ОПРЕДЕЛУВАЊЕ НА БИОКЛИМАТСКИ КОЕФИЦИЕНТ КАЈ ДОМАТ ПРИ ПРИМЕНА НА РАЗЛИЧНИ ТЕХНИКИ НА НАВОДНУВАЊЕ И ЃУБРЕЊЕ

The experimental trial was conducted with tomato hybrid Optima at open field near by the Faculty of Agricultural Sciences and Food in Skopje, during the period of May to September in 2003 and 2004. The main aim of this investigation was to determinate bioclimatic coefficient of tomato crop in Skopje region under different irrigation and fertilization techniques. Five different treatments of irrigation and fertilization regime of tomato crop were aim of our investigation. The first three treatments were irrigated by drip irrigation and drip fertigation, the treatment four was irrigated with drip irrigation and conventional application of fertilizers and the last one the treatment five was under furrow irrigation and conventional application of fertilizers. From the average results in two years of investigation, it can be concluded that the lowest average bioclimatic coefficient shows treatments В1 and В2 (drip fertigation every 2 and 4 days) or 1,66 and 1,67. As a result of longer irrigation frequencies (drip fertigation every 6 days), bioclimatic coefficient in treatment В3 was 1,71 or 2,4 to 3% higher in comparison with В2 and В1. Тhe control treatment with drip irrigation and conventional application of fertilizers (Ø1) showed same results as treatment В2, which is result of irrigation regime. The effect of irrigation techniques on bioclimatic coefficient is presented by the comparison of the results from the control treatments Ø1 and Ø2 (furrow irrigation and conventional application of fertilizers). Namely, control treatment Ø2 show the highest hydrophytotermical coefficient or 2,15, which is almost 29% higher value in comparison with Ø1

The Influence of Drip Fertigation on Water Use Efficiency in Tomato Crop Production

The primary objective of this study was to determine the best irrigation and fertigation practice for tomato crop (Lycopersicon esculentum Mill.) in order to achieve highest yield with maximum water use efficiency (WUE). The field experiments were conducted during the period of May to September in 2002, 2003 and 2004. Five experimental treatments tested in this study included the following: the first three treatments (T1, T2, and T3) included a combination of drip irrigation and fertigation, treatment four (T4) included drip irrigation, but with conventional application of fertilizer, and the fifth treatment, (T5), included furrow irrigation practice with conventional application of fertilizer. The results of this study show that the drip fertigation treatments (T1, T2, and T3) gave significantly higher tomato yields in comparison with treatments T4 and T5, almost 24% and 39%. During three years of research treatments under drip fertigation showed almost 28% more water use efficiency in comparison with the treatment with conventional application of fertilizer and drip irrigation and 87% more than the treatment with furrow irrigation and conventional application of fertilizer. So, it is clear that the drip fertigation led to an increased yield, indicating enhanced water use efficiency

Nitrogen Fertilizer Use Efficiency of Pepper as Affected by Irrigation and Fertilization Regime

The pepper producers in the Republic of Macedonia have used drip irrigation systems to increase yield in recent years, but more research is still needed, related to irrigation scheduling and precise requirement of nitrogen fertilizer to maximise pepper yield. Therefore, a two year experiment was conducted in a plastic house to determine the nitrogen fertilizer use efficiency (NFUE) and yield potential of pruned pepper as affected by irrigation and fertilization regime. Four experimental treatments were applied in this study. Three of the treatments were drip fertigated (DF1, DF2, DF3), while the fourth treatment was furrow irrigated with conventional fertilization (ØB). The labelled urea with 1% concentration of a stable isotope of nitrogen (15N) was applied for determination of NFUE. The results of this study clearly showed that increased NFUE and pepper yield depend on irrigation and fertilization regime. Namely, NFUE was significantly increased with the application of nitrogen fertilizer through drip irrigation system as compared to conventional fertilization with furrow irrigation. Also, drip fertigation frequency positively affects percentage increase of NFUE. Furthermore, our results showed that drip fertigation treatments resulted in significantly higher pepper yields in comparison to conventional fertilization. Also, drip fertigation frequency at four and two days (DF2 and DF1) resulted in higher yields when compared with drip fertigation scheduled by using tensiometers (DF3). Generally, to reach acceptable pepper yield with high NFUE, we recommend drip fertigation with a frequency of two to four days combined with two main shoots of pruned pepper in order to increase farmer’s income and to minimize the environmental impact

ВЛИЈАНИЕ НА КАПКОВОТО НАВОДНУВАЊЕ И ФЕРТИРИГАЦИЈА ВРЗ МЕСЕЧНИОТ И ВЕГЕТАЦИСКИОТ ХИДРОФИТОТЕРМИЧКИ КОЕФИЦИЕНТ КАЈ ПИПЕРКАТА

