Aloe vera is a plant with medicinal and nutritional uses that grows in warm regions and contains
nutrients and biological stimuli. The objective of this study was to evaluate the effect of reducing the
intensity of sunlight with canopies hemp and application of salicylic acid on morphological
characteristics, gel and aloin in aloe vera at the Bushehr province. In this experiment, the interaction of
different levels of shading 30, 70 and 100 % of sunlight with salicylic acid levels 0, 10-8, 10-6, 10-4 and
10-2 mM were examined. The results showed that maximum plant weight, width and length of the leaf
and gel production were in 70% light treatment, but the highest amount of Aloin was obtained under
full light condition. Salicylic acid had a significant effect on leaf width and plant weight and Aloin.
The result of the interaction between shading levels and salicylic acid were found in 70% complete
light intensity with salicylic acid at concentration of 10-6 mM for the greatest influence on many
measured characteristics. According to the results, canopy can be used for perennial plants such as the
Aloe vera to increase crop production in warm seasons. But, application of salicylic acid needs to more
study.