Agriculture
Hossein Sahabi; Fatemeh Moallem Banhangi; Ali Bagheri
Abstract
Monitoring of yield indicators, such as evaluating the trend and yield stability, can open the way for future policies and decisions in order to maintain and improve the yield of important agricultural products in Iran's agricultural systems. The aim of this study was to investigate and establish the ...
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Monitoring of yield indicators, such as evaluating the trend and yield stability, can open the way for future policies and decisions in order to maintain and improve the yield of important agricultural products in Iran's agricultural systems. The aim of this study was to investigate and establish the stability of saffron yield in selected cities of Khorasan-Razavi province during the years 1400-1401 was conducted at Torbat Heydarieh University. To achieve this objective, data regarding saffron cultivation area and yield from various cities in Khorasan-Razavi Province were gathered from available statistics published by the Ministry of Agriculture Jihad, Iran, over 34 years (1365-1399). Following data validation, five cities – namely Torbat Heydarieh, Neishabur, Kashmir, Gonabad, and Taibad – were chosen based on the availability of comprehensive statistics. Additional information was then collated through questionnaires and forms by liaising with the agricultural jihad and research centers in each city. Utilizing regression analysis, this research delved into the long-term trends of yield and cultivated area, exploring relative and absolute yield residuals and investigating coefficients of yield changes. The study unveiled that the cultivated saffron area expanded across all surveyed cities until 2007-2008. However, in the latter years of the study, specifically in cities with high average saffron yield, such as Gonabad and Torbat Heydarieh, a marked decline in cultivated area was observed. Over the past 34 years, a notable decline in saffron yield has been observed in Torbat Heydarieh, Gonabad, and Kashmar. Notably, Gonabad, which had the highest average yield over this period, experienced the most substantial decrease in yield, amounting to 0.09 kg per hectare per year. Unfortunately, the degree of yield stability in the saffron cultivation ecosystems of the studied cities was not favorable. In particular, the relative residual yield across different cities ranged from 0.01% to 159.1%, indicating significant instability in saffron cultivation ecosystems within Khorasan Razavi province. The coefficient of variation of yield trends exhibited a decline in all surveyed cities except. The average rate of change in these cities was computed to be very low at -0.005% per year, implying that the enhancement of yield stability in these regions was occurring at a notably sluggish pace.
Other subject about saffron
hossein sahabi; fatemeh moallem banhangi
Abstract
In order to evaluate the trend of saffron yield and study the relationship between saffron yield fluctuations and various climatic parameters, research was designed and conducted in Mashhad, Torbat Heydariyeh, Kashmar, Birjand and Qaen during 20 years (1998-2018). According to meteorological data from ...
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In order to evaluate the trend of saffron yield and study the relationship between saffron yield fluctuations and various climatic parameters, research was designed and conducted in Mashhad, Torbat Heydariyeh, Kashmar, Birjand and Qaen during 20 years (1998-2018). According to meteorological data from the last 20 years, the average rainfall decreased by 33% and the average temperature increased by 0.5 °C . On the other hand, the regression results between yield and climatic parameters indicates that the pattern of temperature rise and decreased rainfall in all studied cities was significantly in line with saffron yield declining. In this period, the study's findings also revealed that over the last 20 years, an average of 112.3 hectares of saffron cultivation have been added to the areas under cultivation of saffron and at the same time, saffron yields have dropped by an average of 0.08 kg per hectare. Climatic indicators significantly affected decreased saffron yield in Razavi and South Khorasan. The results also revealed that the average and maximum temperature were the main variables influencing the reduction of saffron yield. For instance in Torbat-e Heydarieh, the variable of average temperature predicted 42 percent of the variability of the yield and in other cities studied, the maximum temperature variable predicted between 24 and 56% of the variability of the yield. Furthermore, the results of the time series analysis of saffron yield revealed that saffron yield will show a decreasing and negative trend by 2025 in all studied cities. Up to 2025, Mashhad and Kashmar with a slope of 0.09 and 0.07 kg/ha, had the highest and lowest decreasing trends, respectively.
Agriculture
hossein sahabi; Mohsen jahan; alireza kochaki; Mehdi Nassiri Mahallati
Abstract
In general, corm weight and nutrient management are considered as the most important factors in relation to quantitative and qualitative traits of saffron. In order to investigate the effects of mother corm origin, mother corm weight and nutrient foliar application on yield and qualitative traits of ...
