Pub Date : 2023-06-01DOI: 10.15547//ast.2023.02.021
S. Slavova
Abstract. The purpose of the present study was to establish the economic performance of sheep farms of the Local Stara Zagora breed. Production and economic results of three private farms in southern Bulgaria were studied for 2022. Data were obtained from the farmers after filling in questionnaires. Sheep have been raised in stall-pasture system with grazing period lasting from March to November, and stall period from December to February, and one lambing per year. Revenues, costs, profit (BGN) and profitability (%) on the farms were calculated. Revenues from the sale of milk were estimated to account for 39% of gross production, and subsidies – 24% of total revenues, on average. Feed costs accounted for 56% of total costs on farms. Farm 1 and farm 3 yielded low profits estimated at BGN 8.90 and BGN 6.28 per ewe, respectively, while farm 2 operated at a loss of BGN -33.61 per ewe. Therefore, farms’ survival is at risk, and due to increasing prices of feed, energy, labour and fuels they may not stay viable in the future. In such small sheep populations maintaining instead of targeted selection is performed and particular results in improving the level of the main selection traits cannot be expected. Measures for improving nutritional management and feed efficiency are considered fundamental for the future sustainability of the breed and also adequate support must be provided to maintain the population size in the future and its conservation as valuable genetic resource in the country.
{"title":"Economic performance of sheep farms of the Local Stara Zagora breed","authors":"S. Slavova","doi":"10.15547//ast.2023.02.021","DOIUrl":"https://doi.org/10.15547//ast.2023.02.021","url":null,"abstract":"Abstract. The purpose of the present study was to establish the economic performance of sheep farms of the Local Stara Zagora breed. Production and economic results of three private farms in southern Bulgaria were studied for 2022. Data were obtained from the farmers after filling in questionnaires. Sheep have been raised in stall-pasture system with grazing period lasting from March to November, and stall period from December to February, and one lambing per year. Revenues, costs, profit (BGN) and profitability (%) on the farms were calculated. Revenues from the sale of milk were estimated to account for 39% of gross production, and subsidies – 24% of total revenues, on average. Feed costs accounted for 56% of total costs on farms. Farm 1 and farm 3 yielded low profits estimated at BGN 8.90 and BGN 6.28 per ewe, respectively, while farm 2 operated at a loss of BGN -33.61 per ewe. Therefore, farms’ survival is at risk, and due to increasing prices of feed, energy, labour and fuels they may not stay viable in the future. In such small sheep populations maintaining instead of targeted selection is performed and particular results in improving the level of the main selection traits cannot be expected. Measures for improving nutritional management and feed efficiency are considered fundamental for the future sustainability of the breed and also adequate support must be provided to maintain the population size in the future and its conservation as valuable genetic resource in the country.","PeriodicalId":55762,"journal":{"name":"Agricultural Science and Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42241360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.15547/ast.2023.01.007
D. Kehayov, I. Bojkov, I. Zahariev, Galya Hristova
Abstract. A methodology has been developed for the selection of an electric motor for the replacement of the mechanical with electric drive of the sowing apparatus of the Saxonia A200 seeder. The gear ratio, angular velocity and torque required to drive the sowing apparatus have been determined. As a result, 22.65 W of motor power is calculated.
