Development of the microgravity plant growth pocket
2003
Lefsrud, M.G. | Giacomelli, G.A. | Janes, H.W. | Kliss, M.H.
The Microgravity Pocket (MGP) was designed for continuous production of root crops in microgravity within a controlled environment. The MGP is intended to provide NASA with a "Salad Machine" to grow carrot and radish for consumption by astronauts. Attributes of the pocket system, include light weight; ease of planting, monitoring, and harvesting; no free water; and low energy requirements. The MGP system uses porous sheets of plastic to wick water to the plant roots, which are enclosed within a watertight pouch. An experiment was conducted growing carrot and radish root crops in a horizontal orientation adjacent to a water-cooled high-pressure sodium lamp. The hydrophilic property of the porous sheet provided nutrient solution to the root zone of the plants, but the small size of the pores prevented root growth into the sheet. The MGP was successful in growing both carrot and radish to harvestable size.
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