Effects of Nitrogen Application Rate and Sowing Rate on Photosynthetic Characteristics,Phytohormone Content and Grain Yield of Oat

doi:10.11733/j.issn.1007-0435.2021.02.010

Acta Agrestia Sinica ›› 2021, Vol. 29 ›› Issue (2): 293-302.DOI: 10.11733/j.issn.1007-0435.2021.02.010

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Effects of Nitrogen Application Rate and Sowing Rate on Photosynthetic Characteristics,Phytohormone Content and Grain Yield of Oat

JIA Zhi-feng^1,2, MA Xiang², JU Ze-liang², LIU Kai-qiang², ZHAO Gui-qin¹

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

Received:2020-09-23 Revised:2020-10-20 Online:2021-02-15 Published:2021-02-25

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

贾志锋^1,2, 马祥², 琚泽亮², 刘凯强², 赵桂琴¹

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

通讯作者: 赵桂琴
作者简介:贾志锋(1978-),男,甘肃金昌人,副研究员,博士研究生,主要从事牧草栽培育种研究,E-mail:jzhfeng@163.com
基金资助:
青海省科技厅重点实验室发展专项（2020-ZJ-Y03），国家燕麦荞麦产业体系（CARS-07）资助

Abstract

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.

Key words: Oat, Seed yield, Phytohormone content, Nitrogen application rate, Sowing rate

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。

关键词: 燕麦, 种子产量, 激素含量, 施氮量, 播种量

CLC Number:

S482.4

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.

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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Effects of Nitrogen Application Rate and Sowing Rate on Photosynthetic Characteristics,Phytohormone Content and Grain Yield of Oat

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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