Publication Date
1993
Description
There are close links between the carbon (C), nitrogen (N), phosphorus {P) and sulphur (S) cycles. This is especially evident in legume-based pasture in which ahe application of P and S fertilisers are required to achieve saaisfactory levels of N2 fixation and pasture production The dynamics of the nutrient cycles are controlled largely by the rates of pasture production and consumption, and by the rate of decomposition of organic matter. The CENTURY soil organic matter model integrates climate, soil and management driving variables to predict C, N, P and S dynamics. Simulated effecls of P and S fertiliser on nutrient cycling and soil organic matter (SOM) are compared with field results for a grazed, irrigated pasture in Canterbury, New Zealand. The model correctly predicted an accumulation of C, N, P and S in SOM and an increase in inorganic P in response to fertiliser, but failed to predict an increase in SOM in the control treatment.
Citation
Metherell, A K.; Cole, C V.; and Parton, W J., "Dynamics and Interactions of Carbon, Nitrogen, Phosphorus and Sulphur Cycling in Grazed Pasture" (2024). IGC Proceedings (1993-2023). 4.
https://uknowledge.uky.edu/igc/1993/session40/4
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Dynamics and Interactions of Carbon, Nitrogen, Phosphorus and Sulphur Cycling in Grazed Pasture
There are close links between the carbon (C), nitrogen (N), phosphorus {P) and sulphur (S) cycles. This is especially evident in legume-based pasture in which ahe application of P and S fertilisers are required to achieve saaisfactory levels of N2 fixation and pasture production The dynamics of the nutrient cycles are controlled largely by the rates of pasture production and consumption, and by the rate of decomposition of organic matter. The CENTURY soil organic matter model integrates climate, soil and management driving variables to predict C, N, P and S dynamics. Simulated effecls of P and S fertiliser on nutrient cycling and soil organic matter (SOM) are compared with field results for a grazed, irrigated pasture in Canterbury, New Zealand. The model correctly predicted an accumulation of C, N, P and S in SOM and an increase in inorganic P in response to fertiliser, but failed to predict an increase in SOM in the control treatment.