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In general, corm weight and nutrient management are considered as the most important factors in relation to quantitative and qualitative traits of saffron. In order to investigate the effects of mother corm origin, mother corm weight and nutrient foliar application on yield and qualitative traits of saffron, a field experiment was conducted as factorial layout based on a randomized complete block design with three replications at the Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, during the years from 2012 to 2015. The mother corm origin (Iranian and Spanish corms), mother corm weight 8 g and lower (small), 8.1–15 g (medium) and 15.1-23 g (large) and nutrient foliar application (application and control) were considered as the first, second and third experimental factors, respectively. According to the results, the larger mother corms significantly resulted in a greater number of flowers per m2, increased fresh flower and dry stigma + style yields. However, the effect of nutrient foliar application was observed to be not significant on these traits. When Iranian mother corms were planted, the number of flowers per m2, fresh flower and dry stigma + style yields were higher, compared with Spanish mother corms. For instance, flower number, fresh flower and dry stigma + style yields increased by 17, 13 and 14%, respectively, when planting Iranian mother corms. Nonetheless, picrocrocin concentration was higher (up to 3.8%) in the Spanish planted corm treatment. Based on the results, beside the optimal nutrient foliar application, the importance of adapting the corms origin with environmental conditions of the site designated for planting is emphasized.
Processing, food industry and biochemistry
Ali ArastehNodeh; hossein sahabi
Abstract
In this study, the dilute acid Hydrolysis of saffron waste as a lignocellulose biomass for fermentable sugar production as a green fuel is investigated. Saffron plant waste was collected, washed with distilled water, dried by being exposed to air and sunlight, milled by a disk mill up to 50 micrometers ...
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In this study, the dilute acid Hydrolysis of saffron waste as a lignocellulose biomass for fermentable sugar production as a green fuel is investigated. Saffron plant waste was collected, washed with distilled water, dried by being exposed to air and sunlight, milled by a disk mill up to 50 micrometers and kept in plastic at room temperature. The prepared biomass was heated in a specified acidic solution for a predetermined time period in the autoclave. The influences of 3 major parameters including temperature, acid concentration and time on the produced fermentable sugar is investigated by the response surface method. According to previous studies, the levels for pretreatment were: temperature (116, 124, 132, and 140oC), process time (20, 30, 40, and 50 minute and sulfuric acid concentration (0, 1, 2, and 3%). To determine the type and quantity of products, the filtered solution was analyzed by HPLC and the results (glucose, xylose and furfural) were modeled by a quadratic equation. This model showed that glucose concentration was influenced by the quadratic power of acid concentration and time while xylose concentration was influenced by time and furfural depends on time alone. It may be concluded that high acid concentration, low temperature and medium time could produce maximum products (glucose and xylose) with minimum inhibitor (furfural).
Other subject about saffron
hossein sahabi; Mohsen Jahan; Alireza Kochaki; Mahdi Nasiri
Abstract
The corm size, nutrient management and corm type are the most important factors that may affect the quantitative and qualitative characteristics of saffron (Crocus sativus L.). In order to study the effect of mother corm size and nutrient foliar application on flower and corm yield of Spanish and Iranian ...
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The corm size, nutrient management and corm type are the most important factors that may affect the quantitative and qualitative characteristics of saffron (Crocus sativus L.). In order to study the effect of mother corm size and nutrient foliar application on flower and corm yield of Spanish and Iranian Saffron landrace, an experiment was conducted with factorial arrangement based on randomized complete block design with three replications during two growing seasons (2013-14 and 2014-15) at the Faculty of Agriculture of the Ferdowsi University of Mashhad, Iran .The saffron corm type was considered in two levels (Iranian corm and Spanish corm), mother corm size were in three levels (1- 8g, 8.1- 15g, 15.1- 23g) and nutrient foliar application were in two levels (control and sprayed leaves with 7% micro and macro nutrients). The results showed that the effect of different mother corm size, corm type and nutrient foliar application on the number of flowers, flower fresh and dry weight (stigma + style) were significant. The highest number of flowers (48.6 flower.m-2), flower fresh weight (24.3 g.m-2) and saffron (stigma + style) dry weight (0.25 g.m-2) were obtained in 15.1-23g mother corm size, and the lowest were obtained in 8g > mother corms. In contrast, nutrient foliar application had not significant effect on total produced daughter corms. However, the highest number of flowers (43.7 flower.m-2), flower fresh weight (21.8 g.m-2) and stigmas dry weight (0.23 g.m-2) were obtained from Iranian corms in the second year. Hence, the use of appropriate weight for planting Iranian corms (over 15 g) with nutrient of foliar application can be useful for increasing the performance of the flowers and saffron corms.
Other subject about saffron
Ramin Nazarian; Hossein sahabi; Hassan Feizi; Ahmad Ahmadian
Abstract
In order to study the effect of planting density on flower and corm yield of Spanish and Iranian saffron (Crocus sativus L.) types, an experiment was arranged in factorial with randomized complete block design with three replications. This experiment was conducted on the Research Farm of the Faculty ...
