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- Title
氮素用量对设施韭菜气体交换及叶绿素荧光参数的影响.
- Authors
宋羽; 曲继松; 张丽娟; 朱倩楠
- 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.
- Publication
Xinjiang Agricultural Sciences, 2020, Vol 57, Issue 5, p852
- ISSN
1001-4330
- Publication type
Article
- DOI
10.6048/j.issn.1001-4330.2020.05.008