{"title":"Determining parameters of an electric drive for sowing apparatus of the Saxonia A200 seed drill","authors":"D. Kehayov, I. Bojkov, I. Zahariev, Galya Hristova","doi":"10.15547/ast.2023.01.007","DOIUrl":"https://doi.org/10.15547/ast.2023.01.007","url":null,"abstract":"Abstract. A methodology has been developed for the selection of an electric motor for the replacement of the mechanical with electric drive of the sowing apparatus of the Saxonia A200 seeder. The gear ratio, angular velocity and torque required to drive the sowing apparatus have been determined. As a result, 22.65 W of motor power is calculated.","PeriodicalId":55762,"journal":{"name":"Agricultural Science and Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49581473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.15547/ast.2023.01.005
Abduljabar khalil Ibrahim, A. Jimin
Abstract. A field experiment was conducted in 2018 and 2019 in Lafia, Nigeria to determine the effects of single and tank-mix of seven selected herbicides (bispyribac-sodium; cyhalofop-butyl; penoxsulam; pendimenthalin; propanil; thiobencarb) and their mixtures in lowland rice (Oryza sativa L.). Rice grain yield following the single application of bispyribac-sodium post emergence (POST), cyhalofop-butyl POST and penoxsulam POST averaged 30% and 47% greater than the nontreated control in 2018 and 2019, respectively. The application of cyhalofop-butyl plus bispyribac-sodium or thiobencarb plus bispyribac-sodium POST reduced weed density over nontreated control, ranging 98 to 100% in 2018 compared to 88 – 91% reduction in weed density achieved with the application of cyhalofop-butyl alone and the sequential application of PRE pendimenthalin fb POST propanil. Bispyribac-sodium plus cyhalofop-butyl application resulted in the highest rice yield (5.13 and 5.60 t.ha−1) in 2018 and 2019, respectively. Mixtures of bispyribac–sodium with chyhalofop-butyl showed no injury on rice, whereas increased efficacy on weed control as compared with the single application of bispyribac–sodium. We recommend bispyribac-sodium and tank-mixed combination with cyhalofop-butyl to provide a broad spectrum of weed control in lowland rice system in Nigeria.
{"title":"Effect of single and tank-mix of selected herbicides on weed control and yield of lowland Rice (Oryza sativa L.) in Lafia, Nasarawa State of Nigeria","authors":"Abduljabar khalil Ibrahim, A. Jimin","doi":"10.15547/ast.2023.01.005","DOIUrl":"https://doi.org/10.15547/ast.2023.01.005","url":null,"abstract":"Abstract. A field experiment was conducted in 2018 and 2019 in Lafia, Nigeria to determine the effects of single and tank-mix of seven selected herbicides (bispyribac-sodium; cyhalofop-butyl; penoxsulam; pendimenthalin; propanil; thiobencarb) and their mixtures in lowland rice (Oryza sativa L.). Rice grain yield following the single application of bispyribac-sodium post emergence (POST), cyhalofop-butyl POST and penoxsulam POST averaged 30% and 47% greater than the nontreated control in 2018 and 2019, respectively. The application of cyhalofop-butyl plus bispyribac-sodium or thiobencarb plus bispyribac-sodium POST reduced weed density over nontreated control, ranging 98 to 100% in 2018 compared to 88 – 91% reduction in weed density achieved with the application of cyhalofop-butyl alone and the sequential application of PRE pendimenthalin fb POST propanil. Bispyribac-sodium plus cyhalofop-butyl application resulted in the highest rice yield (5.13 and 5.60 t.ha−1) in 2018 and 2019, respectively. Mixtures of bispyribac–sodium with chyhalofop-butyl showed no injury on rice, whereas increased efficacy on weed control as compared with the single application of bispyribac–sodium. We recommend bispyribac-sodium and tank-mixed combination with cyhalofop-butyl to provide a broad spectrum of weed control in lowland rice system in Nigeria.","PeriodicalId":55762,"journal":{"name":"Agricultural Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67424125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.15547/ast.2023.01.009
Y. Ivanova, R. Bozhilov, S. Ivanov
Abstract. The idea of designing a controller for electrical energy management is due to the need for energy saving and intelligent management of the consumed energy. The article presents the designed and studied device designed to limit the consumption of electrical energy within one day and the magnitude of the load current in single-phase circuits. Thus, the consumer (household consumer) of electrical energy can use the energy at time and in amount at will, but within pre-set limits. The paper discusses the principle of operation of the device for power consumption management, its main characteristics, and applications.
