[Abstract]:The naked oats are the main oat species of our country, have the function of reducing blood lipid and reducing blood sugar, and the consumption has been in the fast-growing state in recent years. Selenium is a necessary trace element in mammals and has a significant anti-oxidation function. There is a shortage of selenium in the main production areas of most nude oats in our country. This study was conducted in 11 experimental stations in Zhangjiakou Dam of Hebei Province and 11 experimental stations in the national oat buckwheat industry in 2012-2014. The technical effect of selenium fertilizer production and the mechanism of selenium absorption were studied in order to clarify the effect of selenium fertilizer on the production of naked oats. It provides theoretical basis and technical measures for the production of selenium-rich oat. The results showed that the genotype of naked oats had a significant effect on the selenium absorption rate (P0.05). The grain selenium content in two years increased by 677. 8%-124.8%-124.8% and 707. 4%-2466. 7%, respectively. Among the varieties with strong selenium absorption capacity, there were No. 5, No. 5 Jinyan No. 5 and No. 1 of dam No. 1. The two-year spraying of selenium fertilizer increased by 677. 8%, 95.3. 6%, 864. 6% and 707. 4%, 792. 4%, 1384. 3% respectively. Medium selenium absorption capacity was 2, Jinyan No. 13, and the two-year spraying of selenium fertilizer increased 1161. 7%, respectively. The content of selenium (P 0.05), selenium content in the grain of dam No. 1 was significantly increased (P0.05). In 2013, the selenium content was 52.8% -1092. 9% and 654. 5% -1258. 2% respectively in 2013 and 2014. The two years were treated with C5 (three-leaf stage), and one selenium fertilizer (2100g 路 hm-2) was sprayed twice. The content of selenium (8400g 路 hm -2) of selenium fertilizer was 8400g 路 hm -2) at heading stage and mature stage (8400g 路 hm -2), the content of selenium was 83. 5 ug 路 kg-1, 74. 7 ug 路 kg-1 respectively, and the content of crude protein of naked oats was significantly increased by spraying selenium fertilizer (P0.05). 2. 1%-18. 9%, 2.6%-12. 7% higher than CK in two years. The increase of nitrogen fertilizer can enhance the absorption of selenium. Compared with the control grain, the content of selenium in six treatments was 7. 3% -31. 3%, 4. 2% -19. 1% higher than that of the control grain, respectively. The two years were N4 treatments (three-leaf period, the pulling-out period was N180kg 路 hm ~ 2, 210kg 路 hm-2, the three-leaf period and the pulling-out period), and the selenium fertilizer was sprayed with 1500 g 路 hm -2, respectively. The content of selenium (P0.05) was the highest (P0.05). The content of selenium was increased significantly (P0.05). 3 treatments (T3: leaf surface selenium fertilizer treatment, T4: water retention agent + leaf selenium fertilizer, T5: bio-organic fertilizer + leaf selenium fertilizer) were 66.2%, 62.2%, 10.8% and 3993.5% respectively. The application of bio-organic fertilizer could significantly improve the grain number and seed yield (P0.05). The yield of grain was increased by 6.8% and 9.5%, respectively. The grain yield was increased by 17. 2% and 20.7%, respectively. The crude protein content of grain increased by 27. 4%, 29. 8% and 10.6%, 12.2%, respectively. The grain selenium content of white Yan 2 was significantly increased under different habitat conditions (P0.05). The two-year increase range was 26. 8%-100. 0%, 42. 0%-93.3%, respectively. The selenium content of naked oats was different under different habitats, and the selenium content was 153. 0 ug 路 kg-1 and 208. 983 路 kg-1, respectively. The number of spikelet, spike number and grain weight of naked oats were significantly increased (P0.05). The selenium content of naked oat root was higher than that of stem and leaf, and the content of selenium in stems and leaves showed a slow decrease with the increase of selenium concentration in the root of growth and development. The accumulation of selenium in bare oats and leaf selenium was similar to that of non-fertilization. The changes of selenium accumulation in stem and selenium increased slowly along with the growth period-rapid descent-slow descent of the inverted S-type curve. The selenium concentration in different organs of bare oats was significantly increased (P <0.05). The heading stage is the stem of the root, and the mature stage is the leaf stem of the root, and is characterized by two poles.
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