Effects of basal Se fertilizers on yield and contents of trace elements of naked oat

A field experiment was carried out in a naked oat field on yellow river beach to study effects of basal Se fertilizers (570~1143 g/ha for Na2SeO3?5H2O) on the contents of trace elements of forage and grain of naked oats in order to seek new approaches to enhance nutritional levels of naked oats. The results show that: 1) Basal Se fertilizer could raise the biomass significantly, forage yield was raised by average 9.33% (P0.05) in flowering stage，while there were no significant effects on grain yield. 2) The capacities of absorbing selenium from soil fertilizers by naked oats are stronger and as well the transformation from inorganic selenium to organic selenium and from the fertilizers to stems, leaves and grains. 3) The basal Se fertilizers could enhance the contents of Cu, Zn and Se of oat hay significantly (P0.05), while the contents of Fe、Mn and Co are not increased. When application rate of the Se fertilizers is 954 g/ha, the contents of Cu, Zn and Se were enhanced by 9.31% (P＜0.05), 13.22% (P0.05) and 281.25%(P0.05), respectively. 4）The basal Se fertilizers could enhance the contents of Fe，Cu，Zn and Se of naked oat grains significantly (P0.05), while there are no more apparent effects on Mn and Co. When the application rate of the Se fertilizers is 954 g/ha, the contents of Cu, Zn and Se have optimal effects and are enhanced by 7.92 % (P0.05)、5.75%（P＜0.05）and 18.75% (P0.05), respectively. When the application rate of the Se fertilizers is 765 g/ha, the content of Fe has optimal effects and is enhanced by 10.19% (P0.05). In a word, naked oats have stronger capacities to absorb and transfer Se from soil basal fertilizers, rational basal application of Se fertilizers could not only enhance the contents of Cu, Zn and Se of forage in florescence, but also enhance the contents of Fe, Cu, Zn and Se of grains as well, the optimum of basal Se fertilizer range is from 765 g/ha to 954 g/ha.