Effects of Nitrogen Consumption on Gas Exchange and Chlorophyll Fluorescence Parameters of Chives in Facilities

doi:10.6048/j.issn.1001-4330.2020.05.008

Abstract

Abstract: 【Objective】 To study the effects of different amounts of nitrogen on the gas exchange and chlorophyll fluorescence parameters of Chinese chive in the facility.【Method】The annual Chinese chive was used as the experimental material, and eight different degrees of positions were adopted: U₁ (CK, 0), U₂ 9.2 kg/(667m²·y), U₃ 18.4 kg/(667m²·y), U₄ 27.6 kg/(667m²·y), U₅ 36.8 kg/(667m²·y), U₆ 46.0 kg/(667m²·y), U₇ 55.2 kg/(667m²·y), U₈ 64.4 kg/(667m²·y). Experiments were carried out to determine the gas exchange parameters (net photosynthetic rate, intercellular CO₂ concentration, transpiration rate, stomatal conductance), chlorophyll fluorescence kinetic parameters (steady-state fluorescence under light, electron transfer rate, excitation energy capture efficiency of PSII reaction center under light adaptation, quantum efficiency of CO₂ assimilation, non-photochemical quenching coefficient and photochemical quenching coefficient).【Results】The results showed that the kinetic parameters of gas exchange and chlorophyll fluorescence of leek leaves increased first and then decreased with the increase of nitrogen concentration. The most nitrogen application amount of photosynthetic parameters was 13.40-33.73 kg/(667m²·y), and the most nitrogen application amount of chlorophyll fluorescence parameters was 27.72-40.76 kg/(667m²·y).【Conclusion】 Therefore, when photosynthetic parameters and chlorophyll fluorescence parameters were comprehensively considered, it was recommended that the nitrogen amount for facility chives should be 27.72-33.73 kg/(667m²·y) in Ningxia region.

Key words: Chinese chives; nitrogen consumption; photosynthesis; chlorophyll fluorescence parameters

摘要： 【目的】研究不同氮素用量对设施韭菜气体交换及叶绿素荧光参数的影响。【方法】以1年生韭菜作为材料,通过U₁(CK,0)、U₂9.2 kg/(667m²·y)、U₃18.4 kg/(667m²·y)、U₄27.6 kg/(667m²·y)、U₅36.8 kg/(667m²·y)、U₆46.0 kg/(667m²·y)、U₇55.2 kg/(667m²·y)、U₈64.4 kg/(667m²·y)8个处理,测定气体交换参数(净光合速率、胞间CO₂浓度、蒸腾速率、气孔导度)、叶绿素荧光动力学参数(光下稳态荧光、电子传递速率、光适应下PSII反应中心激发能捕获效率、CO₂同化的量子效率、非光化学淬灭系数和光化学淬灭系数)。【结果】韭菜叶片气体交换及叶绿素荧光动力学参数均随着氮素浓度的增加均表现出先增加后减少的趋势,光合参数的最施氮素用量为13.40~33.73 kg/(667m²·y),叶绿素荧光参数的最施氮素用量在27.72~40.76 kg/(667m²·y)。【结论】综合光合参数与叶绿素荧光参数,宁夏地区设施韭菜氮素用量为27.72~33.73 kg/(667m²·y)(即尿素施用量为60.25~73.33 kg/(667m²·y)。

关键词: 设施韭菜, 氮素用量, 光合作用, 叶绿素荧光参数

CLC Number:

S143
S633.3

SONG Yu, QU Jisong, ZHANG Lijuan, ZHU Qiannan. Effects of Nitrogen Consumption on Gas Exchange and Chlorophyll Fluorescence Parameters of Chives in Facilities[J]. Xinjiang Agricultural Sciences, 2020, 57(5): 852-858.

宋羽, 曲继松, 张丽娟, 朱倩楠. 氮素用量对设施韭菜气体交换及叶绿素荧光参数的影响[J]. 新疆农业科学, 2020, 57(5): 852-858.

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