Radiation‐use efficiency for forage kale crops grown under different nitrogen application rates

Chakwizira, E.; Brown, Hamish E.; Ruiter, J. M. de

doi:10.1111/gfs.12150

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…In general, the radiation use efficiency is obtained as the slope of the regression line for biomass accumulated with PAR light intercepted by a plant ( Chakwizira et al, 2014 ). Accordingly, the slope of the regression line of the accumulated TPC or TFC content with absorbed UV energy can be regarded as UV energy yield ( Figures 6 , 7 ).…”

Section: Discussionmentioning

confidence: 99%

Quantitative Analysis of UV-B Radiation Interception and Bioactive Compound Contents in Kale by Leaf Position According to Growth Progress

Yoon

Kim

et al. 2021

Front. Plant Sci.

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UV-B (280–315 nm) radiation has been used as an effective tool to improve bioactive compound contents in controlled environments, such as plant factories. However, plant structure changes with growth progress induce different positional distributions of UV-B radiation interception, which cause difficulty in accurately evaluating the effects of UV-B on biosynthesis of bioactive compounds. The objective of this study was to quantitatively analyze the positional distributions of UV-B radiation interception and bioactive compound contents of kales (Brassica oleracea L. var. acephala) with growth progress and their relationships. Short-term moderate UV-B levels did not affect the plant growth and photosynthetic parameters. Spatial UV-B radiation interception was analyzed quantitatively by using 3D-scanned plant models and ray-tracing simulations. As growth progressed, the differences in absorbed UV-B energy between leaf positions were more pronounced. The concentrations of total phenolic compound (TPC) and total flavonoid compound (TFC) were higher with more cumulative absorbed UV-B energy. The cumulative UV energy yields for TFC were highest for the upper leaves of the older plants, while those for TPC were highest in the middle leaves of the younger plants. Despite the same UV-B levels, the UV-B radiation interception and UV-B susceptibility in the plants varied with leaf position and growth stage, which induced the different biosynthesis of TFC and TPC. This attempt to quantify the relationship between UV-B radiation interception and bioactive compound contents will contribute to the estimation and production of bioactive compounds in plant factories.

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Section: Discussionmentioning

confidence: 99%

Quantitative Analysis of UV-B Radiation Interception and Bioactive Compound Contents in Kale by Leaf Position According to Growth Progress

Yoon

Kim

et al. 2021

Front. Plant Sci.

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“…The N in soil and crop plant are important elements in uencing photosynthesis in agricultural production, and the change of nitrogen application rate and period and N topdressing ratio usually lead to the increase or decrease of N in soil and plant. The method of nitrogen application can affect the growth and development, yield and harvest index of crops mainly because the existing state of N in soil and plant has a very close relationship with the leaf area index (LAI), chlorophyll content, photosynthetic rates, radiation interception and radiation-use e ciency of crop (Parry et al 2011;Chakwizira et al 2014; Lemaire et al 2008). Studies have shown that intercellular CO 2 concentration, stomatal conductance, chlorophyll content, leaf area, photosynthetically active radiation (PAR) and net photosynthetic rates were decreased or increased with the change of nitrogen application rate and N topdressing ratio (Shangguan et al 2000;Yang et al 2018;Li et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Response of Canopy Photosynthesis, Grain Quality and Harvest Index of Wheat to Different Nitrogen Application Methods

