| Effects of drought stress at booting stage on photosynthesis and yield of Super Rice |
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| DOI：10.7606/j.issn.1000-7601.2017.06.16 |
| Key Words: Super Rice booting stage drought stress photosynthetic performance yield |
| Author Name | Affiliation | | DUAN Su-mei | Agronomy College of Anhui Science and Technology University, Fengyang, Anhui 233100, China | | YANG AN-zhong | Agronomy College of Anhui Science and Technology University, Fengyang, Anhui 233100, China | | WU Wen-ge | Rice Research Institute Anhui Academy of Agricultural Sciences， Hefei, Anhui 23003, China | | CHEN Gang | Rice Research Institute Anhui Academy of Agricultural Sciences， Hefei, Anhui 23003, China | | XU You-zun | Rice Research Institute Anhui Academy of Agricultural Sciences， Hefei, Anhui 23003, China |
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| Abstract: |
| Using six super hybrid rice and one drought tolerance conventional rice variety as materials, performing drought treatment of -75 kPa for 6 day by pot experiment under greenhouse condition, this study aims to investigate the effects of drought stress at booting stage of rice on photosynthesis and yield.The results showed that under drought stress, flag leaf SPAD and photosynthetic rate of the six super hybrids decreased at the first-earing phase (0～7 d), but increased at the first-earing phase (14～21 d). LAI,, effective LAI and high-effective LAI were decreased. The size of panicles was reduced by 3.9%～6.8%, and the filled spikelets per panicle by 7.0%～18.5%. The thousand seed weight was increased by 1.8%～5.1%, and the yield decreased by 10.4%～17.2%. Under control condition, grain yield were in the order of Yliangyou 2,Xinliangyou 6, and Fengliangyou 4. The yield of Yliangyou2 was 23.2%～27.5% higher than the bottom third varieties. Results showed that the yield of the six super hybridization rice were higher than the drought tolerance conventional rice variety under the condition of the conventional irrigation or under the drought stress at seedling stage. Therefore, the three varieties of Yliangyou2, Fengliangyou4, Xinliangyou6 are recommended for Jianghuai Hilly Region of Anhui Province. |
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