Phase change materials (PCMs) are now widely known as potential additives for building insulation to provide a thermal mass effect that helps conserve energy and maintain comfortable indoor temperature. Therefore, the study presented in this paper focuses on an experimental investigation of specific heat capacity conductivity hemp shive mixed with PCMs. Industrially manufactured organic PCM-S50 received from MikroCaps Ltd. (Slovenia) has been used further enhance respective properties...

In recent decades, the demand for flax and hemp fibers annually renewable biodegradable sources of raw materials is increasing rapidly due to new applications innovative materials. Cellulose most valuable component bast fibres with a wide application range. Relative content crystalline cellulose influences mechanical properties fibres. Content structural composition lignin determines how severe technologies could be applied separate from matrix. The paper examines fiber structure chemical...

Fungal diseases are one of the limiting factors flax (Linum usitatissimum L.) production in variable environmental conditions.The expansion fungal depends on plant resistance, pathogen population's ability to overcome this resistance and growth conditions.This study is aimed estimate relation under field conditions identify most promising accessions for breeding.A total 24 fibre genotypes local origin were investigated.The with different common identified using area disease progress curve...

<p class="R-AbstractKeywords"><span lang="EN-US">Energy and raw material costs, an increase in environmental pollution, greenhouse gas emissions, global warming, depletion of fossil materials stimulate to seek study alternatives the synthetic fibers products made them for full or partial replacement. Renewable materials, including natural fiber sources, are future storage resources with a variety positive effects on both planet ecosystem living working environment, energy...

Flax is the multiple purpose crop cultivated in temperate region. Seeds of oil flax recently became important constituent for many industrial applications, such as pharmacy, medicine, food production <em>etc.</em> and have high prospective use Latvia. Understanding underlying processes that limit seed yield major with respect to enhancing breeding improvements. The aim study was evaluated 29 varieties lines (including 20 Latvian origins) plasticity changeable environmental...

The aim of the present study was to evaluate nitrogen fertilizer impact on photosynthesis and yield hemp, applying modern non-destructive methods. main object investigation – hemp cultivar Latvian origin ‘Pūriņi’. Laboratory field experiments showed diverse effects different doses various parameters. Additional dose 60 kg ha-1 is most effective as evaluated by chlorophyll content in leaves changes a fluorescence Nitrogen negatively affected fiber stems, therefore while cultivating only for...

Each year more and people focus on healthy, ecological environmental-friendly living. Environmentally friendly lifestyle doesn’t mean that we are using only natural products, but attention is pointed to the manufacturing production process also. The rapid development of recycled biodegradable products causes expanding usage hemp fibers both in household technical textiles. analysis cultivation trends world Europe shows processing Latvia has good perspectives. Product quality influenced by...

Received: February 2nd, 2021 ; Accepted: August 3rd, Published: 7th, Correspondence: erika.teirumnieka@gmail.com

As the world shifts towards more sustainable and eco-friendly practices, industrial hemp (Cannabis sativa L.) is gaining recognition as a versatile crop with numerous applications. The Baltic Sea region well-suited for cultivation, its temperate climate varied soil types. This study evaluates suitability of various varieties region, focusing on their ability to produce high-quality biomass, fibers, seeds, dual-purpose products. findings will contribute development thriving industry in...

Flax (Linum usitatissimum L) yield of stem and seeds them quality is influenced by a number harmful diseases but investigation about pathogens in recent years have not been done Latvia. Each stage development disease important the pathogen life cycle requires certain condition. Goal this study identify possibilities were assess severity depending on genotypes flax variable environmental conditions. The resistance to for 24 standard variety ‘Vega 2’ evaluated. field trials carried out over...

Plant calli culture could be used as a source of genetic changes (somaclonal variation). There are known several flax varieties, bred on the basis somaclonal variation, with improved resistance to biotic and abiotic stresses, plant height, seed yield other traits. This method is useful for obtaining new initial material breeding, including intensification breeding organic farming. Goal study was obtain plants-regenerants from fibre variety ‘Vega 2’ evaluate their agronomical traits powdery...

Flax breeding is a long and complicated process based on hybridization following selection of the best plants. Because possible occasional cross-pollination development genetically stable homozygous lines could last more than 15 years. For rapid creating initial material for flax anther culture methods producing doubled haploid (DH) be used successfully. The goal this study was to develop protocol DH from hybrids included in Latvian programme do preliminary field evaluation obtained lines....

Varieties grown for fibre-only will be established, managed and harvested differently than varieties seeds or dual-purpose. The aim was analysed yield productivity length of vegetation period dependency the two types hemp variety identified perspective highest under different meteorological conditions in Latvia. Varieties/line from diverse European Latvian origin (seed varieties/ line 'Adzelvieši', 'Pūriņi', KA-2-2011, 'Finola', 'Henola' fibre 'USO 31', 'Futura 75', 'Austa') were sown...

Hemp, Cannabis sativa is certainly a mul­tifunctional as well niche crop, due to great po­ten­tial for innovative use of its different products. Aspects hemp mineral nutrition are very important in the cultivation these plants, particular make cul­ti­vation environmentally friendly by replacing synthetic fertilizers with organic ones. Among fertilizers, vermicompost has gained attention within last decades. Explaining role vermicompost, this study evaluated effects doses fer­ti­lizer on...

Use of hemp fibre is rapidly increasing in Europe. This tendency related to carbon and glass substitution with recycled biodegradable raw materials for use car production. Scientists manufacturers work obtain new composite where will be as reinforcement. Hemp fibres are light high tensile strength comparing other technical fibres. Advantage – eco–friendly utilization possibilities. The research determine efficiency was carried out two years at the Latgale Agricultural Research Centre. In...

‘Camelina sativa’ is one of the oldest oil crops in Europe. Growing areas were reduced dramatically 20-40-ties last century. Low price rape and unclear composition camelina primary reasons this process. Nevertheless, years sativa' attracted a great interest scientists processors as crop for diversification agriculture and, same time, producing high quantity quality biofuel, feeding, food, pharmacy (source a-linolenic acid, linoleic acid vitamins, especially E). In Latvia spread wild form but...