https://repository.utm.md/handle/5014/8302 2026-10-25T03:18:29Z https://repository.utm.md/handle/5014/37585 Analiza ecologică a speciei Celtis occidentalis L. pe teritoriul Republicii Moldova NOVAC, Gheorghe Celtis occidentalis L. is a promising species for increasing the stability and longevity of forest plantations in the Republic of Moldova. The forests under study are scattered in the eastern and south-eastern part of the Republic of Moldova, consisting of the territory of the forestry park: Anenii Noi, Causeni, Criuleni, Harbovat, Olanesti, and Bacioi township, which total an area of 1152.9 ha from 321 management units. The aim of this work was to identify the ecological conditions in the Republic of Moldova in which the common hackberry grows and the basis for measures to enrich the assortment of species for the resilience of the forest floor to climate change. The objectives of the research were to obtain an assessment as close as possible to reality of the common hackberry resources as well as the distribution of this species on the territory of the Republic of Moldova, by means of data collected during the field phase and from forest-based amenity. The average mass of 100 ripened common hackberry fruit was 28.65 g and the same number of seeds weighed 13.49 g. The average fruit diameter was 7.47 mm and 5.21 mm for seeds. 2024-01-01T00:00:00Z https://repository.utm.md/handle/5014/37469 Some seeds characteristic and biomass quality of some Brassicaceae and Fabaceae species in Moldova ABABII, Alexei; CEREMPEI, Valerian; ŢIŢEI, Victor; GUŢU, Ana; CÎRLIG, Natalia; GADIBADI, Mihail; MARDARI, Liliana; DOROFTEI, Veaceslav; COZARI, Sergiu; ANDREOIU, Andreea Cristina; GARȘTEA, Nina; MAZĂRE, Veaceslav The goal of our research was to fulfil the potential of traditional, underutilized and less known plant species of the families Brassicaceae and Fabaceae, which grow in the experimental plots of the “Alexandru Ciubotaru” National Botanical Garden (Institute), Chisinau, Republic of Moldova. The seeds and biomass of these plant species have high potential for use as food, forage and raw material for circular economy, including bioenergy production. The determination of physical and mechanical properties of seeds and agricultural products is important in the design of harvesting, handling and processing equipment. Our research revealed that the characteristic dimensions of seeds of the studied Brassicaceae species varied in the following ranges ℓ: b: δ ≈ (1.98-12.60): (1.67-3.67): (1.63-2.05) mm; the angle of repose 𝛼=24.6°-30.6° and the flow angle on steel is 𝛼1 =15.8°-31.7°, on wood 𝛼1=18.1°-37.3° and on enamelled surface 𝛼1=15.3°-30.5°; M1000 = 4.30-9.73 g and bulk seed density 88.3-766.9 kg/m3. The seeds characteristic of the studied Fabaceae species was ℓ: b: δ ≈ (1.53-8.00): (1.20-5.47): (1.47-5.01) mm; the angle of repose 𝛼=21.5°-33.0°, flow angle on steel is 𝛼1 =14.3°-27.7°, on wood 𝛼1=14.7°-29.8° and on enamelled surface 𝛼1 =14.2°-27.3°; M1000 = 1.35-170.04 g and bulk seed density 370.8-830.0 kg/m3. The harvested green mass from studied Brassicaceae species is characterized by 16.1-23.5%CP, 63.2-69.9% DMD, RFV=117-162, 10.21-11.20 MJ/kg ME, 5.18-6.76 MJ/kg NEl and from Fabaceae species 14.2-23.4% CP, 58.4-69.5% DMD, RFV=91-168, 9.51-11.15 MJ/kg ME, 5.53-7.17 MJ/kg NEl. The biochemical biomethane potential from vegetal substrates is 305-379 L/kg of organic matter. 2023-01-01T00:00:00Z https://repository.utm.md/handle/5014/37345 The evaluation of the biomass quality of Spartina pectinata and prospects of its use in Moldova COZARI, Sergiu; ŢIŢEI, Victor; ABABII, Alexei; GUŢU, Ana; CÎRLIG, Natalia; ANDREOIU, Andreea Cristina; BLAJ, Adrian Vasile; MAZĂRE, Veaceslav; LÎSÎI, Radu; COVALCIUC, Dragoș; CEREMPEI, Valerian Prairie cordgrass - Spartina pectinata Bosc ex Link, Poaceae family, is a warm-season, C4 perennial rhizome grass native to North America. The main objective of this research was to evaluate the quality indices of green and ensiled mass substrate, solid dry biomass of the introduced taxa of Spartina pectinata, grown in monoculture in the collections of the National Botanical Garden (Institute), Chişinău. It was established that Spartina pectinata fresh mass substrate used for anaerobic digestion contained 43 g/kg CP, 66 g/kg ash, 437 g/kg Cel, 301g/kg HC, 59 g/kg ADL, 55 g/kg TSS, with C/N = 74 and biochemical methane potential 299 l/kg, but the ensiled substrate - 44 g/kg CP, 76 g/kg ash, 473 g/kg Cel, 323 g/kg HC, 57 g/kg ADL, with C/N = 72 and biochemical methane potential 303 l/kg, respectively. It has been determined that prairie cordgrass solid dry biomass harvested in winter period contained 453 g/kg Cel, 294 g/kg HC, 82 g/kg ADL, the estimated theoretical ethanol yield averaged 543 L/t. The prepared solid fuel, briquettes and pellets, had significantly higher net calorific value than perennial sorghum and corn stem fuel. The investigated introduced taxa of prairie cordgrass, may be used as multi-purpose feedstock for renewable energy production in Moldova. 2023-01-01T00:00:00Z https://repository.utm.md/handle/5014/37339 Trends in the development of conservation / ecological agriculture in the context of current climate change - a review VLĂDUȚ, Nicolae Valentin; ATANASOV, Atanas; UNGUREANU, Nicoleta; IVAȘCU, Larisa Victoria; CIOCA, Lucian Ionel; POPA, Lorena Diana; MATEI, Gheorghe; BORUZ, Sorin; CEREMPEI, Valerian; ȚÎȚEI, Victor; NENCIU, Florin; MILEA, Oana-Elena; DUMITRU, Ştefan; CABA, Ioan In the context of severe climate change over the past 20 years, which has led to reduced rainfall and reduced crop yields, identifying solutions to meet these challenges has become a priority for agricultural researchers. Thus, conservation and ecological, organic farming practices have emerged, which can mitigate and even improve crop productivity, even in these harsh conditions for agriculture. This paper is a synthesis of 433 papers published worldwide (Europe, North America, South America, Africa, Asia and Australia) and analyzes how conservation and organic farming practices have influenced the increase in soil quality and health through: no-tillage, covering land with agricultural residues, crop rotation etc.; În condițiile schimbărilor climatice accentuate din ultimii 20 ani, care au condus la reducerea precipitațiilor şi scăderea randamentului culturilor, identificarea unor soluții care să răspundă acestor provocări a devenit o prioritate pentru cercetătorii din domeniul agricol. Astfel, au apărut practicile agriculturii conservative şi ecologice, organice, care pot atenua şi chiar îmbunătăți productivitatea culturilor, chiar în aceste condiții vitrege pentru agricultură. Această lucrare reprezintă o sinteză a 433 lucrări publicate în întreaga lume (Europa, America de Nord, America de Sud, Africa, Asia şi Australia) şi analizează modul în care practicile agriculturii conservative şi ecologice au influențat creșterea calității şi sănătății solului prin: lucrări no-tillage, acoperirea terenurilor cu reziduuri din agricultură, rotația culturilor etc. 2024-01-01T00:00:00Z