Journal of Central European Agriculture最新文献_第4页

Research of the process of air separation of grain material in a vertical zigzag channel 垂直之字形通道中颗粒物料空分过程的研究

IF 0.7

Journal of Central European Agriculture Pub Date : 2023-01-01 DOI: 10.5513/jcea01/24.1.3732

S. Stepanenko, B. Kotov, Alvian Kuzmych, R. Kalinichenko, V. Hryshchenko

{"title":"Research of the process of air separation of grain material in a vertical zigzag channel","authors":"S. Stepanenko, B. Kotov, Alvian Kuzmych, R. Kalinichenko, V. Hryshchenko","doi":"10.5513/jcea01/24.1.3732","DOIUrl":"https://doi.org/10.5513/jcea01/24.1.3732","url":null,"abstract":"The aim of the research is to determine ways to improve the efficiency of grain materials pneumatic separation based on the study of the interaction mechanism of grains with the air flow in the channel elements, which are inclined sections of the air duct. The paper considers a modified separation method that separates the grain material according to the aerodynamic properties of the components in a vertical zigzag air channel in an aerodynamic and gravitational field. The studies were carried out by means of mathematical modeling followed by experimental confirmation of the modeling results. A computer mathematical model was created in the MathCad 13 application package to determine the parameters of the zigzag aspiration channel. This model describes the influx of parameters in the channel (width, height, cut of the zigzag ledge to the horizon, edge of the zigzag ledge) on the nature of the grain trajectory. As a result of the numerical simulation process using the mathematical package Mathematica, dependence was obtained to determine the trajectory of motion depending on the angular velocity. An increase in the pneumatic separation effect during the grain mixtures division due to the influence of the Magnus effect was established as a result of experimental studies. The design of a zigzag separator with an annular channel section has been improved based of the research carried out.","PeriodicalId":51685,"journal":{"name":"Journal of Central European Agriculture","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70972798","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}

引用次数: 1

The effect of different types of mulch and different cultivation methods on the quantitative and qualitative traits of sunflower (Helianthus annuus L.) in Ahvaz climate 不同覆盖类型和不同栽培方法对阿瓦士气候下向日葵数量和质量性状的影响

IF 0.7

Journal of Central European Agriculture Pub Date : 2023-01-01 DOI: 10.5513/jcea01/24.1.3499

Rezvan Kazemi Hasanvand, Amin Lotfi Jalal-abadi, Alireza Abdali Mashhadi, Ahmad Kochekzadeh, Abdolreza Siyahpoosh

引用次数: 1

Analyzing the effects of potassium fertilization on the yield and total N, K2O and P2O5 export of tomato plants 分析施钾对番茄产量及全氮、K2O和P2O5输出量的影响

IF 0.7

Journal of Central European Agriculture Pub Date : 2023-01-01 DOI: 10.5513/jcea01/24.1.3744

V. Vasileva, I. Mitova

{"title":"Analyzing the effects of potassium fertilization on the yield and total N, K2O and P2O5 export of tomato plants","authors":"V. Vasileva, I. Mitova","doi":"10.5513/jcea01/24.1.3744","DOIUrl":"https://doi.org/10.5513/jcea01/24.1.3744","url":null,"abstract":"The tomato ( Solanum lycopersicum ) is a crop that is characterized by considerable nutrient export because of its intensive growth, development, fruiting, and high biomass production. The purpose of this study is to determine how single-dose and split potassium fertilization impact the overall amount of nitrogen, potassium, and phosphorus exported from soils during crop harvest. A field experiment was carried out on Fluvosol (FAO, ISRIC World Soils) with K 2 O content of 20.3 mg/100g, P 2 O 5 content of 5.8 mg/100g, and mineral N of 19.6 mg/kg. It was found that the biological yield and N, P 2 О 5 and K 2 O nutrient export are significantly influenced by planting time and potassium fertilization treatments. Higher tomato fruit and biomass yields (61878.9 and 27184.9 kg/ha), along with higher nutrient export rates were observed in mid-early tomato plants. The highest yield and total N, K 2 O and P 2 O 5 export from the soil was measured at split potassium (К 80+80+80 ) fertilization treatment. A positive linear correlation between yield quantity and nutrient export was observed. The biological yield and nutrient export were shown to be significantly impacted by potassium fertilization ( P <0.05).","PeriodicalId":51685,"journal":{"name":"Journal of Central European Agriculture","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70973317","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}

