Facultatea de Biologie și Geoştiinţe / Faculty of Biology and Geosciences

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End date: 2013Has files: Yes

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    DEGRADAREA STRUCTURII SOLULUI CA URMARE A EXPLOATĂRII EXCESIVE ÎN AGRICULTURA CONTEMPORANĂ
    (Tipografia "Reclama", 2013-09-12) Nagacevschi, Tatiana
    Structure degradation is a process of the greatest practical interest, closely associated with the effects of agriculture in general, and intensive agriculture. In this context structural degradation occurs immediately after soil cultivation, the structure is subjected to the opposite processes: formation of blocks and dispersion. Another direct cause of structure degradation is soil compaction as a result of excessive traffi c, especially on wet soil. Structure degradation in the morphological aspect leads to processes of forming of structural elements of different shapes and sizes but without agronomic value, with insuffi cient porosity and poor hidrostability.
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    ACŢIUNEA DIFERITOR METODE DE ÎNTREŢINERE A SOLULUI UTILIZAT SUB LIVEZI ASUPRA PROPRIETĂŢILOR LUI FIZICE ŞI CHIMICE
    (Tipografia "Reclama", 2013-09-12) Grițcan, Sava; Nagacevschi, Tatiana
    Contemporary requirements necessary to develop a national strategy based on a scientifi cally based concept, oriented to effi cient use, control of productivity and protection of soils. Method of soil maintenance in orchards infl uences soil fertility: humus content in sodded and mulched with substrate variants is higher in comparison with fallow land; congruent are characterized soil physical properties. Sodding, mulching space between rows should be alternated with fallow land and in strips along the line should be alternated mechanical, biological and chemical methods
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    EFICACITATEA FERTILIZANTULUI FOLIAR –REACOM PLUS
    (CE UASM, 2013-09-27) Grițcan, Sava; Dadu, Zinaida; Polihovici, Lidia; Crivaia, Parascovia; Nagacevschi, Tatiana
    The article contains the results of a 2 year study of biochemical composition of apple fruits grown with the use of water-soluble fertilizers as well as of integrated products. It was established that weather conditions influenced the content of monosahara, sucrose separately and less their amount together. The content of dry substances and vitamin "C" remains unchanged. Application of fertilizers on tree development phases has a positive influence on biochemical composition of fruits. It was researched the comparative efficiency of foliar treatment of apple trees with the water-soluble complex fertilizer (Reacom Plus, Fosmex) as well as fertilizers containing nitrogen applied by installments on the background of fertilizers with phosphorus and potassium. It was established that the physiological state of the apple trees improved, the apple harvest increased and duration of fruits storage enhanced.
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    UNELE ASPECTE FIZICE ALE FOTOSINTEZEI
    (2007) Andronic, Ion; Frunză, Maria; Dușciac, Viorel
    Unul din principiile de bază de care se ţine cont la reformarea învăţământului şi elaborarea noilor programe şi manuale şcolare este principiul abordării interdisciplinare a obiectelor de studiu. Trimiterile interdisciplinare în predarea fizicii diminuează frontierele relative, arbitrare dintre fizică şi biologie şi pune accent pe conexiunile puternice existente între ştiinţele naturii, tratarea lumii reale ca un tot întreg. Abordarea interdisciplinară are drept scop formarea unor personalităţi moderne, cu gândire analitică, sistemică, cu capacităţi de înţelegere profundă şi aptitudini de modelare a fenomenelor, proceselor din jur, fiind totodată un factor important de educare, orientare şi formare profesională a elevilor - profesionişti ai viitorului. În calitate de exemplu de realizare a acestui principiu, în articolul de faţă sunt prezentate aspectele fizice ale fotosintezei ca factor fundamental în alimentaţia autotrofă a plantelor. Sunt analizate fazele de lumină şi de întuneric ale fotosintezei, dependenţa acestui proces complex de intensitatea energiei radiante, componenţa spectrală a luminii, fluxul luminos şi direcţia de incidenţă, influenţa altor factori fizici (umiditate, temperatură) etc. De asemenea, este arătat rolul fiecărui factor fizic în dezvoltarea plantelor, sunt analizate valorile optime ale factorilor fizici şi posibilitatea programării roadei prin controlul procesului de creştere a culturilor agricole. Se adresează profesorilor de fizică şi, în egală măsură, celor de biologie şi chimie.
