Growth of Jatropha curcas L. plants under salt andnutrition stress
2017
The objective of this study was to evaluate the effects of nutrition and salt stress on the growth and
accumulation of mineral elements in Jatropha curcas plants. The work was conducted in greenhouse
with 100% solar radiation interception, at Goias State University, Ipameri Campus, Goias, Brazil. The
experiment was set up in five-liter containers following the completely randomized design in 4 x 2
factorial arrangement (I: Clark’s complete nutrient solution, Clark’s nutrient solution modified to prevent
contents of ii: nitrogen, iii: potassium or iv: magnesium, and two salinity treatments, distilled water and
saline water [2 dS m–1] obtained by NaCl addition). On even days, the plants received nutrient solution
and on odd days, they received saline or distilled water. The plants were irrigated with complete
nutrient solution up to the 20th day after germination and the treatments were applied from the 21st to
the 60th day. The results show that there was no toxic effect of salt on J. curcas plants; however,
salinity caused nutritional unbalance and significantly hindered Ca2+ and K+ absorption and slightly
reduced vegetative growth due to the small change in water status. J. curcas plants are moderately
tolerant to irrigation water salinity.
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