| Autor: |
Maltase Mutanda, Vincent Chaplot, Hussein Shimelis, Kwame W. Shamuyarira, Sandiswa Figlan |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Food and Energy Security, Vol 13, Iss 1, Pp n/a-n/a (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2048-3694 |
| DOI: |
10.1002/fes3.522 |
| Popis: |
Abstract Field assessments of crop water use efficiency (WUE) are resource‐consuming since they require simultaneous assessment of the total amount of water assimilated by crops for biomass and/or grain production. Alternative methods exist, such as estimating the carbon isotopic ratio (13C/12C) of the crop's leaf, aboveground biomass, or grain samples. There is limited information on the determinants of the accuracy of carbon isotopes in estimating water use efficiency between crop types and environments. Therefore, this study aimed to evaluate the extent to which the estimation of the 13C/12C ratio in crop parts constitutes an accurate proxy of WUE, globally. Data on observed WUE (WUEobs) were collated involving 518 experiments conducted worldwide on major cereals and legumes and compared with WUE estimates (WUEest) from carbon isotopes. The mean WUEobs among all experiments was 3.4 g L−1 and the mean absolute error (MAE) was 0.5 g L−1 or 14.7% of WUEobs, corresponding to accurate predictions at p |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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