'nutrient surplus' is a correct and usable phrase in written English.
You could use it to refer to an abundance of nutrients in a particular ecosystem or food supply. For example, "The nutrient surplus in the soil was credited with improving the overall health of the corn crop."
When the nitrates collect in the gulf, they act as a nutrient surplus, allowing the algae living in the seawater to bloom prolifically in warm spring weather.
A reduction in young stock reduces the roughage requirements but contributes little to the reduction of the nutrient surplus.
Thus, a restoration of semi-natural water courses with temporarily inundated floodplains, and other linear landscape structures, such as dam hedges, have a variety of functions, not only as paths of migration, habitats and protection against substance transports, but also as sites of active elimination of a nutrient surplus and other substances.
Restoration, creating and connecting a variety of smaller ecosystems within a landscape not only will be an important contribution to stabilizing floristic and faunistic assemblages and to the elimination of a nutrient surplus, but will result in significant improvements to ecosystem functioning of nearby intensively cultivated landscapes.
Under conditions of nutrient surplus, Dilps are released from the IPCs [ 19].
Sophisticated behavioral assays have shown how signaling by NPF in olfactory sensory neurons couples hunger state to foraging behavior and how increased insulin signaling under conditions of nutrient surplus inhibits the motivation to feed [ 37].
In the sandy regions of the Netherlands, high nutrient surpluses from dairy farming harm the environment.
MINAS penalises farms with a levy if the farm nutrient surpluses exceed a certain threshold.
This generally led to the average hill farm having the highest product-related environmental impacts, but this system had the lowest nutrient surpluses per unit area.
Groundwater-nitrate concentrations are compared between the experimental farm 'De Marke' — which was designed to minimize nutrient surpluses — and farms being representative for the sandy region of the Netherlands.
Despite 15 years of policies and measures to decrease nutrient losses, experimental dairy farms based on careful nutrient management, like 'De Marke', realize much higher resource use efficiencies and much lower nutrient surpluses than the average commercial dairy farm.
