Using the 15N natural abundance for a quantitative approach to N recovery from organic fertilizers
ABSTRACT The influence of organic inputs, such as manure and compost, on the 15N values of growing plants suggests it may be possible to use of 15N natural abundance (NA) as a nitrogen (N) tracer. This study aimed to verify the feasibility of using the TM15N values to estimate compost-N recovery by...
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Sociedade Brasileira de Ciência do Solo
2025-07-01
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| Series: | Revista Brasileira de Ciência do Solo |
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| author | Caio Teves Inácio Segundo Urquiaga Phillip Michael Chalk |
| author_facet | Caio Teves Inácio Segundo Urquiaga Phillip Michael Chalk |
| author_sort | Caio Teves Inácio |
| collection | DOAJ |
| description | ABSTRACT The influence of organic inputs, such as manure and compost, on the 15N values of growing plants suggests it may be possible to use of 15N natural abundance (NA) as a nitrogen (N) tracer. This study aimed to verify the feasibility of using the TM15N values to estimate compost-N recovery by plants. A field experiment was carried out by growing head lettuce, carrots and broccoli in sequence under increasing levels of compost (randomized complete blocks, six doses, four replicates). The compost was produced on-farm using horse bedding manure and vegetable waste. We found a positive and significant correlation between vegetables yield × TM15N-plant as well as between N-harvested × TM15N-plant, alongside the response to the increasing levels of compost. Positive and significant (α = 0.05) correlations were found for carrots (R = 0.91 and 0.95) meanwhile, no significant correlations were found for broccoli (R = 0.60 and 0.66). Lettuce did not respond to compost levels. We applied an equation to estimate compost-N recovery by carrots based on the variation pattern that was found in TM15N-plant. A positive and significant correlation between TM15N-plant and plant yield (or N harvested) is the first condition to obtain valid estimates. The estimated compost-N recovery for carrots was from 4.7 to 9.1 %, respectively, at 0.5 and 2.0 kg m-2 of compost (dry basis). Sources of uncertainty are also discussed, and include intra-plant 15N fractionation, which might require further studies of sampling strategies. This study shows the theoretical and experimental basis of using compost (dry basis). Sources of uncertainty are also discussed, and include intra-plantN to estimate organic fertilizer-N recovery by crops. |
| format | Article |
| id | doaj-art-72cec6c859ce44e3b444b1bfc69815be |
| institution | Kabale University |
| issn | 1806-9657 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Sociedade Brasileira de Ciência do Solo |
| record_format | Article |
| series | Revista Brasileira de Ciência do Solo |
| spelling | doaj-art-72cec6c859ce44e3b444b1bfc69815be2025-08-20T03:33:11ZengSociedade Brasileira de Ciência do SoloRevista Brasileira de Ciência do Solo1806-96572025-07-014910.36783/18069657rbcs20240182Using the 15N natural abundance for a quantitative approach to N recovery from organic fertilizersCaio Teves Ináciohttps://orcid.org/0000-0002-5376-0420Segundo Urquiagahttps://orcid.org/0000-0002-3601-1233Phillip Michael Chalkhttps://orcid.org/0000-0003-4419-433XABSTRACT The influence of organic inputs, such as manure and compost, on the 15N values of growing plants suggests it may be possible to use of 15N natural abundance (NA) as a nitrogen (N) tracer. This study aimed to verify the feasibility of using the TM15N values to estimate compost-N recovery by plants. A field experiment was carried out by growing head lettuce, carrots and broccoli in sequence under increasing levels of compost (randomized complete blocks, six doses, four replicates). The compost was produced on-farm using horse bedding manure and vegetable waste. We found a positive and significant correlation between vegetables yield × TM15N-plant as well as between N-harvested × TM15N-plant, alongside the response to the increasing levels of compost. Positive and significant (α = 0.05) correlations were found for carrots (R = 0.91 and 0.95) meanwhile, no significant correlations were found for broccoli (R = 0.60 and 0.66). Lettuce did not respond to compost levels. We applied an equation to estimate compost-N recovery by carrots based on the variation pattern that was found in TM15N-plant. A positive and significant correlation between TM15N-plant and plant yield (or N harvested) is the first condition to obtain valid estimates. The estimated compost-N recovery for carrots was from 4.7 to 9.1 %, respectively, at 0.5 and 2.0 kg m-2 of compost (dry basis). Sources of uncertainty are also discussed, and include intra-plant 15N fractionation, which might require further studies of sampling strategies. This study shows the theoretical and experimental basis of using compost (dry basis). Sources of uncertainty are also discussed, and include intra-plantN to estimate organic fertilizer-N recovery by crops.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832025000100906&lng=en&tlng=ennutrient managementcompostanimal manurevegetablesplant nutrition |
| spellingShingle | Caio Teves Inácio Segundo Urquiaga Phillip Michael Chalk Using the 15N natural abundance for a quantitative approach to N recovery from organic fertilizers Revista Brasileira de Ciência do Solo nutrient management compost animal manure vegetables plant nutrition |
| title | Using the 15N natural abundance for a quantitative approach to N recovery from organic fertilizers |
| title_full | Using the 15N natural abundance for a quantitative approach to N recovery from organic fertilizers |
| title_fullStr | Using the 15N natural abundance for a quantitative approach to N recovery from organic fertilizers |
| title_full_unstemmed | Using the 15N natural abundance for a quantitative approach to N recovery from organic fertilizers |
| title_short | Using the 15N natural abundance for a quantitative approach to N recovery from organic fertilizers |
| title_sort | using the 15n natural abundance for a quantitative approach to n recovery from organic fertilizers |
| topic | nutrient management compost animal manure vegetables plant nutrition |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832025000100906&lng=en&tlng=en |
| work_keys_str_mv | AT caiotevesinacio usingthe15nnaturalabundanceforaquantitativeapproachtonrecoveryfromorganicfertilizers AT segundourquiaga usingthe15nnaturalabundanceforaquantitativeapproachtonrecoveryfromorganicfertilizers AT phillipmichaelchalk usingthe15nnaturalabundanceforaquantitativeapproachtonrecoveryfromorganicfertilizers |