Effect of nutrient management combined with chitosan spraying on yield and nutritional value of sunflower sprouts
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Abstract
Hydroponic sunflower sprouts production using nutrient management resulted in an increased yield and nutritional value. This research was conducted to study the optimal concentration of Hoagland nutrient solution combined with chitosan spraying on germination, yield, and nutritional value of sunflower sprouts. The experiment was designed using a split-plot in a randomized complete block design (RCBD) with four replications. The main plot was the concentration of Hoagland nutrient solution at three levels, namely 0, 0.5x, and 1x. The sub-plot was chitosan at four levels, namely 0, 20, 40 and 80 ppm. The results showed that different concentrations of Hoagland nutrient solution did not affect the germination, speed of germination, leaf width, fresh weight and carotenoid content. However, these solutions caused significant differences in shoot length, leaf length, phenolic compound content and antioxidant activity. Hoagland solution 1x caused higher shoot length and antioxidant activity than other concentrations. Meanwhile, spraying with different concentrations of chitosan did not cause significant differences in germination, speed of germination, shoot length, leaf length and width, and antioxidant activity. However, chitosan caused significant differences in fresh weight, phenolic compound and carotenoid contents. Spraying with 80 ppm chitosan caused higher fresh weight and phenolic compound content than other concentrations. Therefore, growing sunflower seedlings in Hoagland 1x solution and spraying with 80 ppm chitosan would increase speed of germination, yield, phenolic compound content, and antioxidant activity.
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