Details
| Original language | English |
|---|---|
| Pages (from-to) | 59-71 |
| Number of pages | 13 |
| Journal | Plant and soil |
| Volume | 357 |
| Issue number | 1 |
| Publication status | Published - 23 Feb 2012 |
Abstract
Background and aims: Nitrogen mineralization of lupine seeds and seedlings to be used as flexible leguminous N source in organic vegetable production was investigated. It was hypothesized that changes in seed chemical composition during germination are associated with increased fertilizer efficiency of seed N. Methods: Net N mineralization of seed meal and seedlings varying in age was determined in pot and field experiments. The temporal mineralization pattern was quantified by fitting first-order kinetics. Results: In the pot experiment, seedling C:N ratio declined within 2 weeks from initially 8. 8 to a minimum of 6. 2 prior to a re-increase. Maximum net N mineralization increased strongly with decreasing C:N ratio being up to 44% higher for seedlings compared to seed meal. Time course of net N mineralization in the field showed initial peaks partly exceeding the amount of applied lupine seed N. Ignoring mineralization peaks, the relationship between maximum net N mineralization and C:N ratio was in close agreement with pot experimental data. The critical C:N ratio of the pooled data was 13. Conclusions: Nitrogen mineralization of field-sown lupine seeds can be manipulated by varying seedling growing time until incorporation. High fertilizer efficiency provided by high net N mineralization is associated with early seedling incorporation and high germination rates.
Keywords
- C:N ratio, Lupinus angustifolius, Net N mineralization, Organic fertilizer, Priming effect, Seed germination
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
- Agricultural and Biological Sciences(all)
- Plant Science
Sustainable Development Goals
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In: Plant and soil, Vol. 357, No. 1, 23.02.2012, p. 59-71.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Decomposition of lupine seeds and seedlings as N fertilizer in organic vegetable production
AU - Katroschan, Kai Uwe
AU - Teixeira, Gonçalo
AU - Kahlen, Katrin
AU - Stützel, Hartmut
PY - 2012/2/23
Y1 - 2012/2/23
N2 - Background and aims: Nitrogen mineralization of lupine seeds and seedlings to be used as flexible leguminous N source in organic vegetable production was investigated. It was hypothesized that changes in seed chemical composition during germination are associated with increased fertilizer efficiency of seed N. Methods: Net N mineralization of seed meal and seedlings varying in age was determined in pot and field experiments. The temporal mineralization pattern was quantified by fitting first-order kinetics. Results: In the pot experiment, seedling C:N ratio declined within 2 weeks from initially 8. 8 to a minimum of 6. 2 prior to a re-increase. Maximum net N mineralization increased strongly with decreasing C:N ratio being up to 44% higher for seedlings compared to seed meal. Time course of net N mineralization in the field showed initial peaks partly exceeding the amount of applied lupine seed N. Ignoring mineralization peaks, the relationship between maximum net N mineralization and C:N ratio was in close agreement with pot experimental data. The critical C:N ratio of the pooled data was 13. Conclusions: Nitrogen mineralization of field-sown lupine seeds can be manipulated by varying seedling growing time until incorporation. High fertilizer efficiency provided by high net N mineralization is associated with early seedling incorporation and high germination rates.
AB - Background and aims: Nitrogen mineralization of lupine seeds and seedlings to be used as flexible leguminous N source in organic vegetable production was investigated. It was hypothesized that changes in seed chemical composition during germination are associated with increased fertilizer efficiency of seed N. Methods: Net N mineralization of seed meal and seedlings varying in age was determined in pot and field experiments. The temporal mineralization pattern was quantified by fitting first-order kinetics. Results: In the pot experiment, seedling C:N ratio declined within 2 weeks from initially 8. 8 to a minimum of 6. 2 prior to a re-increase. Maximum net N mineralization increased strongly with decreasing C:N ratio being up to 44% higher for seedlings compared to seed meal. Time course of net N mineralization in the field showed initial peaks partly exceeding the amount of applied lupine seed N. Ignoring mineralization peaks, the relationship between maximum net N mineralization and C:N ratio was in close agreement with pot experimental data. The critical C:N ratio of the pooled data was 13. Conclusions: Nitrogen mineralization of field-sown lupine seeds can be manipulated by varying seedling growing time until incorporation. High fertilizer efficiency provided by high net N mineralization is associated with early seedling incorporation and high germination rates.
KW - C:N ratio
KW - Lupinus angustifolius
KW - Net N mineralization
KW - Organic fertilizer
KW - Priming effect
KW - Seed germination
UR - http://www.scopus.com/inward/record.url?scp=84864135939&partnerID=8YFLogxK
U2 - 10.1007/s11104-012-1144-4
DO - 10.1007/s11104-012-1144-4
M3 - Article
AN - SCOPUS:84864135939
VL - 357
SP - 59
EP - 71
JO - Plant and soil
JF - Plant and soil
SN - 0032-079X
IS - 1
ER -