| Cite this article: | 甄博,周新国.孕穗期高温与涝对水稻光合特性和产量的影响[J].灌溉排水学报,0,():-. |
| zhenbo,zhouxinguo.孕穗期高温与涝对水稻光合特性和产量的影响[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Effects of high temperature and waterlogging on Photosynthetic Characteristics and yield of rice at booting stage |
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zhenbo, zhouxinguo
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Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences
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| Abstract: |
| Abstract【Objective】 In Huang Huai Region, single cropping rice is prone to extreme high temperature and precipitation events at jointing and booting stage, and rice is vulnerable to double stresses of high temperature and waterlogging. The purpose of this paper is to investigate the effects of high temperature and waterlogging stress at booting stage on Photosynthetic Characteristics and yield of rice.【Method】Pot experiments were conducted to analyze the photosynthetic characteristics and yield changes of rice under different high temperature and waterlogging stress at booting stage. Four treatments were set up as follows: waterlogging stess(water depth 15cm,T1) , high temperature stress(T2), high temperature×waterlogging stress(water depth of 15cm,T3), as well as a regular irrigation with shallow water (water depth of 0-5 cm) except for yellow maturity (CK). After stress treatment, the rice SPAD, Photosynthetic Characteristics and yield factors were observed. 【Result】After the stress at booting stage, compared to CK, T2 treatment decreased photosynthetic rate of rice significantly by 30.77% ,T3 treatment increased SPAD value, photosynthetic rate and stomatal conductance of rice leaves, especially stomatal conductance increased by 51.90% compared with CK; the shoot drying weight of all stress treatments were lower than that of CK, until maturity, the shoot drying weight of T1, T2 and T3 treatments were lower than that of CK. Compared to CK, T2 and T3 treatments reduced rice yield by 80.09% and 12.33%, and 1000 grain weight decreased by 16.31% and 11.86% respectively, 1000 grain weight and yield of T2 treatment decreased by 5.05% and 77.29% respectively compared with T3.【Conclusion】In the case of high temperature weather at booting stage, the water layer in the field can be kept about 15cm, which can alleviate the heat damage caused by high temperature to rice |
| Key words: rice; high temperature and waterlogging stress; SPAD; Photosynthetic Characteristics; yield |
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