|Phosphate soil surplus per ha - Derogation farms
Phosphate soil surplus decreased in 2019
|In 2019, the phosphate soil surplus decreased again to an average of 5 kg/ha on farms in the derogation monitoring network. In 2018, the phosphate soil surplus was still 16 kg/ha. At that time, the phosphate soil surplus was incidentally high as a result of dry weather conditions, resulting in low phosphate extraction via crop production. In the previous two years, the phosphate soil surplus fluctuated around 0 kg/ha, so that the phosphate fertilisation per hectare was approximately equal to the phosphate extraction via crop production, or equilibrium fertilisation.
Declining phosphate soil surplus
Over the entire period 2006-2019, the phosphate soil surplus shows a downward trend. In 2019, an average phosphate soil surplus of 5 kg/ha was achieved. In 2014, the average phosphate output per hectare on farms in the derogation monitoring network was for the first time greater than the average phosphate input, so that the phosphate soil surplus was negative (-6 kg/ha) and so net phosphate was extracted from the soil. In 2016 and 2017, the average phosphate soil surplus was just below the level of equilibrium fertilisation with values of -2 and -1 kg/ha respectively. In 2018, the phosphate surplus increased to 16 kg/ha as a result of dry weather conditions, which meant that more feed had to be purchased and there was less stockpiling of roughage. For all years, the spread in the phosphate soil surplus per hectare was large. In 2019, the 25% farms with the lowest soil surpluses had a surplus of less than -9 kg/ha, while the 25% farms with the highest surpluses had a surplus of more than 14 kg/ha.
The phosphate soil surplus was highest in 2019 in the Sand-250 Region with an average of 8 kg/ha, followed by the Peat Region with 5 kg/ha and the Sand-230 and Clay Region with both 4 kg/ha. Only the Loess Region had a negative phosphate soil surplus in 2019 (-2 kg/ha).
Feed largest phosphate input item, input phosphate fertiliser to 0
In all years, the phosphate supply to farms in the derogation monitoring network consisted largely of feed supply. In 2019, the average was over 68 kg/ha. The contribution of fertilisers, organic manure, animals and plant products to the total phosphate input was small, with a total of more than 6 kg/ha in 2019. The total phosphate input amounted to 74 kg/ha in 2019, 10 kg/ha less than in 2018. This decrease is entirely the result of less phosphate input via feed. The total input of phosphate in 2019 was highest in the Sand-230 region with 91 kg/ha. The supply in the other regions varied from 63 to 69 kg/ha.
The use of phosphate fertilisers has fallen to 0 kg/ha. In 2006, an average of 11 kg of phosphate fertiliser was used per hectare; in 2009 this had fallen to 3 kg/ha and since 2015 this has been 0 kg/ha. By tightening the phosphate usage standards, the farms in the derogation monitoring network have increasingly opted to fill the capacity for phosphate application with animal manure. As of 2014, the use of phosphate containing fertilisers is no longer permitted on derogation farms. 2014 was a transition year in which use was still possible under certain conditions.
Phosphate output in 2019 almost equal to 2018
Phosphate output takes place in the form of animal products, organic manure, animals and plant products. Over the entire period 2006-2019, there is an increasing trend in the total phosphate output from farms in the derogation monitoring network. Especially in the years 2014 to 2016, the total phosphate output was high with 80 to 81 kg/ha for all farms in the derogation monitoring network compared to most other years. In 2018, the total phosphate output decreased to 69 kg/ha and remained at that level in 2019 with 70 kg/ha. This decrease was mainly the result of less output from both organic manure and plant products.
The total phosphate output in 2019 was by far the highest in the Sand-230 Region with 87 kg/ha in 2019. This was followed by the Loess Region with 71 kg/ha, the Clay Region with 66 kg/ha and the Peat Region with 61 kg/ha. In the Sand-250 Region, the total phosphate output in 2019 was the lowest with 56 kg/ha.