Publication Date
1997
Description
The objective of this approach was to check the possibility to modify a dynamic model for simultaneous simulation of the above-ground dry matter growth (DM) and concentrations of crude protein CP) and metabolizable energy (ME) in stands of timothy (Phleum pratense L.) to a model for mixed leys with timothy and red clover (Trifolium pratense L.). DM growth is estimated in relation to intercepted radiation, air temperature, soil-water status and tissue-N concentration. CP is estimated in relation to plant uptake of N from soil mineralization, nitrogen fixation and applied fertilizer, and dilution of N during plant growth. ME is estimated in relation to plant development as influenced by genotype, temperature and day length.
Citation
Gustavsson, A.-M, "A Dynamic Model for Changes in Nutritional Value in Grass. An Approach to Modify the Model to a Mixed Ley with Grass and Red Clover" (2024). IGC Proceedings (1997-2023). 31.
https://uknowledge.uky.edu/igc/1997/session17/31
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
A Dynamic Model for Changes in Nutritional Value in Grass. An Approach to Modify the Model to a Mixed Ley with Grass and Red Clover
The objective of this approach was to check the possibility to modify a dynamic model for simultaneous simulation of the above-ground dry matter growth (DM) and concentrations of crude protein CP) and metabolizable energy (ME) in stands of timothy (Phleum pratense L.) to a model for mixed leys with timothy and red clover (Trifolium pratense L.). DM growth is estimated in relation to intercepted radiation, air temperature, soil-water status and tissue-N concentration. CP is estimated in relation to plant uptake of N from soil mineralization, nitrogen fixation and applied fertilizer, and dilution of N during plant growth. ME is estimated in relation to plant development as influenced by genotype, temperature and day length.
