| 施氮量对超级杂交稻Y两优900产量与氮肥利用率的影响 |
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| 引用本文： | 刘宇,曹家林,肖正午,张鸣宇,陈佳娜,曹放波,黄敏.施氮量对超级杂交稻Y两优900产量与氮肥利用率的影响[J].作物杂志,2023,39(2):126-14. |
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| 作者姓名： | 刘宇 曹家林 肖正午 张鸣宇 陈佳娜 曹放波 黄敏 |
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| 作者单位： | 湖南农业大学农学院/作物生理与分子生物学教育部重点实验室，410128，湖南长沙 |
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| 基金项目： | 国家重点研发计划课题(2016YFD0300509) |
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| 摘 要： | 为探明施氮量对超级杂交稻Y两优900产量形成与氮肥利用的影响，于2020-2021年在湖南省浏阳市开展大田试验，研究不同施氮量(N0:0kg/hm2;N1:120kg/hm2;N2:180kg/hm2;N3:240kg/hm2)处理下Y两优900的产量以及氮肥利用率差异。结果表明，Y两优900在N2处理下2年产量分别为8.77和8.82t/hm2，高于N0和N1处理，与N3处理差异不显著。穗数和穗粒数在各施肥处理间无显著差异，结实率在N2处理下高于其他2个处理，千粒重有随着施氮量增加而增加的趋势。N2处理的总干物质积累量低于N3处理，但其收获指数高于N3处理。随施氮量的增加，各处理氮肥农学利用率和氮肥偏生产力逐渐降低。N2处理的氮肥籽粒生产效率和氮收获指数均高于N3处理。由此可见，在本试验条件(中产区)下，180kg/hm2施氮量有利于在保证超级杂交稻Y两优900高产的同时，实现较高的氮肥利用率。
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| 关 键 词： | 施氮量 超级杂交稻 产量 氮肥利用率 |
| 收稿时间： | 2021-12-08 |
Effects of Nitrogen Application Rates on Yield and Nitrogen Use Efficiency of Super Hybrid Rice Y-liangyou 900 |
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| Liu Yu,Cao Jialin,Xiao Zhengwu,Zhang Mingyu,Chen Jia’na,Cao Fangbo,Huang Min.Effects of Nitrogen Application Rates on Yield and Nitrogen Use Efficiency of Super Hybrid Rice Y-liangyou 900[J].Crops,2023,39(2):126-14. |
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| Authors: | Liu Yu Cao Jialin Xiao Zhengwu Zhang Mingyu Chen Jia’na Cao Fangbo Huang Min |
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| Institution: | College of Agronomy, Hunan Agricultural University/Key Laboratory of Crop Physiology and Molecular Biology of Ministry of Education, Changsha 410128, Hunan, China |
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| Abstract: | In order to explore yield formation characteristics and nitrogen use efficiency of super hybird rice Y-liangyou 900 differing in nitrogen fertilizer treatments, field experiment were conducted in Liuyang, Hunan with four nitrogen application treatments, N0 (0kg/ha), N1 (120kg/ha), N2 (180kg/ha), N3 (240kg/ha) in 2020-2021. The results showed that the two-year yields were 8.77 and 8.82t/ha, respectively of Y-liangyou 900 in the N2 treatment, and were higher than that in the N0 and N1 treatments, and was not significantly different from the N3 treatment. There was no significant difference between effective panicles and spikelets per panicle between the fertilization treatments. Seed-setting rate under the N2 treatment was higher than that of the other two fertilization treatments, and the 1000-grain weight had a increasing tendency with the increase of nitrogen application. The total dry matter accumulation of N2 treatment was lower than that of N3 treatment, but its harvest index was higher than that of N3 treatment. With the increase of nitrogen application rate, nitrogen agronomic efficiency and nitrogen partial factor productivity of each treatment gradually decreased. N use efficiency for grain production and N harvest index of N2 treatment were higher than those of N3 treatment. Thus, under the conditions of this trial, nitrogen application rate of 180kg/ha was beneficial to ensure the high yield of super hybrid rice Y-liangyou 900 while achieving high nitrogen use efficiency. |
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| Keywords: | Nitrogen application rate Super hybrid rice Yield Nitrogen use efficiency |
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