| 播期对融水、三江超级稻头季稻及再生稻性状的影响 |
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| 引用本文： | 杨日,杨桂芬,龚志宏,李前琦,韦凤舞.播期对融水、三江超级稻头季稻及再生稻性状的影响[J].广西农业科学,2011(8):890-894. |
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| 作者姓名： | 杨日 杨桂芬 龚志宏 李前琦 韦凤舞 |
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| 作者单位： | 柳州市种子管理站;三江县种子管理站;融水县农业技术推广站; |
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| 基金项目： | 广西柳州市科技技术研究与开发计划项目(2007030703) |
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| 摘 要： | 【目的】探讨超级稻再生稻适时播种期,为充分利用山区光、温、水资源,指导山区农民适时播种,合理衔接超级稻、再生稻与油菜生育期提供技术指导。【方法】对比融水、三江两县不同播期对超级稻头季稻及再生稻生物学、经济学性状的影响。【结果】超级稻播期每推迟5d,头季稻叶龄、基本苗、最高苗数、有效穗数增加,始穗期、齐穗期、成熟期后推1～4d,全生育期缩短1～4d,成穗率、穗粒数、实粒数、产量降低;再生稻生育期延迟,其生物学、经济性状均呈退化趋势;在气候条件允许情况下,留低桩,延长营养生长期,有利于获得高产。【结论】海拔140m以下地区,超级稻宜在3月中下旬早播,最迟不超过4月8日,再生稻留10-20cm低桩,通过促大穗大粒获得高产;海拔250m以上中稻地区,超级稻宜3月19-24日播种,最迟不超过4月3日,再生稻留高桩,保留倒2节,通过提高有效穗而获得高产。
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| 关 键 词： | 超级稻 头季稻 再生稻 播期 性状 |
Effect of different sowing dates on characteristics of first and ratoon super rice crops |
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| YANG Ri,YANG Gui-fen ,GONG Zhi-hong ,LI Qian-qi,WEI Feng-wu.Effect of different sowing dates on characteristics of first and ratoon super rice crops[J].Guangxi Agricultural Sciences,2011(8):890-894. |
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| Authors: | YANG Ri YANG Gui-fen GONG Zhi-hong LI Qian-qi WEI Feng-wu |
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| Institution: | YANG Ri1,YANG Gui-fen1 *,GONG Zhi-hong 1,LI Qian-qi2,WEI Feng-wu3 (1 Liuzhou Seed Management Station,Liuzhou,Guangxi 545002,China,2 Sanjiang Seed Management Station,Sanjiang,Guangxi 545500,3Agricultural Technology Extension Station of Rongshui County,Rongshui,Guangxi 545300,China) |
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| Abstract: | Objective]The present experiment was conducted to investigate suitable sowing dates for super rice in order to regulate the growth duration of first and ratoon croppings of rice and rape. Method]The super rice variety Zhongzheyou 1 was used to compare the morphological and economical characteristics of first and ratoon crops for super rice sown on different sowing dates (19th, 24th and 29th March and 3rd and 8th April) in Rongshui and Sanjiang counties. Result]The results showed that the leaf-age, basal ... |
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| Keywords: | super rice first rice crop ratoon cropping sowing stage |
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