scholarly journals Bioaccumulation of nitrogen and phosphorus by lawn plants in urban environment

2020 ◽  
pp. 86-94
Author(s):  
Марина Григорьевна Половникова ◽  
Ольга Леонидовна Воскресенская ◽  
Елена Александровна Алябышева
Keyword(s):  
Urban Environment ◽  
Phosphorus Content ◽  
Poa Pratensis ◽  
Dactylis Glomerata ◽  
Middle Aged ◽  
Nitrogen And Phosphorus ◽  
Dactylis Glomerata L

В условиях городской среды в биомассе онтогенетических групп газонных растений (ежа сборная, мятлик луговой) определяли содержание азота и фосфора, а также биоаккумулятивную способность ценопопуляций видов. В работе использовались растения трех возрастных состояний: виргинильные (v), средневозрастные генеративные (g2) и субсенильные (ss). По мере усиления загрязнения среды и в ходе онтогенеза уменьшалось содержание общего азота и общего фосфора в биомассе газонных растений. При оценке биоаккумулятивной способности ценопопуляций изученных видов установлено, что ценопопуляции ежи сборной накапливали большее количество общего азота и общего фосфора во всех местообитаниях. In the urban environment, the biomass of ontogenetic groups of lawn plants (Dactylis glomerata L., Poa pratensis L.) was determined by the content of nitrogen and phosphorus, as well as the bioaccumulative ability of species coenopopulations. We used plants of three ages: virginil (v), middle-aged generative (g2), and subsenile (ss). As pollution increased and during ontogenesis, the nitrogen and phosphorus content in the biomass of lawn plants decreased. In assessing the bioaccumulative capacity of the coenopopulations of the studied species, it was found that the coenopopulations of Dactylis glomerata accumulated more nitrogen and phosphorus in all habitats.

scholarly journals Effect of Pasture Management System Change on In-Season Inorganic Nitrogen Pools and Heterotrophic Microbial Communities

Agronomy ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 724
Author(s):  
Maciej Musiał ◽  
Jan Kryszak ◽  
Witold Grzebisz ◽  
Agnieszka Wolna-Maruwka ◽  
Remigiusz Łukowiak
Keyword(s):  
Management System ◽  
Poa Pratensis ◽  
Inorganic Nitrogen ◽  
Dactylis Glomerata ◽  
Available Phosphorus ◽  
Pasture Management ◽  
Dactylis Glomerata L ◽  
Grass Sward ◽  
The Impact

It has been assumed that the system of long-term pasture management exerts a significant impact on the soil microorganisms count, subsequently affecting the availability of mineral nitrogen (Nmin). This hypothesis was tested in a three-year experiment on a long-term pasture with two distinct systems of grass sward management, i.e., grazing and mowing. Mowing significantly increased the microorganisms count by 13%, 28%, 86%, and 2% for eubacteria (EU), actinobacteria (AC), molds (MO), and Azotobacter (AZ), respectively. The main reason was drought in 2006, which resulted in the domination of Dactylis glomerata L. in the grass sward, instead of Lolimum perenne L. and Poa pratensis L. The content of Nmin decreased through the vegetative growing season, reaching its lowest value after the 3rd grazing cycle. The impact of microorganisms on the Nmin pools increased in the order: molds < eubacteria < actinobacteria. The count of actinobacteria in the alkaline organic soil increased in response to drought, contribution of Dactylis glomerata L. in the sward, and the shortage of available phosphorus. The sound pasture management system is possible by introducing alternate grazing and mowing cycles. The core of sustainability is the enhanced activity of actinobacteria after changing the system from grazed into mowed.

EVAPOTRANSPIRATION BY IRRIGATED GRASS AS RELATED TO FERTILIZER

1967 ◽  
Vol 47 (3) ◽  
pp. 281-287 ◽  
Author(s):  
K. K. Krogman
Keyword(s):  
Plant Material ◽  
Dactylis Glomerata ◽  
Maximum Growth ◽  
Western United States ◽  
Yield Response ◽  
Festuca Rubra ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Red Fescue ◽  
Dactylis Glomerata L

Efficiency of water use by a mixed sward of orchardgrass (Dactylis glomerata L.), creeping red fescue (Festuca rubra L.), and bromegrass (Bromus inermis Leyss.), fertilized with three levels each of nitrogen and phosphorus in all combinations and irrigated to promote maximum growth, was increased with increasing applied nitrogen. Yield response to nitrogen fertilizer was large and to phosphorus fertilizer was small. When total dry plant material exceeded about 4 metric tons/ha, increases of evapotranspiration with increased crop size were relatively small. The greatest daily rates of crop growth and the most efficient use of water by the crop occurred in midsummer on plots fertilized with nitrogen at 420 kg/ha. The ratios of evapotranspiration to estimated solar radiation expressed as evaporation equivalent were similar to those reported for crops in the western United States.

scholarly journals Total nitrogen content in vegetative organs of lawn plants in urban environment