引用次数: 1

Establishment of indigenous garlic varieties in vitro under influence of growth regulator and light 生长调节剂和光照条件下大蒜离体栽培品种的建立

IF 0.7

Journal of Central European Agriculture Pub Date : 2023-01-01 DOI: 10.5513/jcea01/24.2.3764

Monika Tkalec Kojić, Sunčica Kujundžić, N. Parađiković, Dejan Bošnjak, T. Vinković, B. Ravnjak, M. Stošić, S. Zeljković, T. Kujundžić

引用次数: 0

Biotechnological methods of selenium bioremediation from various compartments of environment: A review 不同环境中硒生物修复的生物技术方法综述

IF 0.7

Journal of Central European Agriculture Pub Date : 2023-01-01 DOI: 10.5513/jcea01/24.2.3879

Ž. Zgorelec, A. Vujnović, Andreja Prevendar Crnić, G. Medunić

{"title":"Biotechnological methods of selenium bioremediation from various compartments of environment: A review","authors":"Ž. Zgorelec, A. Vujnović, Andreja Prevendar Crnić, G. Medunić","doi":"10.5513/jcea01/24.2.3879","DOIUrl":"https://doi.org/10.5513/jcea01/24.2.3879","url":null,"abstract":"Selenium (Se) is an essential element for human health in trace amounts but is harmful in excess. Most plants contain a fairly low Se and crop Se supplements ensure adequate levels for human nutritional needs. Food is the primary source of Se for humans and due to differences in eating habits, its intake varies considerably. In the human body, selenium deficiency can lead to diseases of the endocrine, musculoskeletal, cardiovascular, reproductive, nervous and immune systems. Selenium is an important ingredient in glutathione peroxidase, the main cellular antioxidant enzyme, which can convert free radicals into peroxides, while vitamin E removes free radicals and neutralizes their potentially harmful effects. Excessive amounts of selenium in the human diet are considered toxic, causing liver and kidney damage, blood clotting, heart and liver necrosis, skin lesions, nausea, vomiting, and loss of hair and nails. Semiconducting properties of Se make it of special value for industry. Selenium is a rare element on the planet, and is a non-renewable resource due to its non-efficient and difficult recycling. Except of coal, which is commonly enriched in Se, there are no ores which could be mined for it. Herewith, the world's scarce Se resources need a careful management, monitoring, recycling, and stockpiling for future generations. The first part of this review outlines selenium concentrations in soil, water, and plants in terms of essential and toxicological effects on animals and humans, while the second part briefly overviews novel biotechnological methods of bioremediation of environmental selenium.","PeriodicalId":51685,"journal":{"name":"Journal of Central European Agriculture","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70974917","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}

引用次数: 0

Nectar secretion and honey production potential of Satsuma mandarin (Citrus unshiu Marc.) cultivars 蜜桔(Citrus unshiu Marc.)品种的花蜜分泌和产蜜潜力

Journal of Central European Agriculture Pub Date : 2023-01-01 DOI: 10.5513/jcea01/24.3.3868

Saša Prđun, Maja Dražić, Dragan Bubalo

引用次数: 0

Influence of co-inoculation of Bradyrhizobium japonicum and Pseudomonas fluorescens on growth of soybean (Glycine max L.) 缓生根瘤菌与荧光假单胞菌共接种对大豆生长的影响

Journal of Central European Agriculture Pub Date : 2023-01-01 DOI: 10.5513/jcea01/24.3.3878

