Scientific Papers Series A. Agronomy

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L. The first three species were mentioned by Tzonev and Gussev (2011) as characterizing inland salt meadows. The other three species- Bolboschoenus maritimus, Butomus umbellatus and Ranunculus aquatilis, as well as the greater part of vascular plant species included Group 3 and Group 4 such as Alisma lanceolatum With., Leersia oryzoides (L.) Sw., Lemna minor L., Poa palustris Vohlleb., Rumex palustris Sm., etc. are taxa typical of swampy and marshy areas. Their occurrence in the studied territory is accounted for by the considerable soil dampness during the greater part of the year since a salt meadow occurs together with a swamp. The other part of plants included in these two provisional groups are predominantly xerophytic and ruderal species. Their participation in the grass cover is due to the prolonged drought of part of the meadow during the hot months of the year. Ten of the 57 vascular plant species included in the present study were registered in samples of varying EC range (Figure 5). Four of them – Taeniatherum caput-medusae, Trifolium repens, Elymus elongatus, Cynodon dactylon have been found at locations with varying salinity level from slight to medium. Six species – Carex divisa, Hordeum hystrix, Alopecurus geniculatus, Bromus commutatus, Carex distans and Trifolium resupinatum have been registered both on saline and non-saline soils. CONCLUSIONS The data in the present study show that in the inland salt meadow near the town of Radnevo there is different salinity level – from nonsaline to medium saline. The salinity process results from the high level of underground water, the plain relief and the microdepressions on its territory. The reaction of the studied soil samples is from neutral to medium alkaline, predominant are the samples with alkaline reaction. A dominating factor for the grouping of the found 57 vascular plant species as a result of the applied cluster analysis is the electroconductivity of soil samples. Ten samples of the studied vascular plants- Taeniatherum caput-medusae, Trifolium repens, Elymus elongatus, Cynodon dactylon, Carex divisa, Hordeum hystrix, Alopecurus geniculatus, Bromus commutatus, Carex distans and Trifolium resupinatum have been registered in samples with different EC range, the last six species were found on non-saline and saline soils. Nine species – Carex distans, Cynodon dactylon, Elymus elongatus, Hordeum hystrix, Taeniatherum caputmedusae, Trifolium repens, Trifolium resupinatum, Dianthus campestris and Juncus gerardii are among the taxa mentioned as characterizing Inland salt meadows in Bulgaria. The most numerous in the studied territory are the populations of Carex distans, Elymus elongatus, Hordeum hystrix, Taeniatherum caput-medusae, Juncus gerardii, Bolboschoenus maritimus, Ranunculus aquatilis and Butomus umbellatus. Figure 5. Vascular plant species found in samples of different salinity level 123
Table 1. Cluster analysis of the studied vascular plants based on values of EC and pH in the measured soil samples Soil Group 1 Group 2 Group 3 Group 4 parameters pH 7.3-7.5 7.2-7.8 7.4-8.5 6.5-8.2 EC, μS.cm -1 2050-2057 1402-1014 756-444 356-123 Carex distans Host. Alopecurus geniculatus L. Carex divisa Huds Alisma lanceolatum With. Bromus commutatus Guss. Ex Bolboschoenus maritimus Carex divisa Huds Alisma lanceolatum With Stend Palla Cynodon dactylon (L.) Pers. Carex distans Host. Alopecurus geniculatus L. Bromus arvensis L. Elymus elongatus (Host) Bromus commutatus Guss. Ex Carex divisa Huds Alopecurus pratensis L. Runemark Steud. Hordeum hystrix Roth Cynodon dactylon (L.) Pers. Atriplex hastata L. Bromus secalinus L. Rorippa sylvestris (L.) Beckmannia eruciformis Dianthus campestris Willd. Besser Host Butomus umbellatus L. Taeniatherum caputmedusae (L.) Nevski Runemark Palla Elymus elongatus (Host) Bolboschoenus maritimus Carex acutiformis Ehrh. Bromus commutatus Trifolium repens L. Hordeum hystrix Roth Guss. ex Stend. Centaurea calcitrapa L. Dischanthium Trifolium resupinatum L. Juncus gerardii Loisel Carex distans Host ischaemum (L.) Roberty Lysimachia nummularia L. Eleocharis palustris (L.) Carex hordeistichos Vill. Roem. & Schult Mentha pulegium L. Carex vulpina L. Festuca erundinacea Vill. Persicaria mitis (Schrank.) Opiz Convolvulus arvensis L. Juncus effuses L. Coronopus procumbens Pulicaria vulgaris Gaertn Gilib. Lemna minor L. Ranunculus constantinopolitanus d Urv Datura stramonium L. Lycopus exaltatus L. Taeniatherum caput-medusae Elymus elongatus (Host) Mentha longifolia (L.) Huds. (L.) Nevski Runemark Galium octonarium Trifolium repens L. (Klokov) Soó Oenanthe silaifolia M. Bieb. Persicaria mitis (Schrank.) Trifolium resupinatum L. Hordeum hystrix Roth Opiz Leersia oryzoides (L.) Sw. Plantago major L. Lolium perenne L. Poa bulbosa L. Lysimachia nummularia Poa compressa Schrenk ex L. Ledeb. Medicago arabica (L.) Huds. Poa palustris Vohlleb. Mentha longifolia (L.) Huds. Pulicaria vulgaris Gaertn. Oenanthe silaifolia M. Bieb. Ranunculus aquatilis L. Poa bulbosa L. Ranunculus lanuginosus L. Poa compressa Schrenk ex Lebed Ranunculus lateriflorus DC. Poa palustris Wohlleb Ranunculus sardous Crantz Poa pratensis L. Rumex palustris Sm. Poa sylvicola Guss. Rumex palustris Sm. Veronica anagallisaquatica L. ACKNOWLEDGEMENTS This work was supported financially by the project No 2/12 Subject: “The investigation of inland salt meadow near the town of Radnevo, Stara Zagora” Trakia University, Agricultural faculty. 124 REFERENCES Biological Diversity Act (Act on Amending and Supplementing the Biological Diversity Act)., 2007. Decree no. 354 accepted by the 40th National Assembly on 01 November 2007. – Darzhaven Vestnik, no. 94/16.11.2007, pp. 2-44 (in Bulgarian). Delipavlov D., Cheshmedzhiev I., (eds)., 2003. Key to the Plants of Bulgaria. Acad. Press Agrarian Universitet, Plovdiv (in Bulgarian).
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SCIENTIFIC PAPERS SERIES A. AGRONOM
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University of Agronomic Sciences an
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SUMMARY SOIL SCIENCES Variation of
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A survey study on determination of
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Effects of different nitrogen forms
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Determine the effect of some cultiv
