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Phase 2:
ACTIVITY 1: Greenhouse conditions
Our phase 1 is finished and it consisted of:
Making the logo
Making a garden which included a diversity of species
Building a greenhouse.
These activities were carried out by our students from the Open class, who performed the ones below which are needed for the second phase:
1- Making the front garden of the school planting the Mediterranian aromatic plants that were studied in the second phase. It was useful because they made a first study of these plants grew in a Mediterranean climate.
2- Installing a drip irrigation system to maximise water because it is a drop to drop system.
3- Building the school greenhouse.
The objective of the experiment: Thanks to them, students who participate in the second phase of the project could start it. It was carried by students aged 15-16 and the first task they had was planting the aromatic/ xerophytic plants (soge, lavender, rosemary and thyme) in the greenhouse to study how they react when the climate is very hot and humid, like a climate effect.
Observation: 10 weeks. Each pot was watered with 500mL twice a week (total amount of water received 400L).
Teamwork: Each group was in charge of taking care of a group of 16 plants which contained 4 plants of each type in 4 types of substratum.
20221021_093426.mp4Results: After 10 weeks of observations, 31 out of 64 studied samples have been damaged.
First conclusions:
Regarding substratum, there was a higher number of damaged plants which were grown using Baster with Vermiculite since it retains a lot of water and consequently, the substratum cannot oxygenate. The other substratum which also had several incidents was Gramox.
Regarding the type of plants, all Tymus Compacta died and all of them had to be replaced. It is the most delicate species under these conditions (heat and humidity). On the other hand, Rosmarinus is the most resistant in these conditions.
ACTIVITY 2: HYDRIC STRESS
The objective of the experiment: Xerophytic plants were subjected to hydric stress outdoors (temperature and humidity of the area.)
Observation: 16 weeks. Each week the amount to water poured is reduced.
CONTROL SAMPLE (WITHOUT TREATMENT)
DIRECT OBSERVATION OUTSIDE
Results: After 16 weeks of observation:
Regarding the type of plants, all groups share this characteristic:
The most delicate is Lavandula Dentata and the most resistant is Tymus Compacta.
Regarding the type of substratum, the results vary:
Lavandula Dentata is less deteriorated when it grows in a substratum which retains humidity such as baster (even better than with baster with vermiculite).
Rosmarinus nad Lavaudla Angustifolia have a better appearance when the substratum is Gramox.
Therefore, the type of substratum does not seem so affect Tymus Compacta because it always show a good appearance independently of the substratum used.
Finally, 100% of plants have survived well under these conditions. The best conditions for each plant is marked in the following chart with a tick.
ACTIVITY 3: Making cuttings
The objective of the experiment: Make cutting of the plants students and Open class students have worked with to grow each species in these two conditions:
1. independently in a pot
2. One cutting of two species live together in a pot.
Observation: Cuttings have been wetted with a liquid which is rooting L hormone, which can be used at home.
To prepare cuttings, students have cut the stem diagonally and almost all leaves so that stems could grow the maximum as possible.
After this, students watered them but evolution could not be recorded since all plants died.
The technique used was changed and the procedure was repeated three times to try to get results.
Results: Although the experiment was repeated three times, tracking could not be done because all plants died.
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