Effects of Nano-selenium Plant Nutrients on Yield and Quality of the Astragalus membranaceus

doi:10.11924/j.issn.1000-6850.2014-0696

Abstract

Abstract: Using nano- selenium plant nutrients as test material, the authors studied the effect of different application amount of nano- selenium plant nutrients on the under- ground and above- ground parts growth, quality and yield of Astragalus membranaceus after two years tracking test. The results showed that plant nutrients of nano-selenium below 225 kg/hm2 had promoting effect on the under-ground and above-ground parts growth, yield and quality of Astragalus membranaceus. The optimized yield was 14588.89 kg/hm2, which was 16.30% higher than that of the control, with very significant difference. The maximum astragaloside IV content was 0.143%, with 47.4% over the control (0.097%). The maximum extracts contents were over 40%, 3%-5% higher than CK. In general, proper amount of selenium fertilizer could promote growth, increase the yield and improve the quality of Astragalus membranaceus.

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