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SOIL SCIENCES
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K + /Na + ratio that ultimately pre
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ZINC POLLUTION OF SOILS LOCATED INT
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as the result of the plant protecti
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OBTAINING OF HUMATE-BASED LIQUID FE
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an 11.6% mass loss and a 145.5 J/g
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mijloc important de fertilizare ech
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collected on 13/09/2012 at the dept
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Table 3. The Influence of mineral f
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CONCLUSIONS The Hybrid rapeseedseed
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Scientific Papers. Series A. Agrono
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CONCLUSIONS The results have shown
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organic carbon was determined thoug
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THE INFLUENCE OF SOIL TILLING SYSTE
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emerging plant, we recommend using
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at the cellular level of Ni (Bou et
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concentrations in agricultural soil
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Surfaces at the bottom shows higher
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substantial balance that means maxi
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Table 4. Aggregate composition and
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1. The initial parameters of ordina
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Table 8. Modification of the featur
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Abstract Scientific Papers. Series
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the linear correlation coefficient
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CONCLUSIONS For soil polluted with
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50 and 100 mg/kg and appreciated th
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Figure 4. Copper content in soil Fi
Page 73 and 74: samples collected in northern of fa
Page 75 and 76: MATERIALS AND METHODS Study areas T
Page 77 and 78: influenced by heavy metals contamin
Page 79 and 80: Pankhurst C.E., 1997. Biodeversity
Page 81 and 82: horizons, color, texture, structure
Page 83 and 84: From a chemical reaction these soil
Page 85 and 86: - Organic matter by Tiurin; - pH (H
Page 87 and 88: Abstract Scientific Papers. Series
Page 89 and 90: RESULTS AND DISCUSSIONS Invertebrat
Page 91 and 92: of moisture in arable layers, incre
Page 95 and 96: experimentation. The increase of mo
Page 97 and 98: THE TRANSITION PERIOD TO THE MARKET
Page 99 and 100: Activity data Activity data comes f
Page 101 and 102: Figure 2. The decrease of cultivate
Page 103 and 104: of nitrous oxide. In: Revised 1996
Page 105 and 106: Laboratory results have been interp
Page 107 and 108: The air-mass interferes with the ov
Page 109 and 110: Under these conditions, Moldavian r
Page 111 and 112: decreased to near wilting coefficie
Page 113 and 114: CONCLUSIONS Severe drought that aff
Page 115 and 116: (temperature and soil moisture, air
Page 117 and 118: primary cultures analyzed, hybrids
Page 119 and 120: weeding crops during the growing se
Page 121 and 122: improper drainage and irrigation (G
Page 123: Figure 4. Scores plot of the soil s
Page 127 and 128: DIFFERENTIATION OF FERTILIZATION RA
Page 129 and 130: Figure 2. Situation and location of
Page 131 and 132: Statistical data processing For the
Page 133 and 134: Phosphorus and potassium fertilizer
Page 135 and 136: 30 m. Regarding the formation and d
Page 137 and 138: considerably less. These facts are
Page 139 and 140: Table 2. Hydraulic dimensioning Par
Page 141 and 142: SPATIAL VARIATION OF PHYSICAL CLAY
Page 143 and 144: Figure 2. Situation and location of
Page 145 and 146: esistant to high clay content in th
Page 147 and 148: CONCLUSIONS Described regularities
Page 149 and 150: ecome widespread and in order to ea
Page 151 and 152: Table 3. Results of the analysis of
Page 153 and 154: COMPARISON OF SYSTEMS FOR TAXONOMY
Page 155 and 156: RESULTS AND DISCUSSIONS Soil types
Page 157 and 158: underdeveloped cinnamon forest soil
Page 159 and 160: Figure 8. Content of skeletal fract
Page 161 and 162: MODEL FOR INVESTIGATION, AMELIORATI
Page 163 and 164: RESULTS AND DISCUSSIONS Characteris
Page 165 and 166: terrain is in the composition of a
Page 167 and 168: Such characteristics require the ne
Page 172 and 173: Australia) with high resolution nit
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some important medicinal plants of
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RFV = [120 / NDF] × [88.9 - (0.779
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average at Viani - Brila County). A
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Figure 1. Dry above-ground biomass
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County) and 30.29% (CERA 270 hybrid
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phenological stages were found to h
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STUDIES REGARDING THE INFLUENCE OF
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ainfall were able to have a negativ
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Figure 7. Thermo-hydric stress fact
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In Romania is grown a large assortm
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Mainly vitamin C, E and polyphenols
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soluble compounds with antioxidant
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primarily the water-soluble antioxi
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has a split-split-plot design with
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Kovács B., Gyori Z., Prokisch J.,
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pays off (Mares et al., 2004; Gonz
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Table 3. Tested variants V1 Control
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about the inner value of flora. The
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MATERIALS AND METHODS Biological ma
