scholarly journals MORPHO-PHYSIOLOGICAL FEATURES OF WILD-GROWING SAMPLES OF MEADOW TIMOTHY GRASS (Phleum pratense L.)

2020 ◽  
Vol 2020 (4) ◽  
pp. 39-45
Author(s):  
Valentina Korovina ◽  
Nikolay Kozlov ◽  
Tamara Komkova
Keyword(s):  
Statistical Processing ◽  
Dry Mass ◽  
Phleum Pratense ◽  
Significance Level ◽  
Timothy Grass ◽  
Experimental Base ◽  
Standard Collection ◽  
Grass Stand ◽  
Optimal Productivity ◽  
Phleum Pratense L

The research was carried out in the field at the Central experimental base of the Federal Williams Re¬search Center. The object of research was 12 samples of wild-growing meadow timothy grass. Samples were sown according to the scheme of a standard collection nursery. All studies and observations were carried out on the herbage of the 2nd and 3rd year of life. Statistical processing of results of researches of meadow timothy indicates a low level of variation in the main morphological and physiological characte¬ristics. Only by the number of vegetative shoots have the coefficient of variation reach 35.8%. Samples 416 and 419 were distinguished by precocity, samples 406 and 419 by the height of plants during flower¬ing, sample 412 by the number of generative shoots, and sample 412 by the yield of air-dry mass. Sam¬ples 409 and 414 were distinguished by the length of the sultan, and the weight of seeds — 414 and 415. Nine reliable correlations were found at the significance level 05 and 01. However, all of them are related to the yield of the number of generative and vegetative shoots. Using the binomial equation, the experi¬mentally obtained variability of dry mass yield from the number of generative and vegetative shoots by 93.1% is described. The optimal productivity of meadow timothy grass stand for generative shoots in the area of 550–600 shoots, and vegetative ones — in the area of 320–350 shoots per square meter. Analysis of remoteness and kinship between samples showed the presence of 2 clusters (genetically different quality groups), which can be used for combinational ability selection and fixing of selection-valuable features and properties.

CHEMICAL COMPOSITION OF WILD SAMPLES OFTIMOTHY-GRASS (PHLEUM PRATENSE L.)

2020 ◽  
Author(s):  
Valentina Korovina ◽  
Nikolay Kozlov ◽  
Tamara Komkova
Keyword(s):  
Chemical Composition ◽  
Statistical Processing ◽  
Phleum Pratense ◽  
Research Center ◽  
Timothy Grass ◽  
Low Level ◽  
Experimental Base ◽  
Standard Collection ◽  
Phosphorus And Potassium ◽  
Phleum Pratense L

The research was carried out in the field at the Central experimental base of the Federal Williams Research Center. The object of research was 13 samples of timothy-grass. Samples were sown according to the scheme of a standard collection nursery. All studies and observations were carried out on the herbage of the 2nd and 3rd year of life. Statistical processing of the research results indicates a low level of variation. The sample № 414 stood out high content of raw protein and raw fat. Two significant correlations were found (between the content of phosphorus and potassium, as well as between crude fiber and crude ash). Analysis of remoteness and kinship between samples showed the presence of 5 clusters (genetically different quality groups), which can be used for breeding for combinational ability and fixing of breeding-valuable features and properties.

Evaluation of the actual evapotranspiration model of decomposition at a subalpine surface coal mine

1986 ◽  
Vol 64 (1) ◽  
pp. 35-38
Author(s):  
W. F. J. Parsons ◽  
D. M. Durall ◽  
D. Parkinson
Keyword(s):  
Dry Mass ◽  
Phleum Pratense ◽  
Decay Rates ◽  
Actual Evapotranspiration ◽  
Site Specific ◽  
Surface Coal Mine ◽  
Mass Losses ◽  
A Site ◽  
Phleum Pratense L ◽  
Single Exponential

