More Food for Mars and Moon
21.08.2023 - 11:55
/ theunconventionalgardener.com
/ Emma Doughty
A little while ago, I told you about a preliminary experiment that Dr Wieger Wamelink and his team at the University of Wageningen conducted. It demonstrated that it is possible to grow plants in simulated Mars and Moon soils.
The next step in their research was an experiment focusing on ten crop species. Their goal was to produce edible crops and some viable seeds. A major difference to the first experiment was that they added some organic matter to the simulated soils as if they had ‘ploughed in’ the crop residues from the first experiment. They used freshly mown grass as the organic matter; Lolium perenne (perennial ryegrass) is a common meadow grass species in the Netherlands.
The ten crop species chosen were:
“Species were selected to provide a representative selection of crops with different edible parts, except for below ground parts (roots, tuber etc.). Leek, radish, rocket and chives were also selected because of their spicy taste. Astronauts on the ISS often complain about the taste of their food and spicy crops may therefore be a welcome addition to their diet.”
The team sowed their seeds on 9 April 2015, in a greenhouse in the Netherlands, in Mars simulant JSC Mars-1A and Moon simulant JSC-1A. (Organic potting soil was used as the Earth ‘control’ soil.) They fed each tray of plants once a month with a balanced liquid fertiliser. This was to mimic inputs that could be made from astronauts urine and faeces! They watered each tray daily.
The researchers cared for their plants this way for 159 days until the experiment ended on 5 September 2015. They then harvested, dried and weighed all of the top growth of the plants.
The only crop that didn’t grow well on any of the soils was spinach, which promptly bolted (formed
The website greengrove.cc is an aggregator of news from open sources. The source is indicated at the beginning and at the end of the announcement. You can
send a complaint on the news if you find it unreliable.