The development of irrigation schedules based on water balance implies a study of daily plant wat... more The development of irrigation schedules based on water balance implies a study of daily plant water requirements. A properly selected irrigation method is also of most importance. The objective of this study was to find out how surface drip irrigation (SDI) and shallow subsurface drip irrigation (SSDI), as well as different ET-based irrigation scheduling for maize (reference evapotranspiration (ETo), pan evaporation (Eo), and local climatic coefficients (lc)), affect grain yield, water use efficiency (WUE), and yield response factor (Ky) of maize. The field experiments were conducted in Vojvodina, a northern part of the Republic of Serbia, on the calcareous gleyic chernozem soil, using a complete block design in three replicates in 2019–2021. The water balance method was used for irrigation scheduling. The nonirrigated treatment was used as a control. The yield in irrigation conditions was statistically higher as compared with the nonirrigated control variant. Concerning the tested ...
Drip irrigation is gaining importance in mitigating the consequences of water scarcity even in re... more Drip irrigation is gaining importance in mitigating the consequences of water scarcity even in regions with abundant rainfall. The transition from surface to subsurface drip irrigation is accompanied by numerous problems. To overcome these issues, shallow subsurface drip irrigation can be potentially used as an effective drought control tool that brings additional benefits compared to conventional surface drip irrigation techniques. This research investigated the effects of different calculations of daily crop water requirements, reference evapotranspiration (ETo), and pan evaporation (Eo) on the yield and water use efficiency of pepper irrigated with a surface and shallow subsurface drip irrigation system. The experiment was conducted in field conditions in the Vojvodina region, the northern part of Serbia. The irrigation scheduling was based on the water balance approach. The calculated evapotranspiration rate was about 400 mm for the pepper growing period, regardless of the calcu...
Field experiment was conducted to study the effects of surface (SDI) and shallow subsurface drip ... more Field experiment was conducted to study the effects of surface (SDI) and shallow subsurface drip irrigation (SSDI) on potato (Solanum tuberosum L.) tuber yield, evapotranspiration, water use efficiency (WUE), and yield response factor (K y). The experiment was carried out under semiarid climatic conditions in the Vojvodina region in 2020. The trial was established as a block design and adapted to technical specifications of drip irrigation system. In addition, the nonirrigated, control variant was also included in the trial. Irrigation was scheduled on the basis of water balance method. Daily water used on plants evapotranspiration (ET d) was calculated by multiplying reference evapotranspiration (ET o) with crop coefficients (k c). K c values were 0.5, 0.7, 1.1, 0.9, 0.7 from planting to emergence, early vegetative development, tuber initiation, tuber enlargement and senescence, respectively. The potato processing variety 'Taurus' was used for the experiment. Obtained results indicate a significant effect of irrigation on potato yield compared to the nonirrigated variant (38.33 t ha −1) but differences in the yield using the SDI (58.06 t ha −1) and the SSDI (61.15 t ha −1) were not significant. In the study period, seasonal evapotranspiration in irrigation conditions (ET m) and in rainfed control variant (ET a) was 478 mm and 319 mm respectively. IWUE values were 9.39, 10.85 kg m-3 and 27.64, 29.09 kg m-3 but ETWUE values were 12.40, 14.35 kg m-3 and 12.14, 12.79 kg m-3 for SDI and SSDI respectively. The seasonal yield response factor (K y) of 1.03 and 1.12 for SDI and SSDI indicates that potato can be grown without irrigation in the temperate climate of Vojvodina.
The aim of this study was to determine the effect of cover crops and interactions on yield and yi... more The aim of this study was to determine the effect of cover crops and interactions on yield and yield components of maize in the semi arid conditions. Research was carried out in the production years 2020 at the Rimski Šančevi experimental station of the Institute of Field and Vegetable Crops in Novi Sad. The winter cover crops consisted of the combined intercrops: winter pea (Pisum sativum ssp. arvense L.) + triticale (Triticosecale) (PT) and single-species cover crops winter pea (P) and control without cover crops (C), all with nitrogen fertilization 50 kg ha -1 (N50) and without the use of fertilizer (N0). The sowing of winter cover crops was carried out in autumn in the first decade of November, and their mulching and plowing was done in the last week of May. After plowing and soil preparation, maize (NS4051) was sown in the first decade of Jun and harvested in October. The statistical significance (p<0.05) was found between different variants regarding the use of cover crops....
