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hello thank you for checking out my

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lightning talk

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i'm rachel tucker an undergraduate

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student at the university of florida

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and i've been studying martian regolith

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as a substrate for foreign planetary

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horticulture

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why do regular studies matter human

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space exploration is increasing in

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duration and distance

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which poses a greater need for in-situ

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resource utilization in order to

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maximize available resources

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a regolith simulant offers a comparable

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substrate in order to study the

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potential of martian regolith as a local

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resource for crop production on mars

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why do we want to look at mars global

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simulant 1.

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other martian simulants are available

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such as jsc mars 1

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and mojave mars simulink both are

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sourced from natural environments and

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have been widely studied in literature

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mars global simulant 1 is a recipe

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created by excellence labs

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to mimic the mineral chemical volatile

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and spectral properties of the rockness

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regolith at gale crater which is the

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best characterized regolith to date

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in our experiment we wanted to determine

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what

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low concentrations of the mars global

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stimulant

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how that could affect crops and so we

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tested

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three different concentrations of

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regolith relative

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to an inert arcellite substrate base

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we tested 10 25 and and 50 percent

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mars global stimulant one relative to

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the arcellite

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during growth we we collected daily

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collected data daily for

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radical emergence cotyledon emergence

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first true leaves budding

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and at 10 days after planting we

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harvested and collected fresh weight

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dry weight height and widest diameter

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we planted 25 seeds for each of the

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following cultivars

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daikon radish amara mustard extra dwarf

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bok choy

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buckwheat red russian kale and

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outrageous red romaine

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pictured here is a top view of 3

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5 7 and 10 days after planting of the

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control group in the top row

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10 25 and the 50 concentration of mars

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global stimulant

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as you can see as the concentration of

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mars global stimulant increases the

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picture here is a graph for each of the

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cultivars and the x-axis is the number

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of days after planting

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and in the y-axis is the percent of

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seeds planted

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as you can see here for radical

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emergence there was a large difference

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in each of the six cultivars between the

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tony 25

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concentration of regolith and the 50

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for cotyledon emergence in five of the

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six

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cultivars with an exception of

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outrageous red romaine there was a large

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difference between the

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10 and the 25 percent concentration of

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regolith

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and again for the first true leaves

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budding for five of the six cultivars

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the exception of the outrageous red

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romaine there's a large difference

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between

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the 25 and the 10 concentrations of the

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at harvest there was not enough

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vegetative tissue in order to collect

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data for

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the 50 concentration of regolith however

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for the 20 fresh weight for the 25

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concentration of regolith relative

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to the control group each of the six

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cultivars

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was statistically significant in

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for dry weight five of the six cultivars

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were statistically significant between

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the twenty-five percent concentration of

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burglars and the test

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for the height for the harvest data it

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was very statistically significant in

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terms of the 25 percent

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concentration of regolith in which all

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six cultivars were statistically

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significant

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and in 10 concentration of regolith five

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of the six cultivars were statistically

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significant

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and as you can see pictured here the

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extra prok choi at zero percent

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um or the control group and the 10

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diameter was also greatly affected in

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for

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all six cultivars the 25 percent

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concentration of regolith was

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statistically significant from the

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control group

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what does this mean unamended mars

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global stimulant 1

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severely inhibits vegetative crop growth

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in multiple cultivars

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and not just at 100 concentration this

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occurs at low concentrations as well

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and what this means is that this this

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regolith will need to be altered in some

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way in order to become a viable

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resource for crop growth on mars

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of course this was not done as one

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person

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science takes a lot of people and a lot

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of wonderful people contributed to this

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product