Nitrogen and Phosphorus Changes in Soil and Soil Water after Cultivation
Untilled dairy pasture has the potential to release more phosphorus to the environment than a regularly ploughed pasture. In this paper we report the initial results of a study comparing the effects of cultivation, phosphorus (P) fertiliser (10, 35, and 100 kg P/ha), and two types of vegetation (rye...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Applied and Environmental Soil Science |
| Online Access: | http://dx.doi.org/10.1155/2012/157068 |
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| author | Mark Watkins Hayley Castlehouse Murray Hannah David M. Nash |
| author_facet | Mark Watkins Hayley Castlehouse Murray Hannah David M. Nash |
| author_sort | Mark Watkins |
| collection | DOAJ |
| description | Untilled dairy pasture has the potential to release more phosphorus to the environment than a regularly ploughed pasture. In this paper we report the initial results of a study comparing the effects of cultivation, phosphorus (P) fertiliser (10, 35, and 100 kg P/ha), and two types of vegetation (ryegrass (Lolium perenne) or ryegrass mixed with clover (Trifolium repens)) in a randomised complete block design. Phosphorus was measured in soil samples taken from depths of 0–20 mm and 0–100 mm. Waters extracted from the 0–20 mm samples were also analysed. In all cases, the P concentrations (Olsen P, Colwell P, Total P, CaCl2 extractable P, Dissolved Reactive P, and Total Dissolved P) in the top 20 mm declined with ploughing. Dissolved Reactive P measured in the soil water was 70% less overall in the ploughed plots compared with the unploughed plots, and by 35 weeks after P treatments the decrease in Dissolved Reactive P was 66%. The effects of the fertiliser and pasture treatments were inconclusive. The data suggest that ploughing can lower the risk of P exports from intensive dairy farms in the trial area. |
| format | Article |
| id | doaj-art-990bba6fded64ee3b5b99731110cccb9 |
| institution | Kabale University |
| issn | 1687-7667 1687-7675 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
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| series | Applied and Environmental Soil Science |
| spelling | doaj-art-990bba6fded64ee3b5b99731110cccb92025-02-03T01:11:49ZengWileyApplied and Environmental Soil Science1687-76671687-76752012-01-01201210.1155/2012/157068157068Nitrogen and Phosphorus Changes in Soil and Soil Water after CultivationMark Watkins0Hayley Castlehouse1Murray Hannah2David M. Nash3Future Farming Systems Research Division, Department of Primary Industries, 1301 Hazeldean Road Ellinbank, VIC 3821, AustraliaFuture Farming Systems Research Division, Department of Primary Industries, 1301 Hazeldean Road Ellinbank, VIC 3821, AustraliaFuture Farming Systems Research Division, Department of Primary Industries, 1301 Hazeldean Road Ellinbank, VIC 3821, AustraliaFuture Farming Systems Research Division, Department of Primary Industries, 1301 Hazeldean Road Ellinbank, VIC 3821, AustraliaUntilled dairy pasture has the potential to release more phosphorus to the environment than a regularly ploughed pasture. In this paper we report the initial results of a study comparing the effects of cultivation, phosphorus (P) fertiliser (10, 35, and 100 kg P/ha), and two types of vegetation (ryegrass (Lolium perenne) or ryegrass mixed with clover (Trifolium repens)) in a randomised complete block design. Phosphorus was measured in soil samples taken from depths of 0–20 mm and 0–100 mm. Waters extracted from the 0–20 mm samples were also analysed. In all cases, the P concentrations (Olsen P, Colwell P, Total P, CaCl2 extractable P, Dissolved Reactive P, and Total Dissolved P) in the top 20 mm declined with ploughing. Dissolved Reactive P measured in the soil water was 70% less overall in the ploughed plots compared with the unploughed plots, and by 35 weeks after P treatments the decrease in Dissolved Reactive P was 66%. The effects of the fertiliser and pasture treatments were inconclusive. The data suggest that ploughing can lower the risk of P exports from intensive dairy farms in the trial area.http://dx.doi.org/10.1155/2012/157068 |
| spellingShingle | Mark Watkins Hayley Castlehouse Murray Hannah David M. Nash Nitrogen and Phosphorus Changes in Soil and Soil Water after Cultivation Applied and Environmental Soil Science |
| title | Nitrogen and Phosphorus Changes in Soil and Soil Water after Cultivation |
| title_full | Nitrogen and Phosphorus Changes in Soil and Soil Water after Cultivation |
| title_fullStr | Nitrogen and Phosphorus Changes in Soil and Soil Water after Cultivation |
| title_full_unstemmed | Nitrogen and Phosphorus Changes in Soil and Soil Water after Cultivation |
| title_short | Nitrogen and Phosphorus Changes in Soil and Soil Water after Cultivation |
| title_sort | nitrogen and phosphorus changes in soil and soil water after cultivation |
| url | http://dx.doi.org/10.1155/2012/157068 |
| work_keys_str_mv | AT markwatkins nitrogenandphosphoruschangesinsoilandsoilwateraftercultivation AT hayleycastlehouse nitrogenandphosphoruschangesinsoilandsoilwateraftercultivation AT murrayhannah nitrogenandphosphoruschangesinsoilandsoilwateraftercultivation AT davidmnash nitrogenandphosphoruschangesinsoilandsoilwateraftercultivation |