Effects Of Application Selenium Fertilizer On Millet

Selenium is one of the essential trace elements which plays important roles in normal physiology of human body. Food which absorb selenium from the soil directly or indirectly, are main sources for human beings to get selenium. However, the distribution of selenium in the soil is extremely limited on the earth's surface. The lack of selenium is especially serious in some areas(For example,about 30% of the national territory of China are selenium shortage seriously). So to develop the Se-enriched food is very important for meeting the demand of selenium of the human body. In this paper, we do experiments in the following aspects: variety different Se-enriched of millet, different fertilizing methods of seleminu and different period application of selenium by field and pot methods, respectively, to explore the effect of Se-riched differences of millet, selenium on growth characteristics and grain quality, which will enrich the theory basis of exploiting Se-enriched millet.The field experiment was carried out to screen of Se-enriched and High quality traits in millet. The result showed that Se contents in grains of the nine varieties of millet were appeared to be greatly diversified, the average contents of selenium was 0.075mg/kg and deviation range was 0.053～0.152 mg/kg. Moreover, protein contents and yield in millet landraces germplasms exhibited wide genetic diversity, showed that protein and selenium of Jingu29 was highest, the yield of JiGu 20 was the highest.The field experiment was carried out to study the effects of foliar application of Na2SeO3 on contents of Se, protein, soluble sugar and lysine acid in grains. The results showed that the two treatments (60 g/hm2 and 120 g/hm2) of foliar application Na2SeO3 could increase Se contents in grains of the seven varieties of millet up to 1.022~1.644 mg/kg and 1.853~2.269 mg/kg, which were 15.4 and 23.8 times higher than those in control treatment respectively. Moreover, the grain yields of the seven varieties of millet showed negative correlation with foliar application of Na2SeO3. There was significant increase of protein contents in most the varieties of millets with foliar application of Na2SeO3. The soluble sugar and lysine acid in grains of Jigu22 were increased significantly by foliar application of Na2SeO3, but the soluble sugar of Jingu34 was reduced significantly, while there were no significant effects on the other varieties of millet. The field experiment was carried out to study the effects of different-period application of selenium on contents of Se and quality in grains of millet. The results showed that Se content of the three varieties of millet (Foxtail Millet, Jingu29,Jiyou.No.2) was increasing with the plants growing:CK< jointing stage < full heading stage < grain filling stage. There was increasing protein and soluble protein contents in grain of millets with different-period application of selenium(150g/hm2). The application of selenium in late stage would increase soluble sugar content more than early and application of selenium in full heading stage would increase lysine content in grain of millet.The pot experiment of planting two cultivars (Jiyou.No.2 and Jingu 34) was carried out to study the effect of seed dressing with selenium on Se concents and growing of millet. The results showed that Se contents was increased with the increasing of selenium supply and was significantly correlated in shoot and root, roots was significantly higher than above ground parts of millet. Moreover, emergence, survival and dry matter accumulation of millet was increased with the proper level of selenium supply,but they were inhibited the high level of selenium and the two varieties of millet slightly difference.A field experiment of was carried out to study the effect of different fertilizing methods of selenium on concentration and distribution, grain quality and the kinetics parameters of chlorophyll fluorescenc of millet (Jiyou.No.2). The results showed that Se content in grain was significantly related with the increase of selenium supply (0-30g/hm2). Effect of foliar application of selenium on Se content in grain was significantly higher than seed dressing with selenium. The distribution of Se content in organs of blank were root > leaf > stem>grain. The distribution of Se content in organs of seed dressing treatments were root>leaf> grain >stem, the proportion of Se concent in root increased significantly with the increase of selenium supply. The distribution of Se content in organs of spraying selenium treatments were leaf>root> grain >stem. The proportion of Selenium concent in leaf increased significantly with the increase of selenium supply. The two fertilizing methods of seleminu had no significant influence on the yield of the millet. foliar application of selenium improved photosynthetic efficiency of millet, which help to improve grain quality. Proteinand lysine contents in grain was increased the spraying selenium favorable than the seed dressing.