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In order to study the effect of planting density on flower and corm yield of Spanish and Iranian saffron (Crocus sativus L.) types, an experiment was arranged in factorial with randomized complete block design with three replications. This experiment was conducted on the Research Farm of the Faculty of Agriculture, Ferdowsi University of Mashhad in 2013-15. The saffron corm type was considered in two levels (a1: Iranian corm and a2: Spanish corm) and the planting densities were in three levels (d1:40, d2:48 and d3:60 corm.m-2). The two year results showed that the effect of different planting density and saffron corm types on the number of flowers, flower fresh and dry weight (stigma + style) and number of replacement corms were significant (P<0.01) while, the effect of corm type on fresh and dry weight of replacement corms was not significant. The highest number of flowers (30.25 No.m-2), flower fresh weight (15.125 g. m-2) and (stigma + style) dry weight (0.16 g.m-2) were obtained in d2 (48 corm.m-2), respectively. Corm type had significant effects on saffron flower characteristics. The highest numbers of flowers (27.21 No.m-2), flower fresh weight (13.58 g.m-2) and (stigma + style) dry weight (0.144 g.m-2) were obtained from Iranian corms (a1), respectively. However, the highest number (222.83 No.m-2), fresh weight (694.92 g.m-2) and dry weight (270.32 g.m-2) of replacement corms were obtained from Spanish corms (a2), respectively. The years had significant effects on saffron flower and corm characteristics as the highest amounts were obtained in second year (Y2), respectively.
Agriculture
Hassan Feizi; Abdollah Mollafilabi; Hossein Sahabi; Ahmad Ahmadian
Abstract
In order to investigate the effects of summer irrigation and conservation tillage on flower characteristics and corms behavior of Saffron (Crocus sativus L.), a field experiment was conducted during 2009- 2010, at Faculty of Agriculture, University of Torbat-e-Heydarieh, Iran. A factorial trial based ...
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In order to investigate the effects of summer irrigation and conservation tillage on flower characteristics and corms behavior of Saffron (Crocus sativus L.), a field experiment was conducted during 2009- 2010, at Faculty of Agriculture, University of Torbat-e-Heydarieh, Iran. A factorial trial based on complete randomized block design with four replications was used. The experimental treatments were all combination of summer irrigations (July, August, July + August and no irrigation) and conservation tillage (application and non- application). Based on analysis of variance, in the first and second years, summer irrigation had significant effects on number and flower yield of saffron. In the first year, the highest number of flower, flower and stigma yield of saffron significantly observed by irrigation on July + August (25 flowers per m2, 12.1 and 0.16 g.m-2, respectively,). In the second year, irrigation in August had highest significant effects on mentioned characteristics of saffron (127.4 flowers per m2, 61.4 and 0.87 g.m-2, respectively). In the first year, flower and stigma yields of saffron significantly increased by conservation tillage (by 11.3 and 11.7%), as compared to control (no conservation tillage). In addition, summer irrigation and conservation tillage significantly increased picrocrocin content.
Agriculture
Hassan Feizi; Seyyed Mohammad Seyyedi; Hossein Sahabi
Abstract
Saffron (Crocus sativus L.) propagates by replacement corms producing from the mother corm after flowering during each season. In order to investigate the effect of corm planting density, organic and chemical fertilizers on formation and phosphorus uptake of saffron replacement corms during phonological ...
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Saffron (Crocus sativus L.) propagates by replacement corms producing from the mother corm after flowering during each season. In order to investigate the effect of corm planting density, organic and chemical fertilizers on formation and phosphorus uptake of saffron replacement corms during phonological stages, a field experiment was conducted as factorial layout based on randomized complete block design with three replications, at Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, during 2013 and 2014 growing seasons. The experimental treatments were all combination of different levels of planting density (25, 50, 75 and 100 corms per m2) and fertilizer sources (manure 25 t. ha-1, chemical fertilizer (N 150 kg ha-1 + P 75 kg ha-1) and control). Due to different sampling dates of replacement corms during phonological stages (21 November, 21 December, 20 January, 20 April and 21 May, respectively), the experimental data were analyzed as factorial - split in time based on a randomized complete block design. Based on results, the highest number of replacement corms lower than 4 g (5.8 corms per plant) were observed in fifth sampling stage and then decreased. In all levels of planting density (25 to 100 corms per m2), the effects of manure on increasing the number, weight and phosphorus content of replacement corms in range of 4.1 to 8 and 8.1 to 12 g per plant were significantly higher than chemical fertilizer. In fifth sampling stage, by applying the manure, the weight and phosphorus content of replacement corms in range of 8.1 to 12 g per plant were significantly increased (approximately twice), as compared to chemical fertilizer. It seems the decrease in saffron yield as result to decreasing the corm planting density can be slightly offset by increasing the percentage of larger corms formation per plant.