Percentages of original dry mass lost annually and single exponential decay rates (k) for timothy (Phleum pratense L.) leaf litter decomposing on three reclaimed subalpine mine spoil plots (7, 3, and 1 years old) in Alberta, Canada, were compared with values predicted using generalized equations devised by Meentemeyer on the basis of an annual regional average of actual evapotranspiration (Thornthwaite) and a site-specific value (Christiansen). Measured decay rates on the more heavily vegetated plots (3 and 7 years old) were similar to k values predicted using Christiansen actual evapotranspiration values, while the decay rate on the plot with the least amount of vegetation cover (1 year old) was much greater than k values predicted using Christiansen or Thornthwaite actual evapotranspiration values. The actual evapotranspiration model severely underestimated annual percentage mass losses, regardless of whether Thornthwaite or Christiansen actual evapotranspiration values were used.

scholarly journals EVALUATION OF TRAIT VARIABILITY IN VARIOUS COLLECTION SAMPLES OF ALFALFA

2021 ◽  
Vol 2021 (1) ◽  
pp. 15-23
Author(s):  
Mikhail Makarenkov ◽  
Nikolay Kozlov ◽  
Tamara Komkova
Keyword(s):  
Crude Protein ◽  
Statistical Processing ◽  
Forage Production ◽  
Medicago Lupulina ◽  
Experimental Base ◽  
Standard Collection ◽  
Medicago Sativa L ◽  
High Level ◽  
Maximum Content ◽  
Selection Of

The research was carried out in the field at the Central Experimental Base of the Federal Williams Research Center of Forage Production and Agroecology. The object of research was 41 samples of alfalfa. The samples were sown according to the scheme of a standard collection nursery. All studies and observations were carried out on the herbage of the second and third years of life. Statistical processing of the research results showed a generally high level of variation in the characteristics. We identified the 4 best samples for a set of features. Several significant positive and negative correlations have been identified, which can be used as indirect signs in the evaluation and selection of promising forms. This method allowed us to identify 3 genetically different groups (clusters) of samples that differ in the nature of the formation of traits. The first cluster includes samples 49, 54, 66, ... and 193 belonging to various studied species. But mostly they represent the species Medicago sativa L. The samples differ little in the content of crude fiber and crude protein. The second cluster includes samples 454, 605, 583, ... and 598, which had average values for most indicators. The third group of samples includes 192, 646 and 355 (Medicago lupulina L. and Medicago glutinosa M.B.) with a maximum content of crude protein. The analysis of the distance and kinship between the samples revealed the presence of three clusters that can be used in breeding for combinational ability and consolidation of breeding-valuable traits.

5S rDNA of timothy- grass Phleum pratense L.

2018 ◽  
Vol 10 (2) ◽  
pp. 107-112
Author(s):  
O Ishchenko ◽  
◽  
T Derevenko ◽  
I Panchuk ◽  
◽  
...  
Keyword(s):  
5S Rdna ◽  
Phleum Pratense ◽  
Timothy Grass ◽  
Phleum Pratense L

scholarly journals Characteristics of growth and development of perennial grasses on the basis of meadow tetraploid clover

2019 ◽  
Vol 20 (3) ◽  
pp. 247-255
Author(s):  
N. I. Kasatkina ◽  
Zh. S. Nelyubina
Keyword(s):  
Plant Density ◽  
Phleum Pratense ◽  
Perennial Grasses ◽  
High Yield ◽  
Soil Conditions ◽  
First Year ◽  
Timothy Grass ◽  
The Third ◽  
Grass Stand ◽  
Second Year

