Efekat navodnjavanja na prinos, produktivnost utrošene vode i indeks lisne površine kukuruza | Effect of irrigation on yield, water productivity and leaf area index of maize
2020
Pejić, Borivoj | Mačkić, Ksenija | Simić, Dejan | Bajić, Ivana | Sikora, Vladimir | Bekavac, Goran | Kresović, Branka
The experiment with irrigated maize was conducted at Bački Petrovac experimental field (N 45°19`, E 19°50`) of Institute of Field and Vegetable Crops in Novi Sad on the calcareous chernozem soil on the loess terrace in 2019. Maize hybrid NS 3023 (FAO 390) was used for the trials. The plants were drip irrigated with a lateral row per plant row with drippers spaced every 0.33 m. The drippers had an average flow of 2.0 l h-1 under a pressure of 100 kPa. The trial also included the non-irrigated (rainfed) control variant.Irrigation was scheduled on the basis of water balance method using reference evapotranspiration (ETo) and crop coefficients (kc). ETo was calculated by Hargreaves equation. Daily evapotranspiration (ETd) was computed using ETo and kc of 0.3-0.5, 0.7-0.85, 1.05-1.2, 0.8-0.9, and 0.5-0.6 for April-May, June, July August and September respectively. Leaf area index (LAI) was determined by multiplying the leaf length by the leaf width by a shape factor for maize 0.75. Irrigation water use (IWUE) was calculated from the ratio of maize yield in conditions with (Ym) and without irrigation (Ya) and irrigation water applied (I).The aim of the study was to determine the effect of drip irrigation on yield, water use efficiency and maize leaf area index.Irrigation significantly affected maize yield; yield of irrigated maize was 10894 kg ha-1 , and of nonirrigated 7276 kg ha-1 .The affect of irrigation on the leaf area index (LAI) was also significantand amounted to 4.07 m2 m-2 on irrigated variant and to 3.49 m2 m-2 on nonirrigated variant. Maize IWUE value of 2.41 kg m-3 was determined.
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书目信息
出版者 Poljoprivredni fakultet, Novi Sad (Srbija) | Faculty of Agriculture, Novi Sad (Serbia)
ISSN 0546-8264