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| Content Provider | Directory of Open Access Journals (DOAJ) |
|---|---|
| Author | Larissa Kamp Jens Hartung Benjamin Mast Simone Graeff-Hönninger |
| Abstract | The tuberous root crop, yacon, is native to the Andean region and contains high amounts of fructooligosaccharides (FOS) with up to 70% of dry matter. Due to FOS, consumption of tubers may have health-promoting effects. However, regarding the overall cultivation system, no recommendations exist for farmers on nitrogen fertilization and nitrogen (N) uptake of yacon. Therefore, three different N fertilization levels (0, 40, and 80 kg N $ha^{−1}$) and two genotypes (brown-shelled (BG) and red-shelled (RG)) were examined in a two-year field experiment regarding their tuber yield, sugar composition, and nitrogen uptake. Tuber yields increased with increasing fertilization level and were highest for B80 and R80 (50 and 67 t FM $ha^{−1}$), while significant differences between the genotypes existed. Sugar and the amount of FOS slightly decreased with increasing N fertilization level, and ranged between 36% and 73% and 30% and 58% of dry matter, respectively. An overall decreasing amount of FOS led to a slight increase in the amount of FOS with a higher degree of polymerization. Regarding the N-use efficiency of tubers and the total plant, an N fertilization level of 40 kg N $ha^{−1}$ seems to favor tuber yield. |
| e-ISSN | 20734395 |
| DOI | 10.3390/agronomy9030151 |
| Journal | Agronomy |
| Issue Number | 3 |
| Volume Number | 9 |
| Language | English |
| Publisher | MDPI AG |
| Publisher Date | 2019-01-01 |
| Publisher Place | Switzerland |
| Access Restriction | Open |
| Subject Keyword | Agriculture Fructooligosaccharide Yacon Nitrogen Content |
| Content Type | Text |
| Resource Type | Article |
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