{"title":"Energy management controller","authors":"Y. Ivanova, R. Bozhilov, S. Ivanov","doi":"10.15547/ast.2023.01.009","DOIUrl":"https://doi.org/10.15547/ast.2023.01.009","url":null,"abstract":"Abstract. The idea of designing a controller for electrical energy management is due to the need for energy saving and intelligent management of the consumed energy. The article presents the designed and studied device designed to limit the consumption of electrical energy within one day and the magnitude of the load current in single-phase circuits. Thus, the consumer (household consumer) of electrical energy can use the energy at time and in amount at will, but within pre-set limits. The paper discusses the principle of operation of the device for power consumption management, its main characteristics, and applications.","PeriodicalId":55762,"journal":{"name":"Agricultural Science and Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48985351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.15547/ast.2023.01.008
A. Zidan, M. Ibraheem
Abstract. This work was carried out in the summer of 2020 to take an advantage of the spent mushroom compost SMC for the potato cropping and improving soil fertility towards reducing the excessive use of chemical fertilizers, which are commonly used in the traditional methods of growing potatoes, and considered as a source of contamination of the groundwater and streams and raise the cost of production. This experiment was designed by the application of SMC in the cultivation of potato crop var. Spunta, in the bedding medium, at increasing gradual rates (0, 25, 50, 75 and 100%, v/v), to be compared with soil and organic manure mixed with chemical fertilizers as an ideal treatment. The effect of the above-mentioned levels of SMC on soil fertility was very clear, where the results did not show any negative impact on soil properties in spite of its high recorded salinity (EC1/1 = 9.53 dS.m -1) and tended to retain soil fertility through increasing its contents of organic matter OM and nutrients before and after potato crop cultivation. The lowest level of compost 25% SMC, increased the concentration of OM in the soil to 18.4% compared with 4.5% in the control, and raised N concentration in the soil from 0.3% in the control to 1.8% in the treatment 100% SMC before planting. The cumulative effect of OM in the soil after harvest has risen from 3.3% in the control to 12.6% in the treatment 25% SMC, and N content from 0.15% for the control to 1.05 % for treatment 100% SMC. But the cumulative effect for available P in the soil was not positive because of lime effect and consumption in the growth and production process. Also, K did not show a clear cumulative effect because of the richness of the soil before and after planting and its high ability for loss in the organic soil by leeching.
{"title":"The cumulative effect of spent mushroom compost on some chemical properties of the soil under potato cropping conditions","authors":"A. Zidan, M. Ibraheem","doi":"10.15547/ast.2023.01.008","DOIUrl":"https://doi.org/10.15547/ast.2023.01.008","url":null,"abstract":"Abstract. This work was carried out in the summer of 2020 to take an advantage of the spent mushroom compost SMC for the potato cropping and improving soil fertility towards reducing the excessive use of chemical fertilizers, which are commonly used in the traditional methods of growing potatoes, and considered as a source of contamination of the groundwater and streams and raise the cost of production. This experiment was designed by the application of SMC in the cultivation of potato crop var. Spunta, in the bedding medium, at increasing gradual rates (0, 25, 50, 75 and 100%, v/v), to be compared with soil and organic manure mixed with chemical fertilizers as an ideal treatment. The effect of the above-mentioned levels of SMC on soil fertility was very clear, where the results did not show any negative impact on soil properties in spite of its high recorded salinity (EC1/1 = 9.53 dS.m -1) and tended to retain soil fertility through increasing its contents of organic matter OM and nutrients before and after potato crop cultivation. The lowest level of compost 25% SMC, increased the concentration of OM in the soil to 18.4% compared with 4.5% in the control, and raised N concentration in the soil from 0.3% in the control to 1.8% in the treatment 100% SMC before planting. The cumulative effect of OM in the soil after harvest has risen from 3.3% in the control to 12.6% in the treatment 25% SMC, and N content from 0.15% for the control to 1.05 % for treatment 100% SMC. But the cumulative effect for available P in the soil was not positive because of lime effect and consumption in the growth and production process. Also, K did not show a clear cumulative effect because of the richness of the soil before and after planting and its high ability for loss in the organic soil by leeching.","PeriodicalId":55762,"journal":{"name":"Agricultural Science and Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42604602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.15547/ast.2023.01.010
A. I. Agholor, K. Ogujiuba, I.N Shongwe
Abstract. Restricted access to markets and complex rules remain a global barrier to growing small enterprises. A randomized sample of 200 farmers were carefully selected for the study. The study assessed farmers methods of linking to markets in Mbombela South Africa and analyse the determinants of engaging in specific types of markets. Structured and semi-structured questionnaires divided into sections were applied. The descriptive statistics and logistic regression methods were used for data analysis. The results showed that majority of smallholder farmers used informal markets and linkage to market information is through cell phone. Some of the major challenges farmers faced when accessing markets were transportation and inadequate market information. The empirical results of the study showed that the variables that positively influenced the choice of specific types of markets by farmers were gender (P<0.030), age (P<0.007), distance to markets (P<0.057), easiness of accessing markets (P<0.007), challenges with accessing markets (P<0.042) and access to extension services (P<0.003). The study concluded that the smallholder farmers in the Mbombela Local Municipality have difficulties in accessing formal markets and rely on informal markets to sell their farm products. The study recommended that farmers should be trained on the use of social media channels in accessing agricultural markets. Government should support to improve infrastructures like roads to assist farmers in accessing market. The study concluded that transport costs should be managed through shared and collective transportation arrangement with other farmers to convey farm produce to the markets for sale.