Perennial grasses are less dependent on weather and soil conditions than other crops due to their plasticity, low demand for growing conditions, and a large variety of species. In 2013-2017 in the conditions of the Udmurt Republic the biological properties of meadow tetraploid clover (Trifolium pratense L.), alfalfa changeable (Medicago x varia Martyn), birds-foot trefoil (Lotus corniculatus L.), eastern galega (Galéga orientális Lam.) and timothy grass (Phleum pratense L.) in double and triple agrocenoses were studied according to the age of the grass stand and the term of mowing. Plant density of perennial grasses in agrocenoses depended on the biological characteristics of the species, the age of grass stand and the term of mowing. In the first year of use of agrophytocenoses the density of stalk stand was at the level of 374-542 pcs /m2, in the second year of use it was a little higher (348-688 pcs /m2), in the third year of use – 240-594 pcs /m2. High density of meadow tetraploid clover in the grass stand was noted in the second year of use – 266-520 pcs/m2. The number of timothy grass stems (122-194 pcs/m2) in the grass mixture was high even in the first year of grass stand use, in the following years there was a further increase of this indicator to 196-412 pcs/m2. By the third year of use there was an increase in the number of stems of alfalfa changeable to 86-148 pcs/m2 and birds-foot trefoil – up to 108-200 pcs/m2. The plant density of the eastern galega in agrocenoses was low. The agrometeorological conditions of the year and the term of mowing affected the height and leafiness of perennial grass plants in agrocenoses. The leafiness of meadow tetraploid clover reached 64%, of the eastern galega – 74%. Timothy grass plants were less leafy – 23-38%. The height  of meadow clover plants was at the level of 51 cm, of timothy grass – 75-78 cm. Birds-foot trefoil was the shortest component of grass mixtures. High yield of dry mass of single-species sowing of meadow tetraploid clover was obtained in the first two years of use – 7.8 and 6.5 t/ha, respectively. By the third year of use, the productivity of clover decreased to 2.9 t/ha. The highest yields for the years of research were formed by the following agrocenoses: clover + alfalfa, clover + timothy, and clover + alfalfa + timothy – 5.9-6.3 t/ha.

Metabolite accumulation during ice encasement of timothy grass (Phleum pratense L.)

1994 ◽  
Vol 102 ◽  
pp. 373-380 ◽  
Author(s):  
Bjarni E. Gudleifsson
Keyword(s):  
Pseudomonas Fluorescens ◽  
Phleum Pratense ◽  
Anoxic Conditions ◽  
Timothy Grass ◽  
Subzero Temperatures ◽  
Long Duration ◽  
Ice Encasement ◽  
Metabolite Accumulation ◽  
Phleum Pratense L ◽  
Thaw Water

SynopsisPlants are killed by prolonged ice encasement at slightly subzero temperatures and under these anoxic conditions a number of metabolites are accumulated. Timothy grass plants encased in ice at −2°C can survive these conditions for many weeks and accumulate mainly CO2 and ethanol and lower levels of malate, oxalate, citrate, fumarate and pyruvate. While the accumulation of most of the metabolites increases towards the end of the encasement period the amount of malate decreases, indicating utilisation. Late in the encasement period lactate, butyrate, and traces of malonate, formate and tartarate were detected which might be of bacterial origin. The bacteria most commonly isolated from ice-encased plants is Pseudomonas fluorescens (Trevisan) which in most cases is saprophytic. All of the above-mentioned metabolites were also detected from thaw water in the field after long duration of ice encasement, butyrate attaining the highest concentration.

FEED OF THE MERITS OF THE COLLECTOR'S SAMPLES OF BLUEGRASS

2020 ◽  
Author(s):  
Nikolay Malyuzhenets ◽  
Nikolay Kozlov ◽  
Evgenia Malyuzhenets ◽  
Tatyana Kozlova
Keyword(s):  
Multivariate Analysis ◽  
High Probability ◽  
Paired Comparison ◽  
Statistical Processing ◽  
Breeding Material ◽  
Experimental Base ◽  
Standard Collection ◽  
Euclidean Distances ◽  
Reliable Correlation ◽  
Selection Of

The research was carried out in the field at the Central experimental base of the «Federal Williams Research Center» The object of research were 32 samples of bluegrass. Samples are sown according to the scheme of a standard collection nursery. All studies and observations were carried out on the herbage of the 4th year of life. Statistical processing of the research results revealed the average level of variation of signs. Several reliable correlation dependences have been revealed, which can be used as indirect signs in the evaluation and selection of promising breeding material. Multivariate analysis showed that in the bluegrass sample, there are 4 clusters (genetically heterogeneous groups), which can be used for selection on the combinational ability and consolidation of selection — valuable traits and properties. Samples of Kentucky (USA) and Balin (Germany) had the maximum superiority (distance), when paired comparison of Euclidean distances. The use of these samples with a high probability promises to obtain perspective breeding material.

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