| In order to clarify the effects of different treatments on osmotic physiology and yield of oat in saline-alkaline land, the effects of control (CK), bio-fertilizer (F), rotten straw (S), and combined application of bio-fertilizer and rotten straw (FS) on K+, Na+ , soluble sugar, organic acids,plant height, and yield in organs of Baiyan 2 and Caoyou 1 at different growth stages were studied. The results showed that the accumulation of K+ and Na+ inorgans of oats were higher at seedling and jointing stages, and the accumulation of K+ and Na+ in stems and leaves were significantly higher than that in roots. S and FS treatments significantly increased K+ content, but significantly decreased Na+ content in roots, stems, and leaves.The treatments significantly affected the soluble sugar content of the two oat varieties in different periods.F treatment significantly increased the total organic acid content of the two oat varietiesat heading and filling stages, especially the proportion of oxalic acid, acetic acid, and citric acid. The total organic acid content of the two oat varieties at heading stage was significantly increased by S and FS treatments in the first year, but significantly decreased in the second year, which was mainly attributed to the changes in oxalic acid changes. After two years of improvement, F, S, and FS treatments significantly increased the grain yield, fresh and dry forage yield. Under the conditions of saline-alkaline environment, the combination of rotten straw and bio-fertilizer enhanced the osmotic physiological regulation ability of oat plants, improved their adaptability, promoted their growth, and significantly increased their yield.It is suitable for popularization and application in saline-alkaline area. |
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