{"title":"Determinants of small farmers access to agricultural markets in South Africa","authors":"A. I. Agholor, K. Ogujiuba, I.N Shongwe","doi":"10.15547/ast.2023.01.010","DOIUrl":"https://doi.org/10.15547/ast.2023.01.010","url":null,"abstract":"Abstract. Restricted access to markets and complex rules remain a global barrier to growing small enterprises. A randomized sample of 200 farmers were carefully selected for the study. The study assessed farmers methods of linking to markets in Mbombela South Africa and analyse the determinants of engaging in specific types of markets. Structured and semi-structured questionnaires divided into sections were applied. The descriptive statistics and logistic regression methods were used for data analysis. The results showed that majority of smallholder farmers used informal markets and linkage to market information is through cell phone. Some of the major challenges farmers faced when accessing markets were transportation and inadequate market information. The empirical results of the study showed that the variables that positively influenced the choice of specific types of markets by farmers were gender (P<0.030), age (P<0.007), distance to markets (P<0.057), easiness of accessing markets (P<0.007), challenges with accessing markets (P<0.042) and access to extension services (P<0.003). The study concluded that the smallholder farmers in the Mbombela Local Municipality have difficulties in accessing formal markets and rely on informal markets to sell their farm products. The study recommended that farmers should be trained on the use of social media channels in accessing agricultural markets. Government should support to improve infrastructures like roads to assist farmers in accessing market. The study concluded that transport costs should be managed through shared and collective transportation arrangement with other farmers to convey farm produce to the markets for sale.","PeriodicalId":55762,"journal":{"name":"Agricultural Science and Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49259924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.15547/10.15547/ast.2023.01.001
N. Tsenov, T. Gubatov, I. Yanchev
Abstract. The aim of the study was to assess the size and stability of grain yield of a group of varieties grown in different conditions of the country. The study included a total of forty samples of winter common wheat, developed by Agronom breeding company. The field experiment was conducted in three typical grain production locations of the country: Dobrich, Trastenik and Straldja, in the period 2017-2019. All aspects of the interaction of varieties with environmental conditions were analyzed using two statistical programs PBSTAT and GEA-R. Through their application, 16 different parameters were calculated, through the ranks of which stability was assessed. The data obtained from the individual parameters were subjected to direct comparison with the modules of the programs GenStat 15, JMP 14 and GGE Biplot 6.3, which have a visual representation of the results for the level of yield and stability of each cultivar. The stability of only the varieties with higher yield than the check cultivar was monitored. Their stability was monitored and measured through all software products before a conclusion was made about its level. The share of genotype and its interaction with environment was only about 20% of the total variation. The conditions in the individual locations have a significant impact on the yield performance, which causes a strong change in the yield in the individual varieties. It causes a drastic change in the rank of the yield by locations. Against the background of strong G x E interaction, only six varieties have been identified: ABC Aldo, ABC Grosso, ABC Lombardya, ABC Klausius, ABC Zigmund and ABC Navo, whose average yields were proven to be higher than those of the check variety LG Avenue. Their high productive potential was realized to a degree that guarantees high stability in changing conditions of the used regions. Current statistical models were effective in quickly and efficiently determining all possible levels of combination between genotype yield and stability. The newly created varieties showed higher stability than the already established ones, as their productivity was at a much higher level. Breeding, accompanied by ecological tests of many advanced lines, shows that it was possible to combine high yields with relatively high stability with enough varieties for successful zoning throughout the country.
