Drivers of Phosphorus Efficiency in Tropical and Subtropical Cropping Systems
Phosphorus (P) is an essential nutrient but is commonly limiting for food production in tropical and subtropical maize cropping. The efficiency of P fertiliser uptake is often low (5–30%) for various site-specific reasons and so identifying the drivers of P efficiency for different systems is impo...
| Autores principales: | , , , , , , , , |
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| Formato: | Conference Paper |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2019
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/106628 |
| _version_ | 1855541772743081984 |
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| author | Das, Bianca Huth, Neil I. Probert, Merv Paul, Birthe K. Kihara, Job Maguta Bolo, Peter Omondi Rodríguez, Daniel Herrero, Mario Schmidt, Susanne |
| author_browse | Bolo, Peter Omondi Das, Bianca Herrero, Mario Huth, Neil I. Kihara, Job Maguta Paul, Birthe K. Probert, Merv Rodríguez, Daniel Schmidt, Susanne |
| author_facet | Das, Bianca Huth, Neil I. Probert, Merv Paul, Birthe K. Kihara, Job Maguta Bolo, Peter Omondi Rodríguez, Daniel Herrero, Mario Schmidt, Susanne |
| author_sort | Das, Bianca |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Phosphorus (P) is an essential nutrient but is commonly limiting for food production in tropical
and subtropical maize cropping. The efficiency of P fertiliser uptake is often low (5–30%) for various
site-specific reasons and so identifying the drivers of P efficiency for different systems is important. We
conducted a sensitivity analysis on the parameters of a well-established cropping systems model
(APSIM) for a wide range of soil, crop and management factors to understand their influence on yield.
The analysis was conducted for two contrasting maize cropping systems: (a) a high-input, large-scale
commercial system in subtropical Queensland, Australia and (b) a low-input, small-holder system in
tropical, western Kenya. In Queensland, yield was most sensitive to available P and mineral N supply,
and the sensitivity of both increased with in-crop rainfall. Available P was also the most important
parameter in Western Kenya, but N supply had much weaker influence due to higher levels of organic
matter. Parameters controlling P sorption were more important than other soil parameters at both sites
irrespective of seasonal conditions. In conclusion, these results suggest that efforts to improve efficiency
of P use by plants need to account for interactions between water and N supply in environments where
these are limiting. They also highlight a potential constraint to modelling of these systems as some of
the most influential parameters are difficult to measure directly. |
| format | Conference Paper |
| id | CGSpace106628 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1066282024-01-22T09:44:16Z Drivers of Phosphorus Efficiency in Tropical and Subtropical Cropping Systems Das, Bianca Huth, Neil I. Probert, Merv Paul, Birthe K. Kihara, Job Maguta Bolo, Peter Omondi Rodríguez, Daniel Herrero, Mario Schmidt, Susanne kenya australia soil phosphorus efficiency Phosphorus (P) is an essential nutrient but is commonly limiting for food production in tropical and subtropical maize cropping. The efficiency of P fertiliser uptake is often low (5–30%) for various site-specific reasons and so identifying the drivers of P efficiency for different systems is important. We conducted a sensitivity analysis on the parameters of a well-established cropping systems model (APSIM) for a wide range of soil, crop and management factors to understand their influence on yield. The analysis was conducted for two contrasting maize cropping systems: (a) a high-input, large-scale commercial system in subtropical Queensland, Australia and (b) a low-input, small-holder system in tropical, western Kenya. In Queensland, yield was most sensitive to available P and mineral N supply, and the sensitivity of both increased with in-crop rainfall. Available P was also the most important parameter in Western Kenya, but N supply had much weaker influence due to higher levels of organic matter. Parameters controlling P sorption were more important than other soil parameters at both sites irrespective of seasonal conditions. In conclusion, these results suggest that efforts to improve efficiency of P use by plants need to account for interactions between water and N supply in environments where these are limiting. They also highlight a potential constraint to modelling of these systems as some of the most influential parameters are difficult to measure directly. 2019-12-30 2020-01-20T15:33:08Z 2020-01-20T15:33:08Z Conference Paper https://hdl.handle.net/10568/106628 en Open Access MDPI Das, Bianca; Huth, Neil; Probert, Merv; Paul, Birthe; Kihara, Job; Bolo, Peter; Rodriguez, Daniel; Herrero,Mario & Schmidt, Susanne. (2019). Drivers of Phosphorus Efficiency in Tropical and Subtropical Cropping Systems. Presented at the third International Tropical Agriculture conference (TROPAG 2019), Brisbane, Australia, 11-13 November 2019. 36,13. |
| spellingShingle | kenya australia soil phosphorus efficiency Das, Bianca Huth, Neil I. Probert, Merv Paul, Birthe K. Kihara, Job Maguta Bolo, Peter Omondi Rodríguez, Daniel Herrero, Mario Schmidt, Susanne Drivers of Phosphorus Efficiency in Tropical and Subtropical Cropping Systems |
| title | Drivers of Phosphorus Efficiency in Tropical and Subtropical Cropping Systems |
| title_full | Drivers of Phosphorus Efficiency in Tropical and Subtropical Cropping Systems |
| title_fullStr | Drivers of Phosphorus Efficiency in Tropical and Subtropical Cropping Systems |
| title_full_unstemmed | Drivers of Phosphorus Efficiency in Tropical and Subtropical Cropping Systems |
| title_short | Drivers of Phosphorus Efficiency in Tropical and Subtropical Cropping Systems |
| title_sort | drivers of phosphorus efficiency in tropical and subtropical cropping systems |
| topic | kenya australia soil phosphorus efficiency |
| url | https://hdl.handle.net/10568/106628 |
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