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![Page 1: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/1.jpg)
OPPORTUNITY TO INCREASE PHOSPHORUS EFFICIENCY THROUGH CO-APPLICATION OF
ORGANIC AMENDMENTS WITH MONO-AMMONIUM PHOSPHATE (MAP)
David GaleNSW Department of Primary Industries
andCharles Sturt University, Wagga Wagga
Project collaborators: Dr Jason Condon, Dr Mark Conyers and Dr Alison Southwell
Project funding from: GRDC, EH Graham Centre and Charles Sturt University
![Page 2: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/2.jpg)
Topics covered in today’s presentation:
Why do we want to increase phosphorus efficiency? Why are we interested in organic soil amendments?
Glasshouse trial results
Conclusions and Future research
Audience questions
![Page 3: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/3.jpg)
Why are we interested in organic soil amendments?
![Page 4: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/4.jpg)
Why are we interested in organic soil amendments?
![Page 5: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/5.jpg)
Why are we interested in organic soil amendments?
![Page 6: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/6.jpg)
Why are we interested in organic soil amendments?
![Page 7: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/7.jpg)
Why are we interested in organic soil amendments?
![Page 8: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/8.jpg)
Why are we interested in organic soil amendments?
![Page 9: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/9.jpg)
Why are we interested in organic soil amendments?
![Page 10: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/10.jpg)
Why are we interested in organic soil amendments?
![Page 11: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/11.jpg)
Why are we interested in organic soil amendments?
![Page 12: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/12.jpg)
Glasshouse trial
Design– Barley (Hordeum vulgare cv. Hindmarsh)– Plastic pots (12.7 x 12.7cm, 14.5cm)– Randomised block design– 11 treatments– 4 replicates
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Glasshouse trial
Sampling and analysis– Sampling pre-planting and after 8 weeks of
growth (harvest)– Above ground dry matter– Below ground dry matter– Soil phosphorus (P) Colwell P
Nitric acid digest
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![Page 18: Opportunity to increase phosphorus efficiency through co-application of organic amendments with mono-ammonium phosphate (MAP) David Gale](https://reader035.fdocuments.us/reader035/viewer/2022081520/58f257e11a28abcd5c8b45a9/html5/thumbnails/18.jpg)
Conclusions In principle co-application of compost and
synthetic fertiliser leads to an increase in uptake efficiency
Utilisation efficiency does not appear to be benifited by coapplication, however, this is thought to be due to the interactions of other nutrients.
Current rates of compost are quite large
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Future research
Reduce volumes Assess social implications
Continue investigation of the benefits of coapplication of compost and synthetic fertiliser for applications such as disease suppression.
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With thanks to
Funding bodies– EHGC– GRDC– CSU
Project collaborators
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Audience questions
Are there any questions?
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