{"title":"Evaluation of grain yield and its stability of common wheat varieties in various environmental conditions","authors":"N. Tsenov, T. Gubatov, I. Yanchev","doi":"10.15547/10.15547/ast.2023.01.001","DOIUrl":"https://doi.org/10.15547/10.15547/ast.2023.01.001","url":null,"abstract":"Abstract. The aim of the study was to assess the size and stability of grain yield of a group of varieties grown in different conditions of the country. The study included a total of forty samples of winter common wheat, developed by Agronom breeding company. The field experiment was conducted in three typical grain production locations of the country: Dobrich, Trastenik and Straldja, in the period 2017-2019. All aspects of the interaction of varieties with environmental conditions were analyzed using two statistical programs PBSTAT and GEA-R. Through their application, 16 different parameters were calculated, through the ranks of which stability was assessed. The data obtained from the individual parameters were subjected to direct comparison with the modules of the programs GenStat 15, JMP 14 and GGE Biplot 6.3, which have a visual representation of the results for the level of yield and stability of each cultivar. The stability of only the varieties with higher yield than the check cultivar was monitored. Their stability was monitored and measured through all software products before a conclusion was made about its level. The share of genotype and its interaction with environment was only about 20% of the total variation. The conditions in the individual locations have a significant impact on the yield performance, which causes a strong change in the yield in the individual varieties. It causes a drastic change in the rank of the yield by locations. Against the background of strong G x E interaction, only six varieties have been identified: ABC Aldo, ABC Grosso, ABC Lombardya, ABC Klausius, ABC Zigmund and ABC Navo, whose average yields were proven to be higher than those of the check variety LG Avenue. Their high productive potential was realized to a degree that guarantees high stability in changing conditions of the used regions. Current statistical models were effective in quickly and efficiently determining all possible levels of combination between genotype yield and stability. The newly created varieties showed higher stability than the already established ones, as their productivity was at a much higher level. Breeding, accompanied by ecological tests of many advanced lines, shows that it was possible to combine high yields with relatively high stability with enough varieties for successful zoning throughout the country.","PeriodicalId":55762,"journal":{"name":"Agricultural Science and Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46390992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.15547/ast.2023.01.006
I. Petrova, S. Ivanova, S. Stoyanova, R. Mincheva, M. Pavlova
Abstract. For two consecutive economic years, a field experiment was conducted with spring rapeseed hybrid Rasna. The aim is to trace the effect of phytostimulant treatment on the total fat content of rapeseed and the proportion of essential fatty acids. The application of biostimulants (organic acid and humic complexes) in the cultivation of rapeseed variety Rasna leads to changes in the fatty acid composition of the seeds. The use of biostimulants HL100, HLN 55 and TH1-20% in the first year leads to a decrease in the content of saturated by 3.5%, 1.74% and 4.7% and polyunsaturated fatty acids by 2.74%, 0.59% and 3.15% due to the higher content of monounsaturated fatty acids by 0.99%, 0.58 and 1.47%. Biostimulator TH1-10% leads to an increase in saturated by 0.06%, monounsaturated by 0.26% and a decrease in polyunsaturated fatty acids by 1.35% compared to the control group of seeds. In the second year of treatment of rapeseed variety Rasna saturated fatty acids decreased compared to the control group to a lesser extent: with the application of biostimulant TH1-10% and HLN 55 by 0.33% and 0.11%, while with biostimulants