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Figure 2. Correlation between prote
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CONCLUSIONS Production and quality
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The following presents several tech
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3. Evolution of total weed number i
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RESEARCH ON APPLICATION OF NPK FERT
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Also increase production significan
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In April 2012, the pre-sowing proce
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difference with the hoed control sa
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RESULTS AND DISCUSSIONS Data about
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Table 7. Proved difference between
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Table 1. Variance analysis experien
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Amongst the three precocity groups,
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ACKNOWLEDGEMENTS This study was car
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to present genetic sources of resis
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REFERENCES Antonova T.S., Araslanov
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Halstedii is necessary to identify
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EFFICIENCY OF UTILIZATION OF ASELEC
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to separate the effects of genotype
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INFLUENCE OF THE CLIMATIC CONDITION
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In 2012, at NARDI Fundulea, data fr
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parameter from the treated variants
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Table 6. The effectiveness of some
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Table 1. Probability of the meteoro
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At 50% DI in EOF, only a small part
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This was probably due to the specif
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under deficit irrigation. This prov
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RESULTS AND DISCUSSIONS Intervals w
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productions from one year to anothe
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epresented by soil ecologization an
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new created ones as a basic conditi
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The highest number of kernels per e
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Table 8. Average weight of thousand
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CONCLUSIONS The drought from the ye
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IWM as appropriate, necessary studi
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100% in the first 6 weeks of growth
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locules boll -1 (0.02), seeds locul
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Bhutto H., Baloch M.J., Yousaf M.,
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Table 4. GCA effects for morpho-yie
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MATERIALS AND METHODS This study wa
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vegetation of each of the swaths, i
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Sudangrass hybrids depending on the
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The parameters of biomass and dry m
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transplanting and ½ applied at fir
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Fertilization Forms Table 2. The me
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growing agricultural farms; evoluti
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In this area, priority must be to p
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soybean seeds are found farms that
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are a better material for haploid i
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Figure 6. Embryo and endosperm mark
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RESEARCHES CONCERNING THE INFLUENCE
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Table 1. The influence of seeding d
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Exagone hybrid. Thus, when sown at
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Table 9. The influence of sowing di
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MATERIALS AND METHODS In order to k
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Table 3. Genotype influence on whea
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Romanian varieties from the experim
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Table 2. Efficacy of some fungicide
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ROMANIAN WHEAT - STRATEGIC PRODUCT
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exceeded 2,000 thou ha, and maximum
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Values over 26% wet gluten were det
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effective and can build a significa
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grassland. This method is commonly
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RESULTS REGARDING DROUGHT RESISTANC
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average for this period is 170.6 mm
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Hybrid FAO grupe Table 2. The main
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length has lowest values at the unt
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CHARACTERISTICS OF SECOND GENERATIO
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developed in Dobrudzha Agricultural
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Table 5. Cytological characteristic
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We can see in the table that all li
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RESULTS AND DISCUSSIONS Mean compar
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Table 4. Statistical interpretation
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COMPARATIVE STUDY OF CONVENTIONAL A