Sanja Kajić, Bernarda Lenkert, Sanja Sikora, Ivana Rajnović

{"title":"Influence of co-inoculation of Bradyrhizobium japonicum and Pseudomonas fluorescens on growth of soybean (Glycine max L.)","authors":"Sanja Kajić, Bernarda Lenkert, Sanja Sikora, Ivana Rajnović","doi":"10.5513/jcea01/24.3.3878","DOIUrl":"https://doi.org/10.5513/jcea01/24.3.3878","url":null,"abstract":"Soybean (Glycine max L.) is a very important legume in the human diet as well as fodder crop. Previous studies have reported that co-inoculation with PGPR (plant growth-promoting bacteria) and rhizobia promotes symbiotic nitrogen fixation efficiency, increases plant nitrogen content and reduces the occurrence of soybean diseases, thus reducing pesticide use, and protecting the environment. The aim of this study was to determine the impact of co-inoculation of soybean seeds with different strains of nodule bacteria Bradyrhizobium japonicum as well as PGPR (Pseudomonas fluorescens). Indigenous strains of beneficial bacteria used in this research were isolated from different locations in Croatia. Isolates were identified by performing 16S rRNA gene sequencing. The application of different strains of nodule bacteria resulted in a statistically justified effect on all investigated properties, with the exception of root length. A positive influence of P. fluorescens on the increase in shoot dry weight was observed with the co-inoculation with the reference strain B. japonicum and two indigenous strains. The application of P. fluorescens did not show statistically justified differences in any of the investigated properties. Co-inoculation of nodules and PGPR bacteria is a very important biotechnological tool in agriculture, which is why research in this area should definitely be continued and expanded to a larger number of P. fluorescens strains.","PeriodicalId":51685,"journal":{"name":"Journal of Central European Agriculture","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135699204","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}

引用次数: 0

Performances of maize and soybean as influenced by intercropping and fertilizer sources in the Northern Guinea Savanna agro-ecology of Nigeria 尼日利亚北部几内亚稀树草原农业生态系统间作和肥料来源对玉米和大豆生产性能的影响

Journal of Central European Agriculture Pub Date : 2023-01-01 DOI: 10.5513/jcea01/24.3.3753

Richard Adeola, Tajudeen Akinrinola, Olajire Fagbola

引用次数: 0

Metabolism and utilisation of non-protein nitrogen compounds in ruminants: a review 反刍动物非蛋白氮化合物的代谢与利用研究进展

IF 0.7

Journal of Central European Agriculture Pub Date : 2023-01-01 DOI: 10.5513/jcea01/24.1.3645

D. Zurak, K. Kljak, J. Aladrović

{"title":"Metabolism and utilisation of non-protein nitrogen compounds in ruminants: a review","authors":"D. Zurak, K. Kljak, J. Aladrović","doi":"10.5513/jcea01/24.1.3645","DOIUrl":"https://doi.org/10.5513/jcea01/24.1.3645","url":null,"abstract":"Unique stomach physiology allows ruminants to utilise any form of dietary nitrogen (N) as a protein source. Ruminant N requirements can be divided into N requirements for microbial fermentation and host requirements for amino acids. Ruminant diets often contain non-protein nitrogen (NPN) compounds, a group of components that are not proteins but can be converted to proteins by rumen microbes. Therefore, NPN compounds in ruminant diets serve as alternative sources of ammoniacal nitrogen (NH 3 -N), which is necessary for the synthesis of microbial protein (MCP) in the rumen. MCP is an important component of metabolizable protein for ruminants and, under certain production conditions, may be the only amino acid source for synthesis of tissues and products. In this manner, ruminants utilise NPN compounds without having enzymes for their degradation. The use of NPN compounds in ruminant nutrition allows for an increase in feed consumption and utilisation, as well as the substitution of protein supplements, which in turn leads to more cost-effective production. However, abrupt supplementation or excessive consumption of NPN could negatively affect MCP synthesis, feed digestion, and animal production. On the other hand, it may lead to animal poisoning and the release of large amounts of N into the environment. Knowledge of N metabolism in the rumen, as well as optimization of its utilisation, sets the conditions for the presumed beneficial effects of NPN compounds in ruminant diets, without adverse effects on animal health and the environment. Therefore, the aim of this study was to summarize the recent literature data on the metabolism and utilisation of NPN compounds in ruminants","PeriodicalId":51685,"journal":{"name":"Journal of Central European Agriculture","volume":"64 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70972573","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}

引用次数: 0

Correlation and path analyses of the performance elements in spring barley cultivars 春大麦品种生产性能要素的相关及通径分析

IF 0.7

Journal of Central European Agriculture Pub Date : 2023-01-01 DOI: 10.5513/jcea01/24.2.3735

Natalia Vasko, P. Solonechnyi, O. Naumov, M. Kozachenko, L. Kobyzeva, O. Zymogliad

引用次数: 0