Deriving the Leaf Area Index of Silage Maize Using Digital Hemispherical Photography Method (Case Study: Qaleh-Now Farms, South of Tehran)

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Akbari Elahe; DARVISHI BOLOORANI ALI; NEYSANI SAMANY NAJMEH; HAMZEH SAEID; SOUFIZADEH SAEID; PIGNATTI STEFANO

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Journal: Iranian Journal of Soil and Water Research Year:2020 | Volume:51 | Issue:6 Page(s): 1331-1340

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Title

Deriving the Leaf Area Index of Silage Maize Using Digital Hemispherical Photography Method (Case Study: Qaleh-Now Farms, South of Tehran)

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Keywords

Leaf Area IndexQ2

Digital Hemispherical PhotographyQ1

Extinction CoefficientQ1

Silage MaizeQ2

Abstract

The present study aimed to evaluate the efficiency of Digital Hemispherical Photography (DHP) in deriving LAI in Silage Maize farms in the south of Tehran. For this purpose, the DHP as well as destructive measurements for comparison were used to estimate LAI in Silage Maize farms in Qaleh-Now County in the south of Tehran in 2018 considering the nature of spatio-temporal variability in agricultural fields during a growing season. The results showed LAI obtained through DHP at different periods of plant growth has a strong linear correlation with the values measured by the destructive method (R2 = 0. 92, RMSE = 0. 45 and Bias = 0. 31). However, the intermediate LAI range (LAI: 2-<5) with RMSE=0. 63 and Bias = 0. 49 is less accurate than the LAI<2 range (RMSE = 0. 36, Bias = 0. 24) and LAI≥ 5 range (RMSE = 0. 41, Bias = 0. 28). The Extinction Coefficient is a parameter required for the implementation of agricultural models that in most studies, its value is assumed through similar researches. But in this study, the Extinction Coefficient which is required to calculate LAI by DHP, was calculated to be K=0. 51.

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APA: Copy

Akbari, Elahe, DARVISHI BOLOORANI, ALI, NEYSANI SAMANY, NAJMEH, HAMZEH, SAEID, SOUFIZADEH, SAEID, & PIGNATTI, STEFANO. (2020). Deriving the Leaf Area Index of Silage Maize Using Digital Hemispherical Photography Method (Case Study: Qaleh-Now Farms, South of Tehran). IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 51(6 ), 1331-1340. SID. https://sid.ir/paper/372170/en

Vancouver: Copy

Akbari Elahe, DARVISHI BOLOORANI ALI, NEYSANI SAMANY NAJMEH, HAMZEH SAEID, SOUFIZADEH SAEID, PIGNATTI STEFANO. Deriving the Leaf Area Index of Silage Maize Using Digital Hemispherical Photography Method (Case Study: Qaleh-Now Farms, South of Tehran). IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2020;51(6 ):1331-1340. Available from: https://sid.ir/paper/372170/en

IEEE: Copy

Elahe Akbari, ALI DARVISHI BOLOORANI, NAJMEH NEYSANI SAMANY, SAEID HAMZEH, SAEID SOUFIZADEH, and STEFANO PIGNATTI, “Deriving the Leaf Area Index of Silage Maize Using Digital Hemispherical Photography Method (Case Study: Qaleh-Now Farms, South of Tehran),” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 51, no. 6 , pp. 1331–1340, 2020, [Online]. Available: https://sid.ir/paper/372170/en

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