The paper aimed at identifying wheat genotypes tolerant to drought stress. The study repeated in ... more The paper aimed at identifying wheat genotypes tolerant to drought stress. The study repeated in three consecutive years was done on the alluvial soil of the Southern Morava river valley in South Serbia. The average wheat grain yield was higher by 124.5% under irrigation conditions than without irrigation. Over the experimental period, the average water consumed on wheat evapotranspiration under irrigation conditions was higher by 38.9% than without irrigation. Based on correlation statistical results and principal component analysis (PCA), in the case of stress resistant wheat genotypes, stress susceptibility index (SSI), tolerance index (TOL), mean productivity (MP), geometric mean productivity (GMP), stress tolerance index (STI), yield index (YI), yield stability index (YSI) as well as the LSD test was proved to be invariably efficient for determining the stress-tolerant genotypes. The result of tolerance index concerning drought and LSD test denoted that the Pobeda variety had a...
A three-year study was conducted to assess the effects of irrigation on the yield and evapotransp... more A three-year study was conducted to assess the effects of irrigation on the yield and evapotranspiration of soybean grown on chernozem soil. The study was made for six soybean varieties, using several irrigation alternatives (60, 70 and 80% of field water capacity), paralleled by a non-irrigated control test. In all irrigation alternatives the yields were significantly higher than in the non-irrigated control test, in the average from 29.2 to 38.1%, noting that in two first years they were from 51.8 to 64.3% higher but in third year no differences were found between the irrigated alternatives and the non-irrigated control test. Evapotranspiration ranged from 468 to 576 mm in the irrigated alternatives, and from 390 to 5l4^mm in the control test.U trogodišnjim ispitivanjima određivan je efekat navodnjavanja na prinos i evapotranspiraciju soje koja je gajena na zemljištu tipa černozem. Ispitivano je 6 genotipova soje pri različitoj predzalivnoj vlažnosti zemljišta u navodnjavanju (60,...
The study of effects ofwater stress on yield and water use by maize plants was carried out in the... more The study of effects ofwater stress on yield and water use by maize plants was carried out in the experimental field of the Maize Research Institute at Zemun Polje in the period 2006-2008. Maize sensitivity to water stress was determined using a yield response factor (Ky). The values of Ky were derived from the linear relationship between relative evapotranspiration deficits (1-ETa/ETm) and relative yield decrease (1-Ya/Ym). To assess the irrigation effect on maize yield, irrigation water use efficiency (Iwue) and evapotranspiration water use efficiency (ETwue) were determined. Values of Ky in the growing season (Ky 0.94) indicate that maize is moderately sensitive to water stress under the climate conditions of Serbia. The amounts of water used on evapotranspiration under irrigation (ETm) and non-irrigation (ETa) conditions ranged from 453 to 501 mm, and 257 to 363 mm, respectively. The values of Iwue and ETwue varied from 0.020 to 0.0361 ha-1/mm and 0.024 to 0.0381 ha-1/ mm, respe...
The study was aimed at determining the most suitable irrigation schedule program for hemp grown f... more The study was aimed at determining the most suitable irrigation schedule program for hemp grown for fibers by using evaporation from the free water surface (Eo), measured by a Class A pan and related crop plant coefficient (Kc). The experiment, carried out in Vojvodina, a northern part of the Republic of Serbia, included three irrigation regimes: I1, I2, and I3 corresponding, respectively, to daily evaporation from an open water surface (Eo), two interrow spacings: RS1 (12.5 cm) and RS2 (25 cm), and topped (T) and not topped (NT) variants. The Kc values used for the calculation of daily evapotranspiration (ETd) were 0.42 for April and May and 1.00 (I1), 0.80 (I2), and 0.60 (I3) from June to the harvest. In addition, the nonirrigated (Io) control variant was also included in the trial. The dioecious fiber hemp variety Marina was used for the trials. Irrigation was carried out by a drip irrigation system and was scheduled based on the water budget method. It started when readily avail...
