TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Petersen, Finn
A1  - Demann, Johannes
A1  - Restemeyer, Dina
A1  - Ulbrich, Andreas
A1  - Olfs, Hans-Werner
A1  - Westendarp, Heiner
A1  - Appenroth, Klaus-Jürgen
T1  - Influence of the Nitrate-N to Ammonium-N Ratio on Relative Growth Rate and Crude Protein Content in the Duckweeds Lemna minor and Wolffiella hyalina
JF  - Plants
N2  - In order to produce protein-rich duckweed for human and animal consumption, a stable cultivation process, including an optimal nutrient supply for each species, must be implemented. Modified nutrient media, based on the N-medium for duckweed cultivation, were tested on the relative growth rate (RGR) and crude protein content (CPC) of Lemna minor and Wolffiella hyalina, as well as the decrease of nitrate-N and ammonium-N in the media. Five different nitrate-N to ammonium-N molar ratios were diluted to 10% and 50% of the original N-medium concentration. The media mainly consisted of agricultural fertilizers. A ratio of 75% nitrate-N and 25% ammonium-N, with a dilution of 50%, yielded the best results for both species. Based on the dry weight (DW), L. minor achieved a RGR of 0.23 ± 0.009 d−1 and a CPC of 37.8 ± 0.42%, while W. hyalina’s maximum RGR was 0.22 ± 0.017 d−1, with a CPC of 43.9 ± 0.34%. The relative protein yield per week and m2 was highest at this ratio and dilution, as well as the ammonium-N decrease in the corresponding medium. These results could be implemented in duckweed research and applications if a high protein content or protein yield is the aim.
KW  - Amino acids
KW  - Biomass production
KW  - Cultivation
KW  - Lemnaceae
KW  - Nutrient medium
KW  - Uptake
KW  - Water lentils
KW  - Yield
Y1  - 2021
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:959-opus-55487
SN  - 2223-7747
SS  - 2223-7747
U6  - https://doi.org/10.3390/plants10081741
DO  - https://doi.org/10.3390/plants10081741
VL  - 10
IS  - 8
ER  -