| 播种期对单季稻的颖花退化及产量影响 |
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| 引用本文： | 徐刚勇,周爱珠,刘才高,金芳燕,曹春信,刘新华.播种期对单季稻的颖花退化及产量影响[J].安徽农业科学,2013(36):13869-13870,13872. |
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| 作者姓名： | 徐刚勇 周爱珠 刘才高 金芳燕 曹春信 刘新华 |
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| 作者单位： | 衢州市衢江区农作物管理站,浙江衢州,324000;金华市农业科学研究院,浙江金华,321000 |
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| 基金项目： | 国家水稻产业技术体系项目（CARS-01-50）. |
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| 摘 要： | 目的]研究确定杂交稻新组合甬优12和浙优18的适宜播种期.方法]以水稻品种新组合甬优12和浙优18为材料,设置6个不同时期进行播种,重点考查水稻的颖花退化和产量指标.结果]试验得出,随着播种期延迟,甬优12和浙优18的始穗期、齐穗期、成熟期推迟,全生育期缩短,同时颖花退化率出现先升后降的波动变化.不同播种期影响水稻的有效穗数、千粒重等产量构成因子,在该试验范围内,甬优12和浙优18的产量均以5月10日播种最高,其次为5月25日播种,播种期过迟出现结实率下降、产量骤减.结论]水稻品种甬优12和浙优18在浙江衢州地区的最适宜播种时间为5月中旬前后.
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| 关 键 词： | 水稻 播种期 颖花退化 产量 |
Effects of Rice Sowing Date on Floret Degeneration and Yield |
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| Institution: | XU Gang-yong( 1.Qujiang District Crop Management Station of Quzhou City, Quzhou ,Zhejiang 324000;) |
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| Abstract: | Objective] The aim was to research the suitable sowing date of two new rice varieties,Yongyou 12 and Zheyou 18.Method] The influence of six sowing dates on rice floret degeneration and yield was investigated.Result] The results showed that the initial heading stage,full heading stage and mature stage of Yongyou 12 and Zheyou 18 were delayed with the prolonging of sowing date,and the whole growth periods shortened.Simultaneously,the floret degeneration rate first increased and then decreased with the prolonging of sowing date.Different sowing dates affected yield component factors,including effective panicle number and thousand grain weight.The highest yields of both Yongyou 12 and Zheyou 18 were sowing on May 10th,followed by sowing on May 25th,and then the yield was suddenly decreased.Conclusion] The most suitable sowing date in Quzhou region of both Yongyou 12 and Zheyou 18 was at the middle of May. |
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| Keywords: | Oryza sativa Sowing date Floret degeneration Yield |
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