Effects of Gibberellic Acid·Indol-3-Ylacetic Acid·Brassinolide Mixing with Rice Paddy Herbicides on Photosynthesis and Yield of Rice
To investigate effects of rice paddy herbicides mixing with plant growth regulator gibberellic acid·indol-3-ylacetic acid·brassinolide 0.136％ WP on photosynthesis and yield,the pot experiment was conducted taking Minghui 63 as subject.The treatments involved penoxsulam 25 g/L OD at 1200 mL/hm2 and florpyrauxifen-benzyl 3％ EC at 1200 mL/hm2,as well as their respective mixture with gibberellic acid·indol-3-ylacetic acid·brassinolide 0.136％ WP at 45 g/hm2 .Compared to the treatment of penoxsulam or florpyrauxifen-benzyl applied alone,their mixture with gibberellic acid·indol-3-ylacetic acid·brassinolide improved in photosynthesis at heading and flowering stages of rice,and both Gs and Tr were significantly increased .The number of filled grains per panicle,seed setting rate,1000-grain weight and actual yield per bucket during the rice mature stage were significantly improved,with improvements of 11.86％ and 18.54％,6.10％ and 9.24％,7.86％ and 13.18％,21.05％ and 36.25％,respectively.In summary,gibberellic acid·indol-3-ylacetic acid·brassinolide 0.136％ WP mixing with penoxsulam 25 g/L OD or florpyrauxifen-benzyl 3％ EC could promote photosynthesis and improve yield traits,thereby increasing yield in rice paddy.
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