| 施氮量和播种量对燕麦光合特性、激素含量及种子产量的影响 |
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| 引用本文： | 贾志锋,马祥,琚泽亮,刘凯强,赵桂琴.施氮量和播种量对燕麦光合特性、激素含量及种子产量的影响[J].草地学报,2021,29(2):293-302. |
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| 作者姓名： | 贾志锋 马祥 琚泽亮 刘凯强 赵桂琴 |
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| 作者单位： | 1. 甘肃农业大学草业学院, 甘肃 兰州 730070;2. 青海大学畜牧兽医科学院, 青海省青藏高原优良牧草种质资源利用重点实验室, 青海 西宁 810016 |
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| 基金项目： | 国家燕麦荞麦产业体系;青海省科技厅重点实验室发展专项 |
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| 摘 要： | 为探究不同施氮量和播种量对燕麦（Avena sativa L.）光合特性、激素含量及种子产量的影响，本研究以‘青燕1号’燕麦为材料，采用随机区组设计，设置60，180和300 kg·hm-2共3个播种量，每个播种量设0，45，90，135和180 kg·hm-2共5个施氮量，研究施氮量和播种量对燕麦旗叶光合特性、衰老相关激素含量和种子产量的影响。结果表明，施氮量、播种量及其交互作用对燕麦旗叶光合特性、衰老相关激素含量和种子产量有显著影响（P<0.001）。种子产量随施氮量和播种量的增加先增加后降低，90 kg·hm-2施氮量、180 kg·hm-2播种量时种子产量最高（P<0.05），达3 654 kg·hm-2。旗叶的光合效率随施氮量和播种量的增加呈先升高后降低的趋势，燕麦种子产量与旗叶光合特性极显著相关（P<0.01）。综上所述，90 kg·hm-2施氮量和180 kg·hm-2播种量是湟中及周边地区种植燕麦的适宜栽培措施。
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| 关 键 词： | 燕麦 种子产量 激素含量 施氮量 播种量 |
| 收稿时间： | 2020-09-23 |
Effects of Nitrogen Application Rate and Sowing Rate on Photosynthetic Characteristics,Phytohormone Content and Grain Yield of Oat |
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| JIA Zhi-feng,MA Xiang,JU Ze-liang,LIU Kai-qiang,ZHAO Gui-qin.Effects of Nitrogen Application Rate and Sowing Rate on Photosynthetic Characteristics,Phytohormone Content and Grain Yield of Oat[J].Acta Agrestia Sinica,2021,29(2):293-302. |
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| Authors: | JIA Zhi-feng MA Xiang JU Ze-liang LIU Kai-qiang ZHAO Gui-qin |
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| Institution: | 1. College of Pratacultural Science, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;2. Key Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau, Academy of Animal Husbandry and Veterinary Sciences, Qinghai University, Xining, Qinghai Province 810016, China |
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| Abstract: | To explore the effects of different nitrogen application rates and sowing rates on the photosynthetic characteristics,phytohormone content and grain yield of oat,‘Qingyan No. 1’ was selected as material in this study. A random block design was conducted with three different sowing rates:60 (D1),180 (D2),and 300 kg·hm-2 (D3). For each sowing rate,five different nitrogen application rates,0 (N0),45 (N1),90 (N2),135 (N3) and 180 kg·hm-2(N4) were designated. The effects of nitrogen application rate and sowing rate on oat flag leaf photosynthetic characteristics,senescence-related phytohormone content and grain yield were studied. The results showed that nitrogen application rate,sowing rate and their interaction had significant (P<0.001) impacts on oat flag leaf photosynthetic characteristics,senescence-related phytohormone content and grain yield. Seed yield first increased and then decreased with the increase of nitrogen application rate and sowing rate,the maximum (P<0.05) yield (3 654 kg·hm-2) was found when the nitrogen application rate was 90 kg·hm-2 and the sowing rate was 180 kg·hm-2. The flag leaf photosynthetic efficiency increased and then decreased with the increase of nitrogen application rate and sowing rate. The seed yield of oat was significantly (P<0.01) correlated with the flag leaf photosynthetic characteristics. In summary,the combination of nitrogen fertilization of 90 kg·hm-2 and sowing rate of 180 kg·hm-2 is suitable for oat planting in Huangzhong and surrounding districts. |
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| Keywords: | Oat Seed yield Phytohormone content Nitrogen application rate Sowing rate |
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