Naslov
Seasonal phenology dynamics of alfalfa consociation with Italian ryegrass based on NDVI from Sentinel-2

Autori
Kutnjak, Hrvoje ; Žiža, Ivona ; Jantol, Nela ; Leto, Josip

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 55th Croatian and 15th Interantional Symposium on Agriculture / Boro, Mioč ; Ivan, Širić - Zagreb : Agronomski fakultet Sveučilišta u Zagrebu, 2020, 49-53

Skup
55. hrvatski i 15. međunarodni simpozij agronoma

Mjesto i datum
Vodice, Hrvatska, 16.02.2020. - 21.02.2020

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
NDVI ; Sentinel-2 ; monitoring ; phenological dynamics ; satellite imagery

Sažetak
Understanding of the specificities of phenological dynamics is essential for the reliable estimation and classification of crops by satellite imagery. This study analysed the seasonal dynamics of the normalized differential vegetation index (NDVI) of alfalfa and Italian ryegrass from the Maksimir test field at University of Zagreb Faculty of Agriculture, and explained its dynamics through utilisation and weather conditions during 2018 and 2019. Temporally and spatially, the NDVI values ranged from 0.28 to 0.82. The results showed the specificities of vegetation index dynamics caused by mowing and regeneration, with the highest values recorded in April and very strong positive correlation of NDVI to dry matter of aboveground biomass y = 13.2*x-9.2 (r = 0.951, p <0.05) suggesting the possibility of estimating the yield of alfalfa consociation with the Italian ryegrass using Sentinel 2 imagery. By connecting meteorological data and phenological dynamics of NDVI, the extent to which thermal stress can influence NDVI values and dynamics of primary production respectively is shown.

Izvorni jezik
Engleski

Znanstvena područja
Interdisciplinarne prirodne znanosti, Poljoprivreda (agronomija)

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