The main aim of this investigation was to determinate the effect of drip fertigation on hydofphytotermical coefficient of two stem pruned pepper crop (“V”system). The field experiments were conducted with green pepper crop ‘Bela dolga’ grown in experimental plastic house near by the Faculty of Agricultural Sciences and Food in Skopje, during the period of May to October in 2005, 2006 and 2007. Therefore, four experimental treatments were applied in this study. Three treatments were irrigated with drip irrigation and drip fertigation (KK1, KK2, KK3), while the last one was irrigated with furrow irrigation and conventional application of fertilizer (control treatment ØB). From the results obtained during the three years of investigation, it can be concluded that the average hydrophytotermical coefficient in 2005 is 1.52 in 2006 the coefficient is decreasing (1.46), while in 2007 hydrophytotermical coefficient again is increasing (1.48). According to year of investigation, the treatments with drip fertigation (KK1, KK2, KK3) shows from 14.6 to 23.6% lower average hydrophytotermical coefficient in comparison with treatment with furrow irrigation and traditional application of fertilisers ØB

The influence of several characteristic on the yield of flax seed Linum usitatissimum L.

The main objective of three-year experiments was (0 appraise influence of several characteristics on the seed yield of flax - Linum usitatissimum L. The research material is consisting of the following varieties: belan, belinka. duferin , viking and domestic population velusina. We examinate: duration of the vegetation period. the hight of the plants. number of capsules per plant. weight of the seed per plant and appsolute weight of the seed. According from the results which we obtaition between yield of the seed and mention characteristics. Exemption is hight of the plants who show negative value . From the yield of the seed we conclude significant statistical differences on the 0.01% level between be lan, duferin. viking and vclusina comparing with variety belinka which gave the lowest production. Between the others statistical differences does not exist. Collection data has been statistically analysed by method analysis of variance on the two factors experiments and checked by LSD - Test

Th e Infl uence of Drip Fertigation on Water Use Effi ciency in Tomato Crop Production

Summary Th e primary objective of this study was to determine the best irrigation and fertigation practice for tomato crop (Lycopersicon esculentum Mill.) in order to achieve highest yield with maximum water use effi ciency (WUE). Th e fi eld experiments were conducted during the period of May to September in 2002, 2003 and 2004. Five experimental treatments tested in this study included the following: the fi rst three treatments (T1, T2, and T3) included a combination of drip irrigation and fertigation, treatment four (T4) included drip irrigation, but with conventional application of fertilizer, and the fi ft h treatment, (T5), included furrow irrigation practice with conventional application of fertilizer. Th e results of this study show that the drip fertigation treatments (T1, T2, and T3) gave signifi cantly higher tomato yields in comparison with treatments T4 and T5, almost 24% and 39%. During three years of research treatments under drip fertigation showed almost 28% more water use effi ciency in comparison with the treatment with conventional application of fertilizer and drip irrigation and 87% more than the treatment with furrow irrigation and conventional application of fertilizer. So, it is clear that the drip fertigation led to an increased yield, indicating enhanced water use effi ciency

Nitrogen Fertilizer Use Efficiency of Pepper as Affected by Irrigation and Fertilization Regime

The pepper producers in the Republic of Macedonia have used drip irrigation systems to increase yield in recent years, but more research is still needed, related to irrigation scheduling and precise requirement of nitrogen fertilizer to maximise pepper yield. Therefore, a two year experiment was conducted in a plastic house to determine the nitrogen fertilizer use efficiency (NFUE) and yield potential of pruned pepper as affected by irrigation and fertilization regime. Four experimental treatments were applied in this study. Three of the treatments were drip fertigated (DF1, DF2, DF3), while the fourth treatment was furrow irrigated with conventional fertilization (ØB). The labelled urea with 1% concentration of a stable isotope of nitrogen (15N) was applied for determination of NFUE. The results of this study clearly showed that increased NFUE and pepper yield depend on irrigation and fertilization regime. Namely, NFUE was significantly increased with the application of nitrogen fertilizer through drip irrigation system as compared to conventional fertilization with furrow irrigation. Also, drip fertigation frequency positively affects percentage increase of NFUE. Furthermore, our results showed that drip fertigation treatments resulted in significantly higher pepper yields in comparison to conventional fertilization. Also, drip fertigation frequency at four and two days (DF2 and DF1) resulted in higher yields when compared with drip fertigation scheduled by using tensiometers (DF3). Generally, to reach acceptable pepper yield with high NFUE, we recommend drip fertigation with a frequency of two to four days combined with two main shoots of pruned pepper in order to increase farmer’s income and to minimize the environmental impact.This article is published as Tanaskovik, Vjekoslav, Ordan Cukaliev, Rameshwar S. Kanwar, K. HENG Lee, Mile Markoski, and Velibor Spalevic. "Nitrogen Fertilizer Use Efficiency of Pepper as Affected by Irrigation and Fertilization Regime." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 44, no. 2 (2016). doi: 10.15835/nbha44210415. Posted with permission.</p