| 引用本文: | 田永雷,王静,慕宗杰,等.氮素添加对饲用燕麦光合荧光特性的影响[J].灌溉排水学报,,():-. |
| TIAN Yong-lei,WANG Jing,MU Zong-jie,et al.氮素添加对饲用燕麦光合荧光特性的影响[J].灌溉排水学报,,():-. |
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| 氮素添加对饲用燕麦光合荧光特性的影响 |
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田永雷1, 王静1, 慕宗杰2, 赵月平3, 常青4, 白春利1
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1.内蒙古自治区农牧业科学院草原研究所;2.内蒙古自治区农牧业科学院农牧业经济与信息研究所;3.乌兰察布市林业和草原局;4.苏尼特右旗朱日和镇综合保障和技术推广中心
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| 摘要: |
| 【目的】探究饲用燕麦光合荧光参数在不同氮素水平下的变化规律,明确施氮肥对饲用燕麦光合能力的影响机制,提出适宜施氮量。【方法】本研究在内蒙古阴山北麓地区,以饲用燕麦为材料,设置了0、150、200、250、300、350 kg/hm2 6个氮素水平,于孕穗期、抽穗期、灌浆期进行测定,分析光化学猝灭系数(Photochemical quenching coefficient, qP)、非光化学猝灭系数(Non-photochemical quenching coefficient, NPQ)、光系统Ⅱ实际光化学效率(Actual photochemical quantum yield, Y(Ⅱ))、光系统Ⅱ实际光化学效率(Maximal photochemical efficiency, Fv/Fm)在不同氮素水平下的变化规律。【结果】随着氮素量的增加,饲用燕麦光合荧光参数Y(Ⅱ)值、Fv/Fm值和qP值均呈现先增加后降低的变化规律；NPQ值呈现先降低后增加的趋势,N250处理时的NPQ值显著低于其它处理(P＜0.05)。随着生育期的延后,Y(Ⅱ)值和Fv/Fm值无明显变化,qP值和NPQ值则逐渐增加。【结论】适量增加氮素量有助于维持饲用燕麦PSⅡ反应中心系统的稳定性和提高光合能力。所以在阴山北麓地区种植饲用燕麦,适宜的氮肥用量为250 kg/hm2。 |
| 关键词: 饲用燕麦,氮素,光合荧光特性 |
| DOI： |
| 分类号:S153；S154.3 |
| 基金项目:内蒙古农牧业青年创新2021QNJJM05；内蒙古农牧业创新2020CXJJM10 |
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| Effect of Nitrogen Addition on Photosynthetic Fluorescence Characteristics of Forage Oats |
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TIAN Yong-lei1, WANG Jing1, MU Zong-jie2, ZHAO Yue-ping3, CHANG Qing4, BAI Chun-li1
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1.Grassland Research Institute,Academy of agriculture and animal husbandry Sciences,Inner Mongolia;2.Institute of agriculture, animal husbandry economy and information, Academy of agriculture and animal husbandry Sciences;3.Ulanqab Forestry and Grassland Bureau;4.Comprehensive Support and Technology Promotion Center of Zhurihe Town, Sunit Right Banner
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| Abstract: |
| 【Objective】 To investigate the changes of photosynthetic fluorescence parameters of forage oats under different nitrogen levels, to clarify the mechanism of the effect of nitrogen fertilization on the photosynthetic capacity of forage oats, and to propose the appropriate amount of nitrogen application. 【Method】 In this study, six nitrogen levels of 0, 150, 200, 250, 300 and 350 kg/hm2 were measured at the gestation, tasseling and filling stages in the northern foothills of the Yinshan Mountains in Inner Mongolia, using forage oats as the material. The variation patterns of Actual photochemical quantum yield (Y(II)) and Maximal photochemical efficiency (Fv/Fm) at different nitrogen levels. 【Results】 With the increase of nitrogen, the photosynthetic fluorescence parameters Y(II), Fv/Fm and qP values of forage oats showed a pattern of increasing and then decreasing; NPQ values showed a trend of decreasing and then increasing, and NPQ values at N250 treatment were significantly lower than those of other treatments (P < 0.05). With the delay of fertility, Y(II) and Fv/Fm values did not change significantly, while qP and NPQ values increased gradually. 【Conclusion】 The moderate increase of nitrogen amount helps to maintain the stability of PSII reaction center system and improve photosynthetic capacity of forage oats. Therefore, the appropriate amount of nitrogen fertilizer for growing forage oats in the northern foothills of the Yin Mountains is 250 kg/hm2. |
| Key words: Forage;oats, nitrogen, photosynthetic;fluorescence properties |
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