In this study, a special security features additives of seed coating agent named NA-SR was developed based on 'Naian Hercules', which was dedicated for soybean and rice. Two independent experiments were conducted to find out if the seed coating has some side effect, and to verify the effect of NA-SR in reducing this side effect. The temperature stress experiments in the earlier stage of germination showed that germination delay was the result of osmotic potential degradation caused by the polymer-coating at 25?, while there are no significant differences in the later stage. However, the germination potential, germination index and vigor index could be significantly decreased by seed coating in soybean after the ten days cold stress at 10?. It was worth noting that the NA-SR could increase the germination potential, plant height and vigor index of seed, which prevented the occurrence of side effects to some extent. As showed in pot experiment, the imidacloprid in seed coating could inhibite the seed germination and seedling growth. By measuring the physical properties of NA-SR+seed-coating treated (treatment 1) and only seed-coating treated plant (treatment 2), we found that, under treatment 1, the plants were more superior than them in treatment 2 in accumulation rate of free proline, cell permeability, and Peroxidase activity (=56.1%). These results suggested that NA-SR could improve the stress tolerance to offset the side effects caused by seed coating. Apart from this, the pot experiment also demonstrated that the seed coating may affect the nodule number and dry matter accumulation of soybean, while NA-SR had some effect on reduce this influence. According to the results of above experiment, we can concluded that NA-SR do has a special function on preventing and controlling the side effects of seed coating on soybean, and also could improve its stress tolerance in both germination and seedling stage.ACKNOWLEDGEMENTS1.This work was financially supported by the Special Fund for Agro-scientific Research in the Public Interest. (No. 201303030)

Research on the prevention and control technology of seed coating side effects in soybean and rice

248th National Meeting (2014)

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