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Improved sunflower hybrids for use
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differences in production to contro
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International Center for Agricultur
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Table 3. Evaluation of Genotypes fo
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Table 1. Characteristics of city sl
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Table 4. Amount of the rainfall dur
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ECOLOGICAL AGRICULTURE
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maize had a density of 5 plants/m 2
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CONCLUSIONS In terms of productivit
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amino acids, such as 4-hydroxyisole
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Table 5. Determining chlorophyll pi
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PROPOSALS ON TECHNOLOGY OF MOVING A
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These are the main technical charac
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FUNGAL BIODIVERSITY AND CLIMATE CHA
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Climate change effects and Dobrogea
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Figure 10. Pure culture of benefici
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MANAGEMENT OF BENEFICIAL MICROORGAN
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microorganisms DSMZ Braunschweig -
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Protocol of research and reporting
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“HERBAL MEDNET” AN INNOVATIVE A
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Figure 2. Value of global herbal ma
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Figure 3. The Allelopathy effect on
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AGRICULTURAL ENGINEERING AND RENEWA
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Research was also aimed at observin
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Leaf production of dry matter per h
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cooking oil and jatropha oil (Vonsh
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machines, many different fat extrac
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Table 4. The nutrient content Conte
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Figure 21. Dunaliella salina sp. ch
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for the decline is the growing numb
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Tractor power seemed the obvious wa
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Figure 4 shows that in 17 post war
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their employability, help raise the
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. Scientific Papers. Series A. Agro
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through the sprinkler irrigation. A
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Figure 5. Overlapping sprinklers wi
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CLIMATE CHANGE AND AGROMETEOROLOGIC
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Bulgaria to the use of agroclimatic
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Figure 9. Duration of the period so
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Figure 18. Evapotranspiration of wi
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RESULTS AND DISCUSSIONS After scari
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The influence of the texture on the
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Figure 6. Area of land planted with
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APPLIED BIOLOGY IN AGRICULTURAL SCI
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MATERIALS AND METHODS Researches we
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RESEARCHES REGARDING EVOLUTION OF S
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gradually reduce towards the end of
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According to that, the aspect of th
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etween classes of variation with ma
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Table 2. Average heights of Lycium
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V 1 V 2 Table 6. Average shoot leng
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Table 13. Average dry substance of
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centrifuge (7000 rev/min. during 20
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7, Streptomyces sp. 9, and Streptom
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laboratory of Biology, USAMV Buchar
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SOME NEW SPECIMENS FOR ZOOLOGICAL T
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New reptiles for our teaching colle
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Figure 1. Scatter plot of odontosty
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Table 4. Measurements of Xiphinema
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Malus pumila and P. avium are new h
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- the mean, minimum and maximum mon
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The monthly mean of the flow highli
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longer in balance with the existing
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ecording the encountered plant spec
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Mediterranean (3), Balkan (1), Cent
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Table 3. Segetal species of the Top
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of sugar/flower and the honey poten
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Territorial concentration of mellif
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CONCLUSIONS In Giurgiu County there
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farm (Awake, 1998). Rahman et al. 2
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Table 3 shows that there was a high
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RESULTS AND DISCUSSIONS x, k, r, R
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Figure 3. Us-Pressure Relations of
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