Ioan ROTAR

University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca

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Roxana Vidican

University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca

137

F. Păcurar

University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca

100

Vlad Stoian

University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca

Anamaria Mălinaş

University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca

Anca BOGDAN

University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca

Laura Dale

Landeswasserversorgung (Germany)

Anca PLEȘA

University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca

N. Gârda

University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca

Adriana Morea

University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca

L. Carlier

Research Institute for Fisheries and Aquaculture

Cooperative Institutions

University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca

University of Agricultural Sciences, Dharwad

"Ion Ionescu de la Brad" Iasi University of Life Sciences

Walloon Agricultural Research Centre

Centre for Agricultural Research

University of Freiburg

Univesity of Life Science "King Mihai I" from Timisoara

Gembloux Agro-Bio Tech

Technical University of Cluj-Napoca

Aberystwyth University

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The grasslands of the Apuseni Mountains, Romania

Katja Brinkmann F. Păcurar Ioan ROTAR Evelyn Ruşdea Eckhard Auch

The Apuseni Mountains possess a wide range of mountain grassland types that have a natural and aesthetic value. In this traditional cultural landscape, small-scale farming structure and a traditional system of land use exist. Landscapes change with the prevailing socio-economic and social framework conditions. An inter- and trans-disciplinary, project, known as 'Project Apuseni' studied the land use system, vegetation, landscape patterns and their actual changes within the process of societal transformation, and predicted the future outlook for the Apuseni Mountains, which are located in north-western Romania and cover an area of ca. 11,000 km. The actual state of species and landscape diversity is high in the whole area of the Apuseni Mountains and results from traditional and extensive management practices. Within the Project Apuseni, land use scenarios, the future alternatives for grassland management and the opportunities and risks in the context of nature conservation and agriculture were evaluated.Keywords: Apuseni mountains grassland; Romania; small-scale farming structure

10.1163/9789004278103_026

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Citations (5)

SUSTAINABLE DEVELOPMENT ELEMENTS IN TRADITIONAL MANAGEMENT OF ARNICA MONTANA GRASSLANDS

Hop and Medicinal Plants (1970)

F. Păcurar Ioan ROTAR N. Gârda

In the territory of Apuseni Mountains (Romania) it can be found large areas of grasslands, in which the species Arnica montana is frequent. The area of this species is decreasing in Europe all the time, so that its maintenance in the region’s habitats mentioned before is related to a traditional grassland management. By using the questionnaire method we have surveyed the factors that contribute to this species maintenance in the sward. We observed that the management of these meadows is an extensive one, being performed only few maintenance activities, like: rocks gathering, wooden vegetation fighting, fighting damages made by wild pigs and fertilization. Fertilization is done only with manure that comes from cows and horses. Most of the meadows are being used in a mixed way, mowing is performed at the beginning of August, when arnica species has already made seeds, and grazing is made only in the late autumn. Mowing on arnica areas is perfomed only manually, and grazing is practiced with cows and horses. The species’ maintenance in these habitats depends on a specific cultural landscape.

10.15835/hpm.v16i1-2.3063

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THE ORGANIC-MINERAL FERTILIZATION OF A FESTUCA RUBRA L. GRASSLAND FOR EIGHT YEARS

Lucrări Științifice, Universitatea de Stiinte Agricole Și Medicină Veterinară "Ion Ionescu de la Brad" Iași, Seria Agronomie (2010)

F. Păcurar Ioan ROTAR N. Gârda Adriana Morea

The organic-mineral fertilization could be a realistic method of management of the grasslands while a strong decreasing of animals number takes place in Romania. On the grasslands in Apuseni Mountains, this type is not being practiced, but it could be a chance to maintain the oligotrophic grasslands in the mountainous landscape. The combined and long effect of organic and mineral fertilizers upon the dry matter is rather known, but the influence upon the phyto-diversity is less studied. This papers’ objective is to survey the effect of organic and mineral fertilizers application upon the phyto-diversity of a meadow from the boreal floor. After an eight years period, the administration of mineral and organic fertilizers produces important changes at herbaceous canopy level, two floristic structures being distinguished: on the one side the witness’ one, and, on the other side, the floristic structure of the treated variants, noticing certain species characteristic to each type of management. The floristic structure of the treated variants is significantly correlated with the general cover, mineral and organic fertilization and with the fertilization length. The administration of technological inputs produces a considerable decrease of the phyto-diversity, especially in case of the variants treated with larger quantities of fertilizers.

Festuca rubra

Floristics

Herbaceous plant

Podzol

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Effects of nutritive quantities of tylosin for fattening pigs.

Jasna Stekar Ioan ROTAR M. Skerjanc

Tylosin

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The fixation of carbon dioxide: good for crop yield and good for the environment.

L. Carlier Ioan ROTAR Roxana Vidican

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Research on Protein Content and Total Nitrogen and a Cob of Maize Strains by FT-NIR Spectrometry

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Agriculture (1970)

Ioan ROTAR Laura Dale Roxana Vidican Alin Mogos Adrian CECLAN

Using Near Infrared Spectrometry has become lately quite a developed technique in the different physico-chemical parameters of the feed as a procedure is extremely elegant and precise use. This paper aims to highlight a way of direct analysis method undestructive protein and total nitrogen using near infrared spectrometry in conjunction with reflected attenuated total. Tests were conducted on samples of maize cob and maize stalks from The Research - Agricultural Development Turda. Samples done at each variant separately. Each sample was subjected to destructive method calculations: Kjeldahl method for determinating the protein, and then collected with NIR spectrum. We have built mathematical models for both the cob and stalks, based on these techniques and multivariated analysis allows the determination of an error prediction for the best protein 0.5% and the total nitrogen of 0.1%.

