| Study on inversion model of cotton chlorophyll fluorescence parameters and cotton growth index under drip irrigation |
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| DOI：10.7606/j.issn.1000-7601.2020.06.31 |
| Key Words: drip irrigation cotton chlorophyll fluorescence parameters leaf area index aboveground biomass inversion model |
| Author Name | Affiliation | | DING Yiren | Agricultural College of Shihezi University/Key Laboratory of Oasis Ecological Agriculture of Xinjiang Production and Construction Corps, Shihezi, Xinjiang 832000, China | | LI Dongmei | Agricultural College of Shihezi University/Key Laboratory of Oasis Ecological Agriculture of Xinjiang Production and Construction Corps, Shihezi, Xinjiang 832000, China | | MA Lulu | Agricultural College of Shihezi University/Key Laboratory of Oasis Ecological Agriculture of Xinjiang Production and Construction Corps, Shihezi, Xinjiang 832000, China | | HA Faduman | Agricultural College of Shihezi University/Key Laboratory of Oasis Ecological Agriculture of Xinjiang Production and Construction Corps, Shihezi, Xinjiang 832000, China | | MA Jinxin | Agricultural College of Shihezi University/Key Laboratory of Oasis Ecological Agriculture of Xinjiang Production and Construction Corps, Shihezi, Xinjiang 832000, China | | GAO Junfeng | Agricultural College of Shihezi University/Key Laboratory of Oasis Ecological Agriculture of Xinjiang Production and Construction Corps, Shihezi, Xinjiang 832000, China | | LV Xin | Agricultural College of Shihezi University/Key Laboratory of Oasis Ecological Agriculture of Xinjiang Production and Construction Corps, Shihezi, Xinjiang 832000, China | | ZHANG Ze | Agricultural College of Shihezi University/Key Laboratory of Oasis Ecological Agriculture of Xinjiang Production and Construction Corps, Shihezi, Xinjiang 832000, China |
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| Abstract: |
| Using Xinluzao 58 as experimental material, the relationship between fluorescence parameters and chlorophyll content in the top 2-leaves, leaf area index of plant population, and aboveground biomass with growth process and different nitrogen (N) application rates was analyzed, and the relationship between fluorescence parameters and growth indexes was determined. In addition, the inversion model of cotton growth indexes under drip irrigation based on chlorophyll fluorescence parameters was established. The chlorophyll fluorescence parameters Fv/F0, Fv/Fm, F0, and Fm of cotton top 2-leaves decreased gradually with the progress of cotton growth process, and the difference between different N treatments was not significant. The leaf area index and aboveground biomass of the plant population were significantly correlated with the top 2-leaves fluorescence parameters F0, Fm, Fs, F0′, Fm′, and the correlation coefficient was above 0.84. The correlation of chlorophyll content and fluorescence parameters, Fv/F0 and Fv/Fm, was good, and the correlation between carotenoid content and Fv′ was the best with the correlation coefficient of 0.892. In the inversion model of chlorophyll fluorescence parameters and cotton growth indicators, the fluorescence parameter Fm and the plant aboveground biomass model (y=186.17e-0.001x) had the best accuracy, with a coefficient of determination of 0.907. The model constructed by fluorescence parameters could be used to estimate the chlorophyll content, population leaf area index, and aboveground biomass of the top 2-leaves of drip irrigation cotton. |
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