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Upgrading Maize Cultivation in Bosnia and Herzegovina from Rainfed to Irrigated Systems: Use of Remote Sensing Data and the Dual Crop Coefficient Approach to Estimate Evapotranspiration
Publication . Cadro, Sabrija; Omerovic, Zuhdija; Soares, Daniela; Crljenkovic, Benjamin; Almeida, Wilk S.; Šipka, Milan; Makaš, Merima; Todorovic, Mladen; Paço, Teresa A.
A two-year experiment was conducted with a local maize hybrid under full (F) and deficit
(D) drip irrigation and rainfed conditions (R) to estimate maize evapotranspiration in Bosnia and
Herzegovina (BiH). Three approaches, namely, A&P, SIMDualKc (SD), and vegetation index (VI), to
estimate the actual crop coefficient (Kc act), the actual basal crop coefficient (Kcb act), and the actual
crop evapotranspiration (ETc act), were applied with the dual crop coefficient method and remote
sensing (RS) data for the first time. While Kcb act from all approaches matched FAO56 tabulated
values, SD showed differences in comparison to A&P of up to 0.24 in D and R conditions, especially
in the initial and mid-season stages. VI demonstrated very good performance in all treatments. In F,
the obtained Kc act for all approaches during the initial and end stages were higher than the tabulated
values, ranging from 0.71 to 0.87 for the Kc ini act and from 0.80 to 1.06 for the Kc end act, while the mid-
season period showed very good agreement with the literature. The maize crop evapotranspiration
range is 769–813 mm, 480–752 mm, and 332–618 mm for F, D, and R, respectively. The results
confirmed the suitability of both approaches (SD and VI) to estimate maize crop evapotranspiration
under F, with the VI approach demonstrating an advantage in calculating Kcb act, Kc act, and ETc act
values under water stress conditions. The higher observed yields (67.6%) under irrigation conditions
emphasize the need to transition from rainfed to irrigation-dependent agriculture in BiH, even for
drought-resistant crops like maize.
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Fundação para a Ciência e a Tecnologia
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OE
Número da atribuição
2022.10607.BD