| 引用本文: | 郭立君,肖小平,程凯凯,等.深水灌溉对超级早稻陵两优268灌浆结实期高温热害的缓解效应*[J].灌溉排水学报,0,():-. |
| Guo Lijun,XIAO Xiaoping,CHENG Kaikai,et al.深水灌溉对超级早稻陵两优268灌浆结实期高温热害的缓解效应*[J].灌溉排水学报,0,():-. |
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| 深水灌溉对超级早稻陵两优268灌浆结实期高温热害的缓解效应* |
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郭立君, 肖小平, 程凯凯, 李 超, 杨 茜, 唐海明, 汤文光, 彭志红, 汪柯
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湖南省土壤肥料研究所
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| 摘要: |
| 【目的】进一步揭示深水灌溉对超级早稻灌浆结实期高温热害的缓解效应,明确适宜灌水深度。【方法】以超级早稻‘陵两优268’为材料,在自然高温热害条件下设置田间试验,处理为：常规灌溉(灌水深度2.5 cm,对照)、灌水深度5 cm、7.5 cm、10 cm 4个灌水深度,测定水稻群体温度、剑叶生理指标、水稻产量及其构成因子,分析深水灌溉对超级早稻灌浆结实期高温热害的缓解情况。【结果】深水灌溉超级早稲群体平均温度降低0.6~1.9 ℃。增加灌水深度22 d后,超级早稻剑叶的SPAD 值衰减率比对照降低4.62~13.45个百分点,剑叶MDA含量降低1.89~2.51 nmol.g-1(湿重),剑叶过氧化氢酶(CAT)活性提高,渗透调节物质含量增加。随着高温热害持续发展和生育期推进,CAT活性下降,而POD、SOD活性提高,但深水灌溉对剑叶POD、SOD活性影响较小。水稻结实率提高2.88 %~5.06 %、千粒重提高0.53 g~0.93 g,产量增加2.9 %~7.9 %。【结论】深水灌溉能有效地缓解‘陵两优268’灌浆结实期的高温热害。灌水深度以7.5~10 cm效果较好。 |
| 关键词: 超级早稻;灌浆结实期;高温热害;深水灌溉;缓解效应 |
| DOI： |
| 分类号:S511；S275 |
| 基金项目:国家重点研发计划项目 |
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| Alleviating effect of deep water irrigation on high temperature and heat injury on super early rice‘Lingliangyou 268’ during grain-filling period |
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Guo Lijun, XIAO Xiaoping, CHENG Kaikai, LI Chao, YANG Qian, TANNG Haiming, TANG Wenguang, PENG Zhihong, EANG Ke
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Hunan Soil and Fertilizer Institute
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| Abstract: |
| 【Objective】The purpose of this paper is to reveal the mitigation effect of deep water irrigation on high temperature and heat damage during grain-filling period of super early rice, and to determine the suitable irrigation depth..【Method】With ‘Lingliangyou 268’ as test materia, field experiment was conducted with conventional irrigation (irrigation depth of 2.5cm) as CK and irrigation depth of 5 cm, 7.5 cm,10 cm under natural high temperature heat injury. The population temperature of rice, physiological indices of flag leaves, rice yield and its components indices were measured to study the effect of deep water irrigation on alleviating high temperature and heat injury of super early rice during grain-filling period.【Result】The results showed that the average temperature of super early rice population decreased by 0.6 ~ 1.9 ℃ with deep water irrigation. After 22 days, the SPAD attenuation rate of flag leaves of super early rice decreased by 4.62~13.45 percentage points compared with the control. MDA content of flag leaves decreased 1.89 ~ 2.51 nmol.g-1 (wet weight). The activities of catalase (CAT) was increased, and the content of osmoregulation substance was increased. With the continuous development of high temperature and heat damage and the growing of rice, the activities of CAT decreased, while the activities of POD and SOD increased, however, deep water irrigation had little effect on the activities of POD and SOD in flag leaves.Rice seed setting rate increased by 2.88 %~5.06 %,1 000 grain weight increased by 0.53 g~0.93 g, and rice yield increased by 2.9%~7.9%. 【Conclusion】Deep water irrigation could effectively alleviate the hazard of high temperature and heat damage of "lingliangyou 268" during grain-filling period.The best irrigation depth is 7.5 ~ 10 cm. |
| Key words: super;early rice,grain-filling;period,high;temperature heat;injury,deep;water irrigation, alleviating;effect |
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