| Effects of spraying a blended plant growth regulator on the tillering,growth, and the cold\|resistance of different wheat varieties |
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| DOI：10.7606/j.issn.1000-7601.2019.01.19 |
| Key Words: plant growth regulator winter wheat tillering in the winter growth cold\|resistance yield |
| Author Name | Affiliation | | PENG Jing | Northwest A&F University, College of Life Science, Yangling, Shaanxi 712100, China | | YANG Xue | Northwest A&F University, College of Life Science, Yangling, Shaanxi 712100, China | | LUO Meng\|na | Northwest A&F University, College of Life Science, Yangling, Shaanxi 712100, China | | LIU Xi\|ping | Northwest A&F University, College of Life Science, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Effects of spraying a blended plant growth regulator, which had got the national invention patent, on the tillering, growth, cold\|resistance, and yield of different winter wheat varieties(Xinong 979, Xinong 889, Zhengzhou 831, and Xiaoyan 22) were compared in a field experiment. On the 45th day after sowing, the plant growth regulator was sprayed on the leaf surface. The results showed that the application of the blended plant growth regulator significantly improved the tillering in the winter and increased above\|ground biomass of Xinong 979, Xinong 889, and Zhengzhou 831 while only Xiaoyan22’s tiller number and biomass were not significantly affected. Meanwhile, the contents of chlorophyll, carotenoid, soluble sugar,starch, soluble protein,free proline, and the activities of SOD and POD in the leaves of Xinong 979 were increased sharply after spraying the plant growth regulator, whereas the content of MDA was significantly lower than that of the control, and glutathione and ascorbic acid contents were not impacted significantly. Hence, the cold\|resistance of Xinong 979 was enhanced. For the other three varieties, the physiological and biochemical parameters relating to the cold\|resistance were not impacted by the application of the plant growth regulator. In addition, the spike number per plant of Xinong 979, Xinong 889, and Zhengzhou831 were increased by 19.0%, 17.8%, and 5.3%, while the yield per hectare increased by 16.9%, 16.2%, and 5.9%, respectively, but the yield of Xiaoyan 22 was not affected. The results showed that effects of thegrowth regulator on the tillering and growth in the winter, the cold\|resistance, and yield varied with wheat varieties. For its application, Xinong 979 is the most suitable wheat variety based on increased tillers and growth in the winter as well as enhanced cold\|resistance and improved yield, but its effects on Xiaoyan 22 was negligible. |
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