Zhang

et al. 2022

Preprint

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To fully explore the effects of N on enhancing photosynthesis, grain quality and yield of wheat, experiments with four nitrogen levels 0 (N0), 120 (N1), 180 (N2) and 240 (N3) kg N ha− 1 and four ratios of basal to topdressing R0 (0:0), R1 (7:3), R2 (6:4) and R3 (5:5) were conducted. The effect of N topdressing ratio on improving leaf area of photosynthetic efficiency was insignificant under the same N level. The effect of N fertilization level on increasing chlorophyll content was more significant than that of N topdressing ratio. Within the same N level, the canopy photosynthetically active radiation in R2 was higher than that in R1 and R3, and increasing 60 kg N ha− 1 significantly enhanced canopy photosynthetically active radiation. The effect of N topdressing ratio on photosynthetic rate, stomatal conductance and transpiration rate were consistently R2 > R3 > R1, compared to N1, N3 could significantly increase photosynthetic rate. Increasing 120 kg N ha− 1 significantly enhanced grain protein content, wet gluten and sedimentation value, while the effect of N topdressing ratio was insignificant. Increasing N application amount from 120 kg ha− 1 to 180 kg ha− 1 significantly enhanced yield, and the yields and harvest indexes in 2019, 2020 and 2021 were consistently R2 > R3 > R1. The findings suggested that the effect of increasing N application amount (60 kg ha− 1) was more obviously than that of N topdressing ratio, and R2 was more conducive to improving canopy photosynthesis, grain quality, yield and harvest index.

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“…The N in soil and crop plants is an important element influencing photosynthesis in agricultural production, and the change of nitrogen application rate and period and N topdressing ratio usually leads to the increase or decrease in N in soil and plants. The method of nitrogen application can affect the growth and development, yield, and harvest index of crops, mainly because the existing state of N in soil and plant has a very close relationship with the leaf area index (LAI), chlorophyll content, photosynthetic rates, radiation interception, and radiation-use efficiency of crops [3][4][5]. Studies have shown that intercellular CO 2 concentration, stomatal conductance, chlorophyll content, leaf area, photosynthetically active radiation (PAR), and net photosynthetic rates decreased or increased with changes in nitrogen application rate and N topdressing ratio [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Response of Canopy Photosynthesis, Grain Quality, and Harvest Index of Wheat to Different Nitrogen Application Methods

Zhang

et al. 2022

Plants

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To fully explore the effects of N on enhancing photosynthesis, grain quality, and yield of wheat (Ningmai 13), experiments with four nitrogen levels 0 (N0), 120 (N1), 180 (N2), and 240 (N3) kg N ha−1 and four ratios of basal to topdressing R0 (0:0), R1 (7:3), R2 (6:4), and R3 (5:5) were conducted. The basal N was applied to soil before sowing and the topdressing N was applied at jointing stage. The effect of N topdressing ratio on improving leaf area of photosynthetic efficiency was insignificant under the same N level. The effect of N fertilization level on increasing chlorophyll content was more significant than that of N topdressing ratio. Within the same N level, the canopy photosynthetically active radiation in R2 was higher than that in R1 and R3, and increasing N by 60 kg ha−1 significantly enhanced canopy photosynthetically active radiation. The effect of N topdressing ratio on photosynthetic rate, stomatal conductance, and transpiration rate were consistently R2 > R3 > R1; compared to N1, N3 could significantly increase photosynthetic rate. Increasing 120 kg N ha−1 significantly enhanced grain protein content, wet gluten, and sedimentation value, while the effect of N topdressing ratio was insignificant. Increasing N dose from 120 kg ha−1 to 180 kg ha−1 significantly enhanced yield, and the yields and harvest indexes in 2019, 2020, and 2021 were consistently R2 > R3 > R1. The findings suggested that the effect of increasing N dose (60 kg ha−1) was more considerable than that of N topdressing ratio, N3R2 (within the range of N application in this experiment) was more conducive to improving canopy photosynthesis, yield, and harvest index, and R3 was more conducive to increasing grain protein content, wet gluten, and sedimentation value.

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Radiation‐use efficiency for forage kale crops grown under different nitrogen application rates

Cited by 7 publications

References 32 publications

Quantitative Analysis of UV-B Radiation Interception and Bioactive Compound Contents in Kale by Leaf Position According to Growth Progress

Quantitative Analysis of UV-B Radiation Interception and Bioactive Compound Contents in Kale by Leaf Position According to Growth Progress

Response of Canopy Photosynthesis, Grain Quality and Harvest Index of Wheat to Different Nitrogen Application Methods

Response of Canopy Photosynthesis, Grain Quality, and Harvest Index of Wheat to Different Nitrogen Application Methods

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