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    INFLUENŢA NUTRIŢIEI CU FOSFOR ŞI FIER ASUPRA DEZVOLTĂRII NODOZITĂŢILOR LA PLANTELE DE SOIA ÎN CONDIŢII DE SECETĂ TEMPORARĂ
    (Tipografia "Reclama", 2013-09-12) Rotaru, Vladimir; Bîrsan, Ana
    Low-phosphorus availability and water stress are main environmental constraints of soybean growth and nodulation. A pot experiment was carried out to investigate the effect of phosphorus (P) and iron (Fe) application on nodulation in water-stressed soybean plants. Phosphorus (KH2PO4) and Fe (FE-EDTA) were applied in soil in dose 100 mg per kg of soil and 5 mg respectively. One set of plants was subjected to suboptimal water regime (35% WHC) at flowering stage for 12 days. Another set served as control was grown at normal moisture of soil (70 % WHC). Nodulation and plant growth were significantly decreased by low nutrient supply and drought. Combined effect of drought and P deficiency decreased most the growth of nodules and plants of both cultivars Zodiac and Licurici. Supplemental P nutrition alone or in combination with Fe significantly increased nodules biomass irrespective of soil water regime. However, its effect was more pronounced on cultivar of Licurici. It is concluded that harmful effects of water deficits can be attenuated by adequate nutrition with P and Fe of soybean plants.
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    CONSIDERAŢII METODOLOGICE PRIVIND STUDIILE ENCICLOPEDICE NAŢIONALE CU REFERIRE LA GEOGRAFIE
    (2013) Sochircă, Vitalie
    In articol sunt abordate unele aspecte cu caracter metodic privind studiile enciclopedice geografice din Republica Moldova. S-a realizat o analiză a studiilor anterioare din „Enciclopedia Sovietică Moldovenească” (1970–1981), comparativ cu cele în curs de desfășurare (ediţia nouă a enciclopediei), având la bază Ghidul „Recomandări metodice pentru autorii și redactorii Enciclopediei Moldovei”.
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    DINAMICA NUMERICĂ A POPULAŢIEI ÎN REGIUNEA GEOGRAFICĂ CENTRALĂ A REPUBLICII MOLDOVA ÎN PERIOADA 1989-2011
    (2013) Sochircă, Vitalie
    The article is a study on population geodemographic dynamics in Central Geographic Region of the Republic of Moldova during 1989-2011. Identify patterns and trends in population dynamics and analyzing the general dynamics of the region and districts in the context of demographic transition theory. In the study were used the following methods: statistical-mathematical, graph-analytic and cartographic. The study includes various materials and information on the population dynamics and can be used for educational and practical purpose
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    PRODUCTIVITATEA MICROALGEI VERZI DUNALIELLA SALINA LA CULTIVARE ÎN PREZENŢA UNOR COMPUŞI AI Ge(IV
    (CEP USM, 2013-09-26) Bivol, Cezara; Zosim, Liliana; Elenciuc, Daniela; Djur, Svetlana; Olan, Olga; Batîr, Ludmila
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    PURIFICAREA PARŢIALĂ A PROTEAZELOR EXOCELULARE OBŢINUTE LA CULTIVAREA MICROMICETEI TRICHODERMA KONINGII CNMN FD 15
    (CEP USM, 2013-09-26) Ciloci (Deseatnic), Alexandra; Bivol, Cezara; Kolker, Tatiana; Reva, Veaceslav