تأثیر مقادیر مختلف نانوذراتپتاسیم بر عملکرد بیولوژیکی و رنگیزههای فتوسنتزی سویا

To evaluate effect of Nano-potassium on the concentration of photosynthetic pigments (Chlorophyll a, b, total chlorophyll and carotenoid) and biomass of soybean a field experiment was conducted based on randomized complete block design with three replications at The Research Farm of Shahid Beheshti Agriculture College in 2013. Treatments were eight levels of Nano- potassium: included 0, 5, 10, 15 kg/ha soil application, and 0 (water spray), 1, 2 and 3 g/l spraying of Nano-potassium particles. Results of ANOVA showed the significant effect of Nano potassium on the Chlorophyll a, b, total chlorophyll, carotenoid and biomass. The highest content of Chlorophyll a (0.00165 mg/l) was obtained from plants treated by 5kg/ha soil application of Nano-potassium, and the lowest one (0.0049 mg/l) belonged to 1g/l of spraying. The highest content of chlorophyll b (0.00087 mg/l), total chlorophyll (0.0025 mg/l), and carotenoid (0.59 mg/l) were obtained from 5kg/ha of Nano-potassium. The lowest concentrations of chlorophyll b (0.00033 mg/l) was observed at control treatment (without potassium application), but total chlorophyll (0.00084 mg/l) and carotenoid (0.27 mg/l) were observed in spraying of 1 g/l potassium. The maximum (137.667 g/plant) and minimum (35.53 g/plant) biomass were respectively obtained from 10 kg/ha Nano-potassium and water spraying.