Publication Date
1997
Description
Russell lupin (Lupinus polyphyllus) was established by oversowing into low fertility, depleted tussock rangeland in 1990. The soil was low in phosphorus (P) and sulphur (S). P, (O, 12.5, 25 or 50 kg P /ha) and S (0 or 60 kg S/ha) were applied at sowing. In May 1994, a further 0 or 60 kg S /ha was applied as a sub-plot treatment. Lupin and grass dry matter (DM) was assessed in December 1995. Lupin did not grow in the absence of S. Lupin and grass responded to the additional S giving a maximum of 4.2 and 4.9 t DM/ha respectively compared with a maximum of 1.0 and 2.9 t DM/ha in the absence of the additional S. In the absence of fertiliser P, addition of S increased lupin DM confirming that lupin was able to extract P from soils with low natural P content.
Citation
Jarvis, P; Lucas, R J.; and White, J.G. H., "Sulphur and Phosphorus Responses of Russell Lupin in Rangeland" (2024). IGC Proceedings (1993-2023). 11.
https://uknowledge.uky.edu/igc/1997/session10/11
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Sulphur and Phosphorus Responses of Russell Lupin in Rangeland
Russell lupin (Lupinus polyphyllus) was established by oversowing into low fertility, depleted tussock rangeland in 1990. The soil was low in phosphorus (P) and sulphur (S). P, (O, 12.5, 25 or 50 kg P /ha) and S (0 or 60 kg S/ha) were applied at sowing. In May 1994, a further 0 or 60 kg S /ha was applied as a sub-plot treatment. Lupin and grass dry matter (DM) was assessed in December 1995. Lupin did not grow in the absence of S. Lupin and grass responded to the additional S giving a maximum of 4.2 and 4.9 t DM/ha respectively compared with a maximum of 1.0 and 2.9 t DM/ha in the absence of the additional S. In the absence of fertiliser P, addition of S increased lupin DM confirming that lupin was able to extract P from soils with low natural P content.
