Dynamic responses of physiological indexes in maize leaves to different spraying fertilizers at varying concentrations

Fan, Xinrui; Zhao, Weixia; Li, Jiusheng

doi:10.1007/s00271-022-00820-z

Cited by 3 publications

(2 citation statements)

References 41 publications

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“…To ensure that tomatoes grow and develop optimally, they must have an adequate water supply [12]. However, in traditional tomato production facilities such as solar and plastic greenhouses, irrigation is mainly based on artificial experience, which often results in significant water wastage [13]. The leaf area (LA) is the primary organ responsible for transpiration in tomato growth, and the leaf area index (LAI) is the total tomato leaf area per unit of land area, which is directly related to the crop evapotranspiration (ETc) of tomatoes [14].…”

Section: Introductionmentioning

confidence: 99%

Simulation Model Construction of Plant Height and Leaf Area Index Based on the Overground Weight of Greenhouse Tomato: Device Development and Application

Guo,

Wu,

Cao

et al. 2024

Horticulturae

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Plant height and leaf area index (LAI) are crucial growth indicators that reflect the growth status of tomatoes in greenhouses, enabling accurate determinations to effectively estimate crop transpiration and formulate irrigation strategies for reducing agricultural water waste. There is a need for the increased application of related models to simulate tomato growth indices in the traditional greenhouse production in China. This study proposes a nondestructive, real-time monitoring and simulation device for measuring tomato plant height and leaf area index. The weight of aboveground tomatoes was obtained by suspending tomato plants on dynamometers, while the total weight of stem and leaf organs was determined using a distribution coefficient simulation model. The R2 value between the measurements from the electronic scale and those from the aboveground fresh weight device for tomatoes was 0.937, with an RMSE value of 0.05 kg. The monitoring device did not affect the average tomato growth during operation. The device will not affect the growth of tomatoes during monitoring. A multiple linear regression was used to compare the measured and simulated values of the plant height and leaf area index of various types of greenhouse tomatoes cultivated in different greenhouse types. The average R2 value for simulating plant height was 0.817 with an RMSE of 10.81 cm. The average R2 value for the leaf area index was 0.854, with an RMSE of 0.55 m2·m−2. The simulated values for plant height and leaf area index closely matched the measured values, indicating that the model has high accuracy and applicability in traditional Chinese greenhouses (solar greenhouses and insulated plastic greenhouses). However, further optimization is required for commercially produced, continuous plastic greenhouses equipped with greenhouse environmental control equipment.

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Section: Introductionmentioning

confidence: 99%

Simulation Model Construction of Plant Height and Leaf Area Index Based on the Overground Weight of Greenhouse Tomato: Device Development and Application

Guo,

Wu,

Cao

et al. 2024

Horticulturae

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“…On the other hand, high rainfall with uneven spatial and temporal distribution in this area easily caused nitrogen leaching loss, which consequently affected the emissions of CH 4 , CO 2 and N 2 O from the soil (Yang et al, 2022) and reduced nitrogen use efficiency and yield (Sosulski et al, 2020). To improve the summer maize yield planted in this area, Zhao, Shan, et al (2020a) demonstrated that fertilizer topdressing through sprinkler fertigation is a good method as the dual role of nutrient uptake by plant roots and leaves improved the foliar relative chlorophyll content and chlorophyll fluorescence parameters (Fan et al, 2022). This finding is consistent with others who found that sprinkler fertigation helps to delay foliar senescence and improve crop yield and fertilizer utilization efficiency (Zhao, Zhang, et al, 2020b).…”

Section: Introductionmentioning

confidence: 99%

Greenhouse gas emissions and ammonia loss of maize fertigation with a centre pivot system in the North China Plain

Fan

Zhao

2023

Irrigation and Drainage

Self Cite

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Whether sprinkler fertigation stimulates greenhouse gas emissions and ammonia loss is an indispensable consideration for nitrogen management. To assess the effect of sprinkler fertigation on N2O, CH4, CO2 and NH3 emissions, three N recommendation methods for summer maize, including the local empirical value, mineral nitrogen method and modified mineral nitrogen method, and three topdressing methods, including no topdressing, one topdressing and two topdressings following intermittent rainfall events, were tested in the 2020 and 2021 seasons. Surface irrigation with fertilizer broadcasting was used as the control treatment. The results indicated that nitrogen topdressing and rainfall promoted soil N2O, CO2 and NH3 emissions but had no obvious effect on CH4 emissions. The increasing nitrogen application rate increased gaseous nitrogen losses of N2O and NH3. Sprinkler fertigation with the modified mineral nitrogen method and two topdressings obtained the greatest yield and nitrogen use efficiency. Compared to the control treatment, the yield and nitrogen use efficiency in the sprinkler fertigation treatments was maximally increased by 20%, and the cumulative NH3 volatilization losses and gaseous nitrogen loss rate were both reduced by 16%, while the cumulative N2O emissions increased by 4%. No significant difference in global warming potential was obtained among all treatments.

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The generation processes, spatiotemporal distribution heterogeneity, and interpretation of the spatial variation mechanism of the net sprinkler water under maize canopy

Zhu

2023

Irrig Sci

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Dynamic responses of physiological indexes in maize leaves to different spraying fertilizers at varying concentrations

Cited by 3 publications

References 41 publications

Simulation Model Construction of Plant Height and Leaf Area Index Based on the Overground Weight of Greenhouse Tomato: Device Development and Application

Simulation Model Construction of Plant Height and Leaf Area Index Based on the Overground Weight of Greenhouse Tomato: Device Development and Application

Greenhouse gas emissions and ammonia loss of maize fertigation with a centre pivot system in the North China Plain

The generation processes, spatiotemporal distribution heterogeneity, and interpretation of the spatial variation mechanism of the net sprinkler water under maize canopy

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