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Nitrogen use per ha - Derogation farms

Lower nitrogen fertilisation in 2019
20/07/2022

The use of nitrogen-containing fertilisers from livestock manure on farms in the derogation monitoring network decreased by 15 kg/ha in 2019 compared to 2018 and amounted to 230 kg/ha. The use of inorganic nitrogen-containing fertilisers in 2019 was 126 kg/ha.

68% nitrogen fertilisation from livestock manure
In the period 2006 to 2019, the use of nitrogen-containing fertilisers from livestock manure on farms in the derogation monitoring network varied from 230 to 246 kg/ha. In 2017 and 2018, the use of nitrogen-containing fertilisers from livestock manure was still at the top of this range with 242 and 246 kg/ha respectively, but in 2019 it fell to the bottom of this range with 230 kg/ha. The use of inorganic nitrogen-containing fertilisers in 2019 increased slightly by 126 kg/ha compared to 2018 (122 kg/ha), but is still at a lower level than in the period 2014 to 2017. The total use of nitrogen fertilisation per hectare existed in 2019 on average for more than 64% from livestock manure and more than 35% from inorganic fertilisers.

The Clay Region is the region where the share of nitrogen from livestock manure was the lowest in all years. This was partly due to the higher total fertilisation level in the Clay Region (2019: 383 kg nitrogen per hectare compared to 357 kg/ha at all farms in the derogation monitoring network), while the application of livestock manure was limited by the livestock manure application standard. The additional nitrogen fertilisation could then only be applied from inorganic fertilisers. In all regions, there was hardly any nitrogen fertilisation from other organic fertilisers. Total nitrogen fertilisation in 2019 was lowest in the Loess Region with 308 kg/ha and the Sand-250 Region with 337 kg/ha, followed by the Sand-230 and Peat Region with 341 and 354 kg/ha respectively. Total nitrogen fertilisation was the highest in the Clay Region with 383kg/ha.



Capacity for nitrogen application again underused in 2019
The difference between nitrogen use and the nitrogen use standard decreased sharply, especially in the years 2006 to 2009. In 2006 it was still 66 kg/ha, in the period 2009 to 2017 this varied from 18 to 29 kg/ha. The decrease in the difference is on the one hand due to a decrease in the capacity for nitrogen application in the period 2006-2013 from 293 to 263 kg/ha. This is the result of higher legal efficiency coefficients for manure on dairy farms with grazing and partly due to the tightening of the nitrogen application standards over time. After 2013, the nitrogen application capacity increased again to around 280 kg/ha. One reason for this is a higher share of grassland from 2014 as a result of an adjustment of the derogation conditions (from a minimum of 70 to a minimum of 80% grass in the cropping plan). Grassland has a higher nitrogen utilisation standard than other crops. On the other hand, the decreasing difference between the nitrogen application capacity and the nitrogen use is the result of an increase in the total use of active nitrogen in the period 2006-2017 to 261 kg/ha. In 2018, the difference between nitrogen use and the nitrogen use standard increased again to 36 kg/ha and in 2019 to 43 kg/ha. In 2018, due to less fertile conditions due to dry weather, nitrogen fertiliser fertilisation was reduced. In 2019, a lower nitrogen production from livestock manure, which is not compensated by more nitrogen input via livestock manure, was the main reason for the increased underuse of the nitrogen application standard.


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Marga Hoogeveen
+3170-3358325
 

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