The development of irrigation schedules based on water balance implies a study of daily plant wat... more The development of irrigation schedules based on water balance implies a study of daily plant water requirements. A properly selected irrigation method is also of most importance. The objective of this study was to find out how surface drip irrigation (SDI) and shallow subsurface drip irrigation (SSDI), as well as different ET-based irrigation scheduling for maize (reference evapotranspiration (ETo), pan evaporation (Eo), and local climatic coefficients (lc)), affect grain yield, water use efficiency (WUE), and yield response factor (Ky) of maize. The field experiments were conducted in Vojvodina, a northern part of the Republic of Serbia, on the calcareous gleyic chernozem soil, using a complete block design in three replicates in 2019–2021. The water balance method was used for irrigation scheduling. The nonirrigated treatment was used as a control. The yield in irrigation conditions was statistically higher as compared with the nonirrigated control variant. Concerning the tested ...
Drip irrigation is gaining importance in mitigating the consequences of water scarcity even in re... more Drip irrigation is gaining importance in mitigating the consequences of water scarcity even in regions with abundant rainfall. The transition from surface to subsurface drip irrigation is accompanied by numerous problems. To overcome these issues, shallow subsurface drip irrigation can be potentially used as an effective drought control tool that brings additional benefits compared to conventional surface drip irrigation techniques. This research investigated the effects of different calculations of daily crop water requirements, reference evapotranspiration (ETo), and pan evaporation (Eo) on the yield and water use efficiency of pepper irrigated with a surface and shallow subsurface drip irrigation system. The experiment was conducted in field conditions in the Vojvodina region, the northern part of Serbia. The irrigation scheduling was based on the water balance approach. The calculated evapotranspiration rate was about 400 mm for the pepper growing period, regardless of the calcu...
Field experiment was conducted to study the effects of surface (SDI) and shallow subsurface drip ... more Field experiment was conducted to study the effects of surface (SDI) and shallow subsurface drip irrigation (SSDI) on potato (Solanum tuberosum L.) tuber yield, evapotranspiration, water use efficiency (WUE), and yield response factor (K y). The experiment was carried out under semiarid climatic conditions in the Vojvodina region in 2020. The trial was established as a block design and adapted to technical specifications of drip irrigation system. In addition, the nonirrigated, control variant was also included in the trial. Irrigation was scheduled on the basis of water balance method. Daily water used on plants evapotranspiration (ET d) was calculated by multiplying reference evapotranspiration (ET o) with crop coefficients (k c). K c values were 0.5, 0.7, 1.1, 0.9, 0.7 from planting to emergence, early vegetative development, tuber initiation, tuber enlargement and senescence, respectively. The potato processing variety 'Taurus' was used for the experiment. Obtained results indicate a significant effect of irrigation on potato yield compared to the nonirrigated variant (38.33 t ha −1) but differences in the yield using the SDI (58.06 t ha −1) and the SSDI (61.15 t ha −1) were not significant. In the study period, seasonal evapotranspiration in irrigation conditions (ET m) and in rainfed control variant (ET a) was 478 mm and 319 mm respectively. IWUE values were 9.39, 10.85 kg m-3 and 27.64, 29.09 kg m-3 but ETWUE values were 12.40, 14.35 kg m-3 and 12.14, 12.79 kg m-3 for SDI and SSDI respectively. The seasonal yield response factor (K y) of 1.03 and 1.12 for SDI and SSDI indicates that potato can be grown without irrigation in the temperate climate of Vojvodina.
The aim of this study was to determine the effect of cover crops and interactions on yield and yi... more The aim of this study was to determine the effect of cover crops and interactions on yield and yield components of maize in the semi arid conditions. Research was carried out in the production years 2020 at the Rimski Šančevi experimental station of the Institute of Field and Vegetable Crops in Novi Sad. The winter cover crops consisted of the combined intercrops: winter pea (Pisum sativum ssp. arvense L.) + triticale (Triticosecale) (PT) and single-species cover crops winter pea (P) and control without cover crops (C), all with nitrogen fertilization 50 kg ha -1 (N50) and without the use of fertilizer (N0). The sowing of winter cover crops was carried out in autumn in the first decade of November, and their mulching and plowing was done in the last week of May. After plowing and soil preparation, maize (NS4051) was sown in the first decade of Jun and harvested in October. The statistical significance (p<0.05) was found between different variants regarding the use of cover crops....