Kjeldahl method

10.15835/buasvmcn-agr:4294

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Citations (6)

Detection and Quantification of Arnica montana L. Inflorescences in Grassland Ecosystems Using Convolutional Neural Networks and Drone-Based Remote Sensing

Remote Sensing (2024)

Dragomir D. Sângeorzan F. Păcurar Albert Reif Holger Weinacker Evelyn Ruşdea

Arnica montana L. is a medicinal plant with significant conservation importance. It is crucial to monitor this species, ensuring its sustainable harvesting and management. The aim of this study is to develop a practical system that can effectively detect A. montana inflorescences utilizing unmanned aerial vehicles (UAVs) with RGB sensors (red–green–blue, visible light) to improve the monitoring of A. montana habitats during the harvest season. From a methodological point of view, a model was developed based on a convolutional neural network (CNN) ResNet101 architecture. The trained model offers quantitative and qualitative assessments of A. montana inflorescences detected in semi-natural grasslands using low-resolution imagery, with a correctable error rate. The developed prototype is applicable in monitoring a larger area in a short time by flying at a higher altitude, implicitly capturing lower-resolution images. Despite the challenges posed by shadow effects, fluctuating ground sampling distance (GSD), and overlapping vegetation, this approach revealed encouraging outcomes, particularly when the GSD value was less than 0.45 cm. This research highlights the importance of low-resolution image clarity, on the training data by the phenophase, and of the need for training across different photoperiods to enhance model flexibility. This innovative approach provides guidelines for mission planning in support of reaching sustainable management goals. The robustness of the model can be attributed to the fact that it has been trained with real-world imagery of semi-natural grassland, making it practical for fieldwork with accessible portable devices. This study confirms the potential of ResNet CNN models to transfer learning to new plant communities, contributing to the broader effort of using high-resolution RGB sensors, UAVs, and machine-learning technologies for sustainable management and biodiversity conservation.

Videography

10.3390/rs16112012

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Determination of Chemical Composition of Maize by Destructive and Non-Destructive Method

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Agriculture (2010)

Laura Dale Ioan ROTAR Roxana Vidican Adriana Morea Alin Mogos

Using NIRS technique is an elegant and very precise, this technique become more frequently used for determining physico-chemical properties of feed, especially chemical composition (dry matter, protein, ash, fiber, fat, non-nitrogenous extractive substances. The contents of dry matter, crude protein, crude ash, crude fiber, crude fat, non – nitrogenous extractive substances of maize are determined by destructive methods and then using them was build the calibration curve for NIRS with which we will determine all the chemical properties of the material using prediction. This paper aims to highlight a way of direct analysis method undestructive of crude protein, crude fat, crude fiber, crude ash, non-nitrogenous extractive substances using near infrared spectrometry technique in conjunction with reflected attenuated total. For each property we have used these method assessment: for the crude protein was used Kjeldahl method, for crude fat was used Soxhlet method, for crude ash performed Hennenberg – Stohmann method, for crude fiber was used Hennenberg - Stohmann method and for non – nitrogenous extractive substances was used mathematical calculation. All these results determined by the classical method, the destructive method, were used to build the calibration curve for device FT-NIR Spectrometer Perkin Elmer Spectrum 100 N with accessory N NIRA. Mathematical model was built using the near infrared spectrofotoscopiei technique in conjunction with multivariable calibration techniques using the Perkin Elmer program Spectrum Quant + 4.60. The method provides a rapid and reliable alternative to traditional quantitative methods for determining which usually requires several hours to complete.

Kjeldahl method

10.15835/buasvmcn-agr:5014

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Citations (2)

THE EVOLUTION OF THE FLORISTICAL COMPOSITION AND DRY MATTER YIELD IN A FESTUCA RUBRA MOUNTAIN PASTURE AS INFLUENCED BY SOME TECHNOLOGICAL INPUTS

DOAJ (DOAJ: Directory of Open Access Journals) (2007)

N. Sima Ioan ROTAR Roxana Vidican Rodica Sima

The paper presents the results of research regarding the evolution of both forage yield and floristic composition, as influenced by mineral fertilization (N100, P50, K100), organic fertilization (sheepfold), liming (CaCO3) and over-sowing, on a long-term experiment, conducted on a Festuca rubra pasture from the Cindrel Mountains, Romania. Four years after experiment installation, the obtained results show that the most important modifications concerning both floristic composition and forage yield levels were produced in the case of the complete fertilized (N100P50K100) and liming variant, respectively in case of P50K100 fertilized + over-sowing with Trifolium repens variant placed on limed soil. After eight years, the research results distinguish interesting modifications for N100P50K100 and P50K100 fertilized variants, as well as for the organic fertilized variant, all of them on limed soil.

Festuca rubra

Festuca

10.15835/nbha351257

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Yield Response and Competition Ability of Italian Ryegrass, Red Clover and Their Mixture to Different Technological Conditions�

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Agriculture (2018)

Vasile Iuga Ioan ROTAR Anamaria Mălinaş Gheorghe Toth

The effect of different technological conditions on forage yield, growth behavior and competition ability of ryegrass, red clover and their mixture was analyzed. The results showed that red clover makes better use of the nutrition space in the case of variants sown in mixture with Italian ryegrass than in the monoculture, independent of the density of the plants or fertilization regime. The highest DM production was obtained at the mixture formed by red clover and Italian ryegrass on the variants sown on 12.5 cm distance between rows, the increase of the nutrition space being directly proportional to the decrease of the DM production in the case of this forage mixture.

Red Clover

Monoculture

10.15835/buasvmcn-agr:002317

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Citations (1)