| 丁怡人,李冬梅,马露露,哈发都曼,马金鑫,高俊峰,吕新,张泽.滴灌棉花叶绿素荧光参数与棉花生长指标反演模型研究[J].干旱地区农业研究,2020,38(6):234~242 |
| 滴灌棉花叶绿素荧光参数与棉花生长指标反演模型研究 |
| 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 |
| 中文关键词: 滴灌 棉花 叶绿素荧光参数 叶面积指数 地上部生物量 反演模型 |
| 英文关键词:drip irrigation cotton chlorophyll fluorescence parameters leaf area index aboveground biomass inversion model |
| 基金项目:中国博士后科学基金面上项目(2017M623282);石河子大学创新发展专项（CXFZ201903） |
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| 中文摘要: |
| 以新陆早58号为试验材料，分析顶二叶荧光参数与叶绿素含量、植株群体叶面积指数及地上部生物量随生育进程和不同施氮量的变化规律，确定荧光参数与生长指标的关系，构建出基于叶绿素荧光参数的滴灌棉花生长指标反演模型。结果表明：棉花顶二叶叶绿素荧光参数Fv/F0、Fv/Fm、F0、Fm随棉花生育进程的推进逐渐降低；植株群体叶面积指数、地上部生物量与顶二叶荧光参数F0、Fm、Fs、F0′、Fm′呈极显著相关，相关系数在0.84以上；叶绿素含量与荧光参数Fv/Fm、Fv′/Fm′相关性较好，相关系数在0.710~0.877之间，模型的决定系数均在0.5以上；类胡萝卜素含量与Fv′的相关性最好，相关系数为0.892。在构建的叶绿素荧光参数与棉花生长指标的反演模型中，荧光参数Fm与植株地上部生物量的模型（y=186.17e-0.001x）精度最好，决定系数达0.907。利用荧光参数构建的模型可对滴灌棉花顶二叶叶绿素含量、群体叶面积指数及地上部生物量进行估测。 |
| 英文摘要: |
| 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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