| Effects of spraying NaHS at different periods on agronomic and yield traits of naked oats in saline\|alkali land |
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| DOI：10.7606/j.issn.1000-7601.2022.06.16 |
| Key Words: naked oat hydrogen sulfide saline\|alkali stress agronomic traits yield |
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| Abstract: |
| Field experiments were conducted to spray different concentrations of H2S donor sodium hydrosulfide (NaHS) at different growth periods of naked oats (Avena nuda) in 2020 and at the heading stage of naked oats in 2021 to examine the effects of H2S on agronomic and yield traits of naked oats under salt\|alkali stress. The 2020 test results showed that the spraying period had a significant effect on plant height， grain number per plant， yield per plant， harvested ears， 1000-grain weight and yield. The NaHS concentration had no significant effect on plant height and 1000-grain weight， but it significantly affected the grain numbers per plant， yield per plant， harvested ears and yield. Except for the insignificant influence on plant height， the interaction between the two had a significant influence on the other above\|mentioned indexes. Plant height， grain numbers per plant， yield per plant， harvested ears， 1000-grain weight and yield were all sprayed at the heading stage to the highest.The grain numbers per plant， yield per plant， harvested ears and yields showed an overall trend of increasing first and then decreasing with the increase of NaHS concentration. Among them， the yield of 200 μmol·L-1NaHS sprayed was the highest. The grain numbers per plant and the yield per plant were the highest when spraying 100 μmol·L-1 and 50 μmol·L-1 NaHS at the heading stage， respectively. The harvested ears and 1000-grain weight were the largest by spraying 200 μmol·L-1 and 50 μmol·L-1 NaHS at the heading stage， respectively. The best yield was to spray 200 μmol·L-1 NaHS at the heading stage. Comprehensive analysis of membership function showed: spraying 200 μmol·L-1 NaHS at the heading stage had the best effect on improving the agronomic yield traits of naked oats.The test results in 2021 showed that: spraying different concentrations of NaHS at the heading stage had no significant effects on the plant height， harvested ears and thousand\|grain weight of naked oats. Compared with spraying 0 μmol·L-1 NaHS， spraying 25~400 μmol·L-1 NaHS increased spike boll numbers， spike grain numbers and the yield of naked oats to varying degrees. Among them， the effect of spraying 200 μmol·L-1NaHS was the most significant. In summary， spraying 200 μmol·L-1 NaHS at the heading stage effectively promoted the agronomic traits and yield of naked oats， such as the spike boll numbers and spike grain numbers. |