−1) | |||||||
2017 | 355.5 (5.7) | 222.8 (8.5) | 383.5 (18.9) | 58.0 (5.1) | 379.1 (12.2) | 277.9 (5.1) | 60.0 * |
2018 | 278.9 (3.0) | 121.6 (9.5) | 358.7 (26.0) | 24.6 (3.1) | 374.2 (18.7) | 159.0 (11.9) | 60.0 * |
2019 | 305.7 (4.8) | 165.3 (9.5) | 404.0 (5.8) | 38.6 (1.3) | 479.1 (19.5) | 373.2 (3.4) | 60.0 * |
Yearly Outputs (kg N ha−1) | |||||||
2017 | 221.8 Ae (12.2) | 206.7 Ae (7.0) | 285.5 a (13.1) | 17.6 Ab (1.3) | 118.4 Bd (1.4) | 123.7 Ad (2.9) | 10.3 c (0.5) |
2018 | 118.5 Be (5.1) | 119.2 Bde (10.0) | 288.8 c (8.7) | 6.6 Ba (0.6) | 125.8 Be (5.2) | 95.4 Bd (4.4) | 12.9 b (0.8) |
2019 | 153.3 Cc (9.8) | 150.9 Bc (10.1) | 316.4 a (2.9) | 10.8 Cb (0.4) | 161.2 Ac (5.9) | 159.4 Cc (2.9) | 10.7 b (0.2) |
N-balance (Inputs-Outputs) (kg N ha−1) | |||||||
2017 | 133.7 Acd (8.3) | 15.8 b (4.1) | 98.0 c (8.3) | 40.4 Ae (3.9) | 260.7 Ba (11.8) | 154.1 Ad (3.0) | 49.7 e (0.5) |
2018 | 160.4 Bb (2.2) | 2.4 d (4.9) | 69.9 ce (19.0) | 17.9 Bcd (2.5) | 248.4 Ba (14.7) | 63.7 Be (7.7) | 47.1 e (0.8) |
2019 | 152.3 Abd (7.3) | 14.4 b (2.5) | 87.6 c (8.7) | 27.8 Cf (0.9) | 317.9 Aa (13.9) | 213.8 Ce (4.6) | 49.3 g (0.2) |
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Smit, H.P.J.; Reinsch, T.; Kluß, C.; Loges, R.; Taube, F. Very Low Nitrogen Leaching in Grazed Ley-Arable-Systems in Northwest Europe. Agronomy 2021, 11, 2155. https://doi.org/10.3390/agronomy11112155
Smit HPJ, Reinsch T, Kluß C, Loges R, Taube F. Very Low Nitrogen Leaching in Grazed Ley-Arable-Systems in Northwest Europe. Agronomy. 2021; 11(11):2155. https://doi.org/10.3390/agronomy11112155
Chicago/Turabian StyleSmit, Hendrik P. J., Thorsten Reinsch, Christof Kluß, Ralf Loges, and Friedhelm Taube. 2021. "Very Low Nitrogen Leaching in Grazed Ley-Arable-Systems in Northwest Europe" Agronomy 11, no. 11: 2155. https://doi.org/10.3390/agronomy11112155