Effect of phosphorus on the content of vitamin E in different soybean cultivars | 磷素对不同大豆品种籽粒维生素E含量的影响

[Objective] This study aimed to explore the effects of phosphorus on the contents of vitamin E in different cultivars of soybean grains and find the optimum application amount of phosphorus for different genotypes of soybean cultivars, in order to increase the contents of vitamin E in soybean grains and improve the qualities. [Method] Three soybean cultivars were selected as experimental materials, including Heinong 48 (high-protein cultivar), Heinong 37 (intermediate cultivar) and Heinong 44 (high-oil cultivar). The soybeans were planted in pots, with 0.033 g/kg soil of N and K2O, four phosphorus treatments were set, respectively applied with 0 (P1), 0.033 (P2), 0.067 (P3) and 0.100 (P4) g /kg soil of P2O5, and the total contents of vitamin E in different cultivars of soybean grains were determined by high-performance liquid chromatography method. [Result] The total contents of vitamin E in the same cultivar of soybean grains in P3 treatment were significantly higher than that in the other three treatments, the total contents of vitamin E in Heinong 37, Heinong 44 and Heinong 48 in P3 treatment had increased by 11.96%, 16.55% and 14.02%, compared with the control; among the three soybean cultivars in P2 treatment, the content of vitamin E in Heinong 37 was the maximum; among the 12 treatment combinations, the total contents of vitamin E in Heinong 44 in P3 treatment was the maximum. The contents of vitamin E in three soybean cultivars significantly varied among the various cultivars and different phosphorus treatments. [Conclusion] Application of phosphorus had affected the contents of vitamin E in three soybean cultivars, appropriate application amount of phosphorus was advantageous to improve the contents of vitamin E in soybean grains.