HL 100, TH1-20% and H40 their content increases by 0.97, 0.06% and 0.04% respectively. Monounsaturated fatty acids decreased in humic complexes by 0.34%, biostimulator TH1-10% by 0.72% and biostimulator TH1-20% by 0.23%. Polyunsaturated fatty acids have the highest degree of reduction when applying biostimulant HL 100-2.77%. Saturated and polyunsaturated fatty acids had a higher content in the first year of treatment in rapeseed hybrid Rasna, while the concentration of monounsaturated fatty acids increased with a high degree of confidence (P≤0.001) in the second marketing year. This, on the one hand, is due to environmental factors, and on the other – to the type of preparation for treatment. The improved fatty acid composition of the seeds makes them a suitable raw material for the production of fats and their use in feed for monogastric and ruminant animals
{"title":"Influence of biostimulants and humic extracts treatment on the fatty acid profile of the spring oilseed rape variety","authors":"I. Petrova, S. Ivanova, S. Stoyanova, R. Mincheva, M. Pavlova","doi":"10.15547/ast.2023.01.006","DOIUrl":"https://doi.org/10.15547/ast.2023.01.006","url":null,"abstract":"Abstract. For two consecutive economic years, a field experiment was conducted with spring rapeseed hybrid Rasna. The aim is to trace the effect of phytostimulant treatment on the total fat content of rapeseed and the proportion of essential fatty acids. The application of biostimulants (organic acid and humic complexes) in the cultivation of rapeseed variety Rasna leads to changes in the fatty acid composition of the seeds. The use of biostimulants HL100, HLN 55 and TH1-20% in the first year leads to a decrease in the content of saturated by 3.5%, 1.74% and 4.7% and polyunsaturated fatty acids by 2.74%, 0.59% and 3.15% due to the higher content of monounsaturated fatty acids by 0.99%, 0.58 and 1.47%. Biostimulator TH1-10% leads to an increase in saturated by 0.06%, monounsaturated by 0.26% and a decrease in polyunsaturated fatty acids by 1.35% compared to the control group of seeds. In the second year of treatment of rapeseed variety Rasna saturated fatty acids decreased compared to the control group to a lesser extent: with the application of biostimulant TH1-10% and HLN 55 by 0.33% and 0.11%, while with biostimulants HL 100, TH1-20% and H40 their content increases by 0.97, 0.06% and 0.04% respectively. Monounsaturated fatty acids decreased in humic complexes by 0.34%, biostimulator TH1-10% by 0.72% and biostimulator TH1-20% by 0.23%. Polyunsaturated fatty acids have the highest degree of reduction when applying biostimulant HL 100-2.77%. Saturated and polyunsaturated fatty acids had a higher content in the first year of treatment in rapeseed hybrid Rasna, while the concentration of monounsaturated fatty acids increased with a high degree of confidence (P≤0.001) in the second marketing year. This, on the one hand, is due to environmental factors, and on the other – to the type of preparation for treatment. The improved fatty acid composition of the seeds makes them a suitable raw material for the production of fats and their use in feed for monogastric and ruminant animals","PeriodicalId":55762,"journal":{"name":"Agricultural Science and Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46630481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.15547/ast.2023.01.003
V. Badzhelova
Abstract. The potential for callus induction in the local population of Rosa damascena and Rosa alba was studied, and the influence of the different compositions of the main nutrient media and the hormones added to them was established. The results show that the induction and proliferation of callus mass are highly dependent on both the type of nutrient medium and the genotype. The highest total number of responding explants was obtained in Rosa alba, respectively 423 of 720 pre-placed and the highest percentage of explants that formed callus in both genotypes were reported on nutrient medium A24 - from 95% in Rosa damascena to 100% in Rosa alba.
