An optimized strategy of nitrogen-split application based on the leaf positional differences in chlorophyll meter readings

Wu, Guanwei; CHEN, Xing-yu; ZANG, Yu-guang; Ye, Ying; Qian, Xiaoqing; ZHANG, Wei-yang; Zhang, Hao; LIU, Li-jun; Zhang, Zujian; WANG, Zhi-qin; Gu, Junfei

doi:10.1016/j.jia.2023.07.014

Cited by 6 publications

(3 citation statements)

References 47 publications

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“…A threshold SPAD value can guide N management for crops [60]. The practice of using threshold SPAD values in nutritional diagnosis has been widely reported in rice [61][62][63], maize [60,64], wheat [65], potato [66,67], cassava [68], pumpkins [69], tomato [70], strawberries [71], and other crops such as Zizania, soybean, peanut, and cotton [72]. However, there are relatively few reports on tree species.…”

Section: Characteristics Of Spad Chlorophyll and Carotenoid Concentra...mentioning

confidence: 99%

Can SPAD Values and CIE Lab* Scales Predict Chlorophyll and Carotenoid Concentrations in Leaves and Diagnose the Growth Potential of Trees? An Empirical Study of Four Tree Species

Wei,

Lu,

Shang

et al. 2024

Horticulturae

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Photosynthetic pigments are fundamental for plant photosynthesis and play an important role in plant growth. Currently, the frequently used method for measuring photosynthetic pigments is spectrophotometry. Additionally, the SPAD-502 chlorophyll meter, with its advantages of easy operation and non-destructive testing, has been widely applied in land agriculture. However, the application prospects of its test results in horticultural plants have not yet been proven. This study examines the reliability of SPAD values for predicting chlorophyll concentrations. Using fresh and senescent leaves from four common horticultural plants, we measured SPAD values, photosynthetic pigment concentrations, and leaf color parameters. A generalized linear mixed model demonstrated that SPAD values are a reliable indicator for predicting chlorophyll concentrations, yet interspecific variations exist. Based on the predictive power of SPAD values for chlorophyll, we first propose an Enrichment Index (CEI) and a Normal Chlorophyll Concentration Threshold (NCCT). The CEI can be used to compare SPAD values among different species, and the NCCT value can serve as a more accurate indicator for assessing the growth potential of old trees. However, due to a limited sample size, further research with larger samples is needed to refine the diagnosis of plant growth potential and enhance the management of ornamental plant cultivation.

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Section: Characteristics Of Spad Chlorophyll and Carotenoid Concentra...mentioning

confidence: 99%

Can SPAD Values and CIE Lab* Scales Predict Chlorophyll and Carotenoid Concentrations in Leaves and Diagnose the Growth Potential of Trees? An Empirical Study of Four Tree Species

Wei,

Lu,

Shang

et al. 2024

Horticulturae

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“…For example, in site-specific nutrient management (SSNM), the topdressing N rate is adjusted either upward or downward based on the SPAD threshold values [32]. However, SPAD value varies with genotypes, environmental factors, and leaf characteristics [33,34]. An optimized strategy of nitrogen-split application based on relative SPAD value (RSPAD) due to the leaf positional differences in chlorophyll meter readings was developed and significantly improved NUE [34].…”

Section: The Approaches To Increase Nuementioning

confidence: 99%

“…However, SPAD value varies with genotypes, environmental factors, and leaf characteristics [33,34]. An optimized strategy of nitrogen-split application based on relative SPAD value (RSPAD) due to the leaf positional differences in chlorophyll meter readings was developed and significantly improved NUE [34].…”

Section: The Approaches To Increase Nuementioning

confidence: 99%

Optimizing Irrigation and Nitrogen Regimes in Rice Plants Can Contribute to Achieving Sustainable Rice Productivity

2023

Agronomy

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Isolating Water and Nitrogen Stress Tolerant Genotypes Among Tomato Landraces and Solanum pennellii Backcross Inbred Lines

Cirillo,

Ruggiero,

Caullireau

et al. 2024

J Plant Growth Regul

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An optimized strategy of nitrogen-split application based on the leaf positional differences in chlorophyll meter readings

Cited by 6 publications

References 47 publications

Can SPAD Values and CIE Lab* Scales Predict Chlorophyll and Carotenoid Concentrations in Leaves and Diagnose the Growth Potential of Trees? An Empirical Study of Four Tree Species

Can SPAD Values and CIE Lab* Scales Predict Chlorophyll and Carotenoid Concentrations in Leaves and Diagnose the Growth Potential of Trees? An Empirical Study of Four Tree Species

Optimizing Irrigation and Nitrogen Regimes in Rice Plants Can Contribute to Achieving Sustainable Rice Productivity

Isolating Water and Nitrogen Stress Tolerant Genotypes Among Tomato Landraces and Solanum pennellii Backcross Inbred Lines

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An optimized strategy of nitrogen-split application based on the leaf positional differences in chlorophyll meter readings

Cited by 6 publications

References 47 publications

Can SPAD Values and CIE L*a*b* Scales Predict Chlorophyll and Carotenoid Concentrations in Leaves and Diagnose the Growth Potential of Trees? An Empirical Study of Four Tree Species

Can SPAD Values and CIE L*a*b* Scales Predict Chlorophyll and Carotenoid Concentrations in Leaves and Diagnose the Growth Potential of Trees? An Empirical Study of Four Tree Species

Optimizing Irrigation and Nitrogen Regimes in Rice Plants Can Contribute to Achieving Sustainable Rice Productivity

Isolating Water and Nitrogen Stress Tolerant Genotypes Among Tomato Landraces and Solanum pennellii Backcross Inbred Lines

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Product

Resources

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Can SPAD Values and CIE Lab* Scales Predict Chlorophyll and Carotenoid Concentrations in Leaves and Diagnose the Growth Potential of Trees? An Empirical Study of Four Tree Species

Can SPAD Values and CIE Lab* Scales Predict Chlorophyll and Carotenoid Concentrations in Leaves and Diagnose the Growth Potential of Trees? An Empirical Study of Four Tree Species