Effects of salinity stress on growth and yield ofAloe vera L.

摘要

Salt stress is a limiting factor of plant growth and yield, and becoming a serious problem in the world. In this research the effect of salinity stress on Aloe plant was studied. Aloe plants were irrigated with nutrient solutions containing different levels of NaCl (0, 2, 4, 6 and 8 ds/m) in December and harvesting took place three times with one month interval in January, February and March. Results revealed that the salinity stress affected number of leaf, plant height, number of sprout, root weight, plant weight, leaf weight, total gel weight, root dry weight, Vitamin C and total soluble solids (TSS). Variance analysis also showed that sampling time relieves significant effect on number of leaf, plant height, root length, number of sprout, root weight, plant weight, leaf weight and total gel weight. All measured characteristics were highest for control. Interaction between salinity and sampling time on plant height, plant weight, leaf weight and total gel weight showed that these traits decreased in all salinity levels when sampling was 30 days after transplanting and the lowest value was related to highest salinity.