188宝金博页面版

第 40 卷第 6 期2012 年 11 月DOI:10. 3876/ j. issn. 1000 1980. 2012. 06. 012河 海 大 学 学 报 ( 自 然 科 学 版 )Journal of Hohai University(Natural Sciences)Vol. 40 No. 6Nov. 2012摇 摇 收稿日期: 2011 12 23基金项目: 国家自然科学基金(50839002);江苏省研究生创新计划(CXZZ11_0453)作者简介: 王君(1988—), 男,安徽合肥人,硕士研究生,主要从事灌溉排水理论与技术研究。 E鄄mail:wjman2006@163. com通讯作者: 俞双恩(1961—),男,安徽安庆人,教授,主要从事水土资源高效利用研究。 E鄄mail:seyu@ hhu. edu. cn水稻不同生育阶段稻田水位调控对产量因子及产量的影响王摇君1,2,俞双恩1,2,丁继辉1,2,胡摇 哲3,肖梦华1,2(1. 河海大学南方地区高效灌排与农业水土环境188宝金博页面版部重点实验室,江苏 南京摇 210098;2. 河海大学水利水电学院,江苏 南京摇 210098;3. 浙江省桐乡市水利局,浙江 桐乡摇 314500)摘要: 以稻田水位作为调控指标,对水稻分蘖期、拔节孕穗期、抽穗开花期和乳熟期进行受旱试验,根据试验资料分析水稻不同生育期受旱对产量及其构成因子的影响。 研究表明:水稻分蘖期受旱,对有效穗数最为不利,反而复水后会使穗粒数、结实率有所增加,对千粒质量影响不大,如分蘖期严重受旱,将导致严重减产;拔节孕穗期对水分很敏感,受旱对穗粒数和结实率均产生不利影响,会严重降低产量,而对千粒质量影响并不显著;抽穗开花期受旱对穗粒数、结实率和千粒质量均产生不利影响;乳熟期受旱主要对千粒质量产生不利影响。 通过灰色关联度分析,得出水稻产量构成因子对产量贡献最大的为有效穗数。关键词: 水稻受旱;稻田水位;产量因子;灰色关联度分析中图分类号:S511摇 摇 摇 文献标志码:A摇 摇 摇 文章编号:1000 1980(2012)06 0664 06Effects of paddy field water level control onyield factor and rice yield at different rice growth stagesWANG Jun1,2, YU Shuangen1,2, DING Jihui1,2, HU Zhe3, XIAO Menghua1,2(1. Key Laboratory of Efficient Irrigation鄄Drainage and Agricultural Soil鄄Water Environment in Southern China,Ministry of Education, Hohai University, Nanjing 210098, China;2. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China;3. Tongxiang Municipal Bureau of Water Resources, Tongxiang 314500, China)Abstract: Experiments were conducted to study rice drought during the tillering stage, jointing and booting stage,sprouting and blooming stage, and milky ripe stage, with the water level of the paddy field being the control index.The effects of rice drought during different growth stages on the yield and its component factors of rice were studiedbased on the test data. The results show that rice drought at the tillering stage is most unfavorable to the effectivepanicle number, but after re鄄watering it will make the grain number per spike and seed setting rate increase andhave an insignificant effect on 1000鄄grain weight; if rice at the tillering stage experiences serious drought, it willcause a sharp decline of yield; rice at the jointing and booting stage is quite sensitive to water, so drought at thisstage will seriously cut the yield and have an unfavorable effect on the grain number per spike and seed setting rateand an insignificant effect on 1 000鄄grain weight; rice drought at the sprouting and blooming stage has anunfavorable effect on the grain number per spike, seed setting rate, and 1000鄄grain weight; and rice drought at themilky ripe stage has an unfavorable effect on 1 000鄄grain weight. Through grey relational grade analysis, it wasfound that the component factor of rice yield that contributes the most to the yield of rice is the effective paniclenumber.Key words: rice drought; water level of paddy field; yield factor; grey relational grade analysis