{"title":"Comparison of in vitro callus induction between Rosa damascena and Rosa alba","authors":"V. Badzhelova","doi":"10.15547/ast.2023.01.003","DOIUrl":"https://doi.org/10.15547/ast.2023.01.003","url":null,"abstract":"Abstract. The potential for callus induction in the local population of Rosa damascena and Rosa alba was studied, and the influence of the different compositions of the main nutrient media and the hormones added to them was established. The results show that the induction and proliferation of callus mass are highly dependent on both the type of nutrient medium and the genotype. The highest total number of responding explants was obtained in Rosa alba, respectively 423 of 720 pre-placed and the highest percentage of explants that formed callus in both genotypes were reported on nutrient medium A24 - from 95% in Rosa damascena to 100% in Rosa alba.","PeriodicalId":55762,"journal":{"name":"Agricultural Science and Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44726756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.15547/10.15547/ast.2023.01.002
Z. Moussafir, A. Ben Moula, L. Allai, A. Ouamani, B. Nasser, K. Rakib, A. Essamadi, B. El Amiri
Abstract. This study aimed to evaluate the biochemical parameters of Boujaâd sheep under Moroccan semi-arid conditions during pregnancy and postpartum stages in pregnant (P) ewes compared to non-pregnant ewes (NP). Blood samples were collected from 24 healthy Boujaâd ewes (59 ± 4.2 kg) enrolled in the current study. From (1 to 30 days), these samples were collected daily; from day 30 onwards, they were gathered at three-day intervals. Blood samples were taken from the jugular vein to be analyzed for glucose, cholesterol, total protein, creatinine, urea, and triglycerides. In the present study, no significant difference was observed before synchronization in all parameter studies between pregnant ewes (P) and non-pregnant ewes (NP) (P>0.05). The results showed the lowest glucose level in pregnant ewes during all pregnancy stages, while total proteins, urea, and triglycerides showed the opposite trend. During early pregnancy (18-30 days), the cholesterol levels were lower in P compared with NP ewes, whereas no difference was found from 30 days to parturition. Creatinine was higher in pregnant ewes during early pregnancy (18-30 days). In comparison, there was no statistically significant (P>0.05) variation in creatinine levels between the P and NP ewes after 30 days of gestation. To conclude, marked changes accompanied specific biochemical parameters. The biochemical parameter indicating a clear difference is triglycerides, which may indicate an early pregnancy diagnosis in sheep considering the exact day of mating or artificial insemination in animals.
{"title":"Dynamics of some blood biochemical parameters in Boujaâd ewes from early to late gestation and the possibility of early pregnancy diagnosis","authors":"Z. Moussafir, A. Ben Moula, L. Allai, A. Ouamani, B. Nasser, K. Rakib, A. Essamadi, B. El Amiri","doi":"10.15547/10.15547/ast.2023.01.002","DOIUrl":"https://doi.org/10.15547/10.15547/ast.2023.01.002","url":null,"abstract":"Abstract. This study aimed to evaluate the biochemical parameters of Boujaâd sheep under Moroccan semi-arid conditions during pregnancy and postpartum stages in pregnant (P) ewes compared to non-pregnant ewes (NP). Blood samples were collected from 24 healthy Boujaâd ewes (59 ± 4.2 kg) enrolled in the current study. From (1 to 30 days), these samples were collected daily; from day 30 onwards, they were gathered at three-day intervals. Blood samples were taken from the jugular vein to be analyzed for glucose, cholesterol, total protein, creatinine, urea, and triglycerides. In the present study, no significant difference was observed before synchronization in all parameter studies between pregnant ewes (P) and non-pregnant ewes (NP) (P>0.05). The results showed the lowest glucose level in pregnant ewes during all pregnancy stages, while total proteins, urea, and triglycerides showed the opposite trend. During early pregnancy (18-30 days), the cholesterol levels were lower in P compared with NP ewes, whereas no difference was found from 30 days to parturition. Creatinine was higher in pregnant ewes during early pregnancy (18-30 days). In comparison, there was no statistically significant (P>0.05) variation in creatinine levels between the P and NP ewes after 30 days of gestation. To conclude, marked changes accompanied specific biochemical parameters. The biochemical parameter indicating a clear difference is triglycerides, which may indicate an early pregnancy diagnosis in sheep considering the exact day of mating or artificial insemination in animals.","PeriodicalId":55762,"journal":{"name":"Agricultural Science and Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42380048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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