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| Lemming, Camilla; Oberson, Astrid; Hund, Andreas; Stoumann Jensen, Lars; Magid, Jakob. |
| Background: Phosphorus recycling from waste and localised placement of fertilisers can be means to improve sustainable P management in agriculture. However, knowledge about root and plant P uptake responses to placement of complex waste- derived fertilisers is lacking. Methods: Sewage sludge (SS) and sewage sludge ash (ASH) were tested against triple superphosphate (TSP) in a rhizobox setup where shoot and root growth of maize was followed for 30 days. The three P sources were either mixed homogenously into the soil (labelled with 33P) or localised in a patch close to the seed. Results: While localised TSP and SS both increased root length density around the fertiliser patch, it was at the expense of the remaining root system and soil P uptake for SS.... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover. |
| Ano: 2015 |
URL: http://orgprints.org/29273/7/29273.pdf |
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| Sánchez‐Esteva, Sara; Gómez‐Muñoz, Beatrice; Stoumann Jensen, Lars; Neergaard, Andreas de; Magid, Jakob. |
| Background: Penicillium bilaii may enhance P availability to plants, since it has been shown to increase plant growth and P uptake. There is currently increasing interest in using microorganisms to promote P mobilisation from organic P sources. An investigation was conducted to determine the e ects of P. bilaii on P uptake and growth of wheat in the presence and absence of sewage sludge. Two soils di ering in P contents and pH were used, as it was hypothesised that these a ect the e ciency of P mobilisation. Methods: A pot experiment, in which wheat was grown for 35 days in a moderately acidic soil of low P status and a calcareous soil of moderate P status, was conducted. A full factorial design was used with two non‐sterilised soils, three amendments... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions; Nutrient turnover. |
| Ano: 2016 |
URL: http://orgprints.org/30704/1/Sanches%20CBTA%202016.pdf |
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| Wang, Yaosheng; Stoumann Jensen, Lars; Magid, Jakob. |
| Sewage sludge (SS) can be used as an alternative fertilizer in agriculture. It is normally broad- casted and plowed into soil, but it is not clear if it has a potential as a placement fertilizer. A rhizo- box experiment was conducted to investigate the placement effect of SS and mineral nitrogen (N) fertilizer on shoot and root growth as well as nutrient uptake of spring wheat (Triticum aesti- vum L.). The treatments included localized SS, mixed SS, localized SS and ammonium, local- ized ammonium, and a control without addition of SS and ammonium to examine the effect of SS placement and, further, if ammonium co-localization would enhance the placement effect. The re- sults show that SS fertilization improved soil N and P availability, which significantly... |
| Tipo: Journal paper |
Palavras-chave: Composting and manuring; Nutrient turnover. |
| Ano: 2016 |
URL: http://orgprints.org/30701/1/Wang%20Localized%20application%20JPNSS%202016.pdf |
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| Pedersen, Anders; Stoumann Jensen, Lars; Thorup-Kristensen, Kristian. |
| The use of crops and catch crops with deep rooting can strongly improve the possibility of retaining nitrate-N that will otherwise be leached to the deeper soil layers and end up in the surrounding environment. But will it always be an advantage for the farmer to grow a catch crop? This will depend on factors such as soil mineral nitrogen level, soil water holding capacity, winter precipitation, rooting depth and N demand of the scceeding crop. These factors interact, and it can be very difficult for farmers or advisors to use this information to decide whether growing a catch crop will be beneficial. To analyse the effect of catch crops under different Danish soil and precipitation conditions, we used the soil, plant and atmosphere model Daisy. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Post harvest management and techniques; Crop combinations and interactions; Farm nutrient management; Soil quality. |
| Ano: 2005 |
URL: http://orgprints.org/7831/1/7831.pdf |
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