| 氮肥运筹对湘南双季杂交稻产量与抗倒伏特性的影响 |
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| 引用本文： | 苏雨婷,袁帅,李永松,崔璨,陈平平,王晓玉,易镇邪.氮肥运筹对湘南双季杂交稻产量与抗倒伏特性的影响[J].作物杂志,2022,38(3):225-103. |
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| 作者姓名： | 苏雨婷 袁帅 李永松 崔璨 陈平平 王晓玉 易镇邪 |
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| 作者单位： | 湖南农业大学农学院/南方粮油作物协同创新中心,410128,湖南长沙 |
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| 基金项目： | 国家重点研发计划“粮食丰产增效科技创新”重点专项(2017YFD0301501);国家重点研发计划“粮食丰产增效科技创新”重点专项(2018YFD0301005) |
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| 摘 要： | 为探究不同氮肥运筹方式对湘南双季杂交稻产量与抗倒伏能力的影响,以早稻品种陆两优996和株两优819,晚稻品种H优518和盛泰优018为材料,于2019-2020年在湖南省衡阳县开展大田试验,比较研究3个基蘖肥、穗肥、粒肥比例（N1：7:2:1,N2：6:3:1,N3：5:4:1）对双季稻产量和抗倒伏性状的影响。结果表明,氮肥运筹方式对双季稻产量有显著影响,N2处理对产量构成因素协调效果最好,产量最高;各品种在基蘖肥比例为50%~60%的条件下,抗折力较大,倒伏指数较小,但个别品种表现出年际间差异;与N1处理相比,N2和N3处理株高较矮、重心较低、茎壁较厚、节间较短且节间充实度较高,N2和N3处理间差异不显著。相关分析表明,提高抗倒伏能力的关键在于降低株高、重心高度和单茎鲜重,提高倒4节间茎秆粗度和充实度。综合考虑各品种倒伏指数和产量性状,基蘖肥、穗肥、粒肥比例为6:3:1的处理能够较好地协调水稻的产量性状与抗倒伏能力,达到高产和抗倒的目的。
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| 关 键 词： | 双季稻 湘南 氮肥运筹 产量 抗倒伏 |
| 收稿时间： | 2021-04-09 |
Effects of Nitrogen Fertilizer Management on Yield and Lodging Resistance Properties of Double-Cropping Hybrid Rice in Southern Hunan |
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| Su Yuting,Yuan Shuai,Li Yongsong,Cui Can,Chen Pingping,Wang Xiaoyu,Yi Zhenxie.Effects of Nitrogen Fertilizer Management on Yield and Lodging Resistance Properties of Double-Cropping Hybrid Rice in Southern Hunan[J].Crops,2022,38(3):225-103. |
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| Authors: | Su Yuting Yuan Shuai Li Yongsong Cui Can Chen Pingping Wang Xiaoyu Yi Zhenxie |
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| Institution: | College of Agronomy, Hunan Agricultural University/South Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410128, Hunan, China |
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| Abstract: | To explore the effects of different nitrogen fertilizer management modes on yield and lodging resistance of double-cropping hybrid rice in southern Hunan, field experiments were conducted with early rice varieties Luliangyou 996 and Zhuliangyou 819 and late rice varieties H you 518 and Shengtaiyou 018 as materials for comparative study of the effects of three proportion of basal and tiller fertilizer, panicle fertilizer, and grain fertilizer (N1: 7:2:1, N2: 6:3:1, and N3: 5:4:1) on yield and lodging resistance of double-cropping rice in Hengyang county, Hunan province, in 2019-2020. The results showed that nitrogen management mode had a significant effects on the yield of double-cropping rice. The N2 treatment had the best coordination effects on the yield components and the yield was the highest. Under the condition of 50%-60% basal and tiller fertilizer ratio, all varieties had higher bending resistance and lower lodging index but individual varieties showed inter-annual differences. Compared with N1, N2 and N3 treatments had lower plant height, lower center of gravity, thicker stem wall, shorter internode, and higher internode fullness and there was no significant difference between N2 and N3 treatments. Correlation analysis showed that the key to improve lodging resistance was to reduce plant height, the height of the center of gravity, and fresh weight of single stem and to improve stem diameter and fullness of the 4th internode from the top. Comprehensively considering the lodging index and yield characters of different varieties, 6:3:1 treatment with ratio of basal and tiller fertilizer, panicle fertilizer, and grain fertilizer could better coordinate the yield characters and lodging resistance of rice to achieve the goal of high yield and lodging resistance. |
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| Keywords: | Double-cropping rice Southern Hunan Nitrogen fertilizer management Yield Lodging resistance |
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