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Hemp (Cannabis sativa L.) species belongs to the Hemp family (Cannabaceae), Cannabis genus. Hemp is considered as a species easily adapting to the changing environment conditions. It is characterized by plentiful of forms showing considerable biological and morphological differences and different economical value. Development of such big differentiation took place under the effect of geographical, climatic and soil conditions as well as human activity which aimed at developing and stabilizing important qualities of hemp. The collection of hemp genus held at the Institute of Natural Fibres in Poznań contains about 150 accessions. The collection holds both mono- and dioecious forms of hemp from zones represented by different soil and climatic conditions, local ecotypes and breeding lines with stabilized genotype that are exceptional in respect of one parameter, for instance Δ9THC, yield, quality of fiber, composition of fatty acids, etc. In 2000, the INF genetic resources were transferred to new facilities providing excellent conditions of storage. The long-term storage of seeds requires low air temperature, low seed moisture content (7–8%) and proper relative air humidity (below 55%). The air-dried seeds (7% of moisture content) are packed hermetically in a thermo-sealed aluminum foil and sent to core collection stored in a chamber at +4.0o C or to reserve bank where the 5-g samples are stored for a long time.
Subject and purpose of work: The aim of this work is to present the possibilities of cultivating varieties of industrial hemp which are registered in Poland in areas of high nature value. Materials and methods: This work is a type of overview; it describes characteristic features of areas of high nature value. It also presents specific biological properties, cultivation and agrotechnical requirements, as well as the versatility of industrial hemp usage. Results: This study demonstrated considerable importance of industrial hemp in developing areas of high nature value, in accordance with the idea of sustainable development. Conclusions: Due to the specific biological properties of industrial hemp, its low cultivation and agrotechnical requirements and lack of the need to use pesticides, industrial hemp can be successfully grown in areas of high nature value.
In recent years we are witnesses of the growth of interest in agriculture, industry and environmental movements in reproducible plant materials, including fibrous hemp – a plant attractive both to the agriculture and many industries. In addition to traditional textile use, the use of hemp found, inter alia, in the paper industry, construction materials, automotive, energy, cosmetics, pharmaceutical and chemical industries. Also in Poland, after the crisis, the growth of interest in hemp is demonstrated by the increase in area from 100 ha in 2003 to more than 1,600 ha in 2008. In Poland, work with hemp breeding started in 1946. At that time, the content of crude fiber in straw was only 14.3%. As a result of the multi-breeding work out this contents grew to 25–30%. The first the Polish monoecious hemp variety, entered in 1968 in the Register of Varieties is Białobrzeskie. This variety of high economic value has successfully grown to this days not only in Poland, but also in the European Union. At present, in the National Register of COBORU there are five varieties of monoecious hemp grown in INF&MP: Białobrzeskie, Beniko, Silesia, Tygra and Wielkopolskie. These are varieties adapted to Polish climate and soil conditions. When applied for proper growing conditions, they ensure high and stable yields. In accordance with the requirements of the Drugs Act of 29 July 2005, which regulates the cultivation of hemp in Poland, all Polish varieties and breeding prospective families contain less than 0.2% of hallucinogens. Growing hemp does not require, as a rule, use of plant chemical protection, provides high yields, leaving the soil in a very good structure. The new varieties, technologies and cultivation of cannabis harvest to total mechanization and obtain the raw material for specific technological parameters, caused the hemp plant has become attractive for both agriculture and industry.
Subject and purpose of work: The raw materials which are the purpose of the current hemp cultivation (<0.2% THC) are fibre, seeds and shives. This study describes the characteristics the raw materials obtained from the industrial hemp and described in detail the possibilities of their applications in pulp and paper, textile, pharmaceutical, construction and food industries. Analysis of the issues: Hemp straw consists of a porous ligneous core, which may be cut into smaller pieces, called hemp shives and of the fibre around the core. Hemp cellulose is used to produce paper pulp or plastics. In the construction sector, hemp fibre is used to produce, among other things, thermal insulation materials. Hemp shives is used as a filler for a composite based on lime binder, which is used as a wall material with good hygrothermal conditions confirmed by proprietary research. Hemp seeds are used for the production of cooking oil. Hempseed oil is also used in the pharmaceutical industry, e.g. to produce skin creams. Conclusions: Raw materials obtained from industrial hemp have a variety of applications. Currently, new directions in hemp application are being sought and tested, like for example hemp lime composite and bio-composites. The positive environmental impact resulting from the cultivation of hemp should be the main reason for simplifying the procedures for the commencement of its cultivation in many countries, e.g. in Poland.
This article presents the results of the studies carried out among the farmers from Wielkopolska Province as regards their willingness to cultivate fibre rops and medicinal plants. It describes the role of these plants in the production structure of farms as well as the economic situation on the flax, hemp, and medicinal plant markets. Then, the major factors for the introduction of these species to production in terms of the Polish agriculture are demonstrated. The summary includes the application conclusions for the economic policy regarding the producers and the processors of fibre crops and medicinal plants.
The European Union’s actions aim to achieve aa more dynamic development and use of renewable raw materials for bio-economy produced, among others, by the agricultural sector. Such actions will allow for the rapid development of the area of the bioeconomy. They can all be reached by conducting innovative research and implementing its outcome into industrial practice. Innovative research for the development of the bioeconomy is performed by the Institute of Natural Fibres and Medicinal Plants. The paper presents and discusses the research projects carried out by the Institute on allowing the production and use of reproducible raw materials such as flax, hemp and herbal plants in various areas of the bio-economy (textiles, construction, automotive, paper industry, pharmaceutical industry, cosmetic, etc.).
The aim of our research was to estimate the efficiency of monoaecian fibrous hemp (Cannabis sativa L., "Benico" variety) for heavy metals phytoextraction from soil-sludge substratum during anaerobic sew­age sludge management in non-industrial sites. Below are the results from a pot experiment with hemp as a plant which phytoextracts zinc, copper and nickel. On the basis of heavy metals analysis in substratum it was ascertained that an increase of hemp biomass caused thirtyfold reduction of zinc, thirty-fivefold reduc­tion of copper and tenfold reduction of nickel in light soil of sewage sludge fertilized in comparison with their concentration at the beginning of the pot experiment.
The effects of different combinations of plant growth regulators (PGRs) on callus induction and plant regeneration were investigated in five cultivars of Cannabis sativa L. Callus was induced from different explant sources (young leaves, petioles, internodes, axillary buds) on MS basal medium with various concentrations of PGRs (2,4-D, DICAMBA, KIN, NAA). The highest frequency of callus induction (avg. 82.7% of eight medium combinations) was exhibited by petiole explants of cv. Fibrimon-24. Plant regeneration was obtained from all studied cultivars. The highest number of plants was regenerated from callus tissue of petiole explants on MS medium containing DICAMBA. A total of 46 plants (1.35% of callus) were regenerated: 16 (0.47%) from cv. Silesia petioles, 7 (0.20%) from cv. Novosadska petioles, 6 (0.18%) from cv. Fedrina-74 petioles, 12 (0.35%) from cv. Fibrimon-24 axillary buds, and 5 (0.15%) from cv. Juso 15 internodes. Significant improvement of hemp plant regeneration in vitro was achieved.
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