The paper aimed at identifying wheat genotypes tolerant to drought stress. The study repeated in ... more The paper aimed at identifying wheat genotypes tolerant to drought stress. The study repeated in three consecutive years was done on the alluvial soil of the Southern Morava river valley in South Serbia. The average wheat grain yield was higher by 124.5% under irrigation conditions than without irrigation. Over the experimental period, the average water consumed on wheat evapotranspiration under irrigation conditions was higher by 38.9% than without irrigation. Based on correlation statistical results and principal component analysis (PCA), in the case of stress resistant wheat genotypes, stress susceptibility index (SSI), tolerance index (TOL), mean productivity (MP), geometric mean productivity (GMP), stress tolerance index (STI), yield index (YI), yield stability index (YSI) as well as the LSD test was proved to be invariably efficient for determining the stress-tolerant genotypes. The result of tolerance index concerning drought and LSD test denoted that the Pobeda variety had a...
A three-year study was conducted to assess the effects of irrigation on the yield and evapotransp... more A three-year study was conducted to assess the effects of irrigation on the yield and evapotranspiration of soybean grown on chernozem soil. The study was made for six soybean varieties, using several irrigation alternatives (60, 70 and 80% of field water capacity), paralleled by a non-irrigated control test. In all irrigation alternatives the yields were significantly higher than in the non-irrigated control test, in the average from 29.2 to 38.1%, noting that in two first years they were from 51.8 to 64.3% higher but in third year no differences were found between the irrigated alternatives and the non-irrigated control test. Evapotranspiration ranged from 468 to 576 mm in the irrigated alternatives, and from 390 to 5l4^mm in the control test.U trogodišnjim ispitivanjima određivan je efekat navodnjavanja na prinos i evapotranspiraciju soje koja je gajena na zemljištu tipa černozem. Ispitivano je 6 genotipova soje pri različitoj predzalivnoj vlažnosti zemljišta u navodnjavanju (60,...
The study of effects ofwater stress on yield and water use by maize plants was carried out in the... more The study of effects ofwater stress on yield and water use by maize plants was carried out in the experimental field of the Maize Research Institute at Zemun Polje in the period 2006-2008. Maize sensitivity to water stress was determined using a yield response factor (Ky). The values of Ky were derived from the linear relationship between relative evapotranspiration deficits (1-ETa/ETm) and relative yield decrease (1-Ya/Ym). To assess the irrigation effect on maize yield, irrigation water use efficiency (Iwue) and evapotranspiration water use efficiency (ETwue) were determined. Values of Ky in the growing season (Ky 0.94) indicate that maize is moderately sensitive to water stress under the climate conditions of Serbia. The amounts of water used on evapotranspiration under irrigation (ETm) and non-irrigation (ETa) conditions ranged from 453 to 501 mm, and 257 to 363 mm, respectively. The values of Iwue and ETwue varied from 0.020 to 0.0361 ha-1/mm and 0.024 to 0.0381 ha-1/ mm, respe...
The study was aimed at determining the most suitable irrigation schedule program for hemp grown f... more The study was aimed at determining the most suitable irrigation schedule program for hemp grown for fibers by using evaporation from the free water surface (Eo), measured by a Class A pan and related crop plant coefficient (Kc). The experiment, carried out in Vojvodina, a northern part of the Republic of Serbia, included three irrigation regimes: I1, I2, and I3 corresponding, respectively, to daily evaporation from an open water surface (Eo), two interrow spacings: RS1 (12.5 cm) and RS2 (25 cm), and topped (T) and not topped (NT) variants. The Kc values used for the calculation of daily evapotranspiration (ETd) were 0.42 for April and May and 1.00 (I1), 0.80 (I2), and 0.60 (I3) from June to the harvest. In addition, the nonirrigated (Io) control variant was also included in the trial. The dioecious fiber hemp variety Marina was used for the trials. Irrigation was carried out by a drip irrigation system and was scheduled based on the water budget method. It started when readily avail...
Uploads
Papers by Borivoj Pejić