2020 ◽  
pp. 179-186 ◽  
Author(s):  
Марина Григорьевна Половникова ◽  
Ольга Леонидовна Воскресенская
Keyword(s):  
Nitrogen Content ◽  
Urban Environment ◽  
Total Nitrogen ◽  
Trifolium Pratense ◽  
Poa Pratensis ◽  
Total Nitrogen Content ◽  
Middle Aged ◽  
Vegetative Organs ◽  
Trifolium Pratense L ◽  
Leaves And Roots

В условиях городской среды в вегетативных органах газонных растений (клевер луговой, мятлик луговой) определяли содержание общего азота. В работе использовались растения трех возрастных состояний: виргинильные (v), средневозрастные генеративные (g2) и субсенильные (ss). По мере усиления загрязнения среды и в ходе онтогенеза уменьшалось содержание общего азота в листьях и корнях газонных растений. При этом повышенное содержание общего азота в вегетативных органах было характерно для особей Trifolium pratense L. по сравнению с особями Poa pratensis L Total nitrogen content was determined in the vegetative organs of lawn plants (Trifolium pratense L., Poa pratensis L.) in the urban environment. We used plants of three age ranges: virginile (v), middle-aged generative (g2), and subsenile (ss). As pollution increased as well as during ontogenesis, the total nitrogen content in the leaves and roots of lawn plants decreased. The increased content of total nitrogen in vegetative organs was typical for individuals Trifolium pratense L. compared with individuals Poa pratensis L.

Productivity and Environmental Role of Forest Shelterbelts of Robinia pseudoacacia L. of the Kuban Lowland

2020 ◽  
pp. 88-97
Author(s):  
V.V. Tanyukevich ◽  
◽  
S.V. Tyurin ◽  
D.V. Khmeleva ◽  
A.A. Kvasha ◽  
...  
Keyword(s):  
Agricultural Land ◽  
Land Reclamation ◽  
Poa Pratensis ◽  
Robinia Pseudoacacia ◽  
Average Height ◽  
Middle Aged ◽  
Aboveground Phytomass ◽  
Robinia Pseudoacacia L ◽  
Young Growth

Works on protective afforestation are carried out in order to protect agricultural land from degradation processes, as well as to improve the microclimate of land. The research purpose is to study the bioproductivity and environmental role of Robinia pseudoacacia L. forest shelterbelts in the conditions of the Kuban lowland. The approved and generally accepted methods of forest valuation, forest land reclamation, botany, and mathematical statistics were applied. Plantings were created according to the standard technology for the steppe zone of the Russian Federation. The area of forest shelterbelts is 62.4 ths ha, including 5 % of the young growth (I state class), 80 % of middle-aged forest plantings (II state class), 10 % of maturing plantings (II state class), 5 % of mature and overmature plantings (III state class). Living ground cover is formed by the following species: Koeleria pyramidata L., Poa pratensis L., Festuca pratensis H., Elytrígia repens L., Dactylis glomerata L., and Phlum pratense L. Aboveground phytomass is 100–300 g/m2; height is 25–32 cm. Plantings are characterized by the quality classes: young growth – I and II; middle-aged and maturing – III; mature and overmature – IV. At the age of natural maturity (70 years), the Robinia trunk reaches the average height of 15.1 m with the average diameter of 22.1 cm. The total stock of wood reaches 18, (ths m3), including (ths m3): young growth – 68 (ths m3); middleaged plantings – 14,871 (ths m3); maturing plantings – 2,187 (ths m3); mature and overmature plantings – 1,314 (ths m3). Aboveground phytomass in young growth is 20.2 t/ha; in mature and overmature plantings it is 391.2 t/ha. In the region it is estimated at 17,070 ths t, including (ths t): young growth – 64; middle-aged plantings – 13,753; maturing plantings – 2,032; mature and overmature plantings – 1,221. The share of stem mass reaches 84.5–80.8 %; woody greenery – 4.2–1.5 %; branches – 11.3–17.7 %. Recalculation coefficients of the stock into aboveground phytomass are the following for: young growth – 0.936; mature and overmature forest shelterbelts – 0.929. Phytosaturation of forest shelterbelts varies within 0.314–2.474 kg/m3. Forest shelterbelts have accumulated 8,534 ths t of carbon, which is estimated at 145.1 mln dollars. The sphere of application of the research results is the Krasnodar Krai forestry, which is recommended to create an additional 60 ths ha of forest shelterbelts, which will provide a normative protective forest cover of arable land of 5 % and annual carbon sequestration up to 3.4 t/ha.

Influence of N Fertilization and N Carryover on Yield and N Concentration of Dactylis glomerata L. 1

1973 ◽  
Vol 65 (4) ◽  
pp. 671-674 ◽  
Author(s):  
S. J. Donohue ◽  
C. L. Rhykerd ◽  
D. A. Holt ◽  
C. H. Noller
Keyword(s):  
Dactylis Glomerata ◽  
N Fertilization ◽  
N Concentration ◽  
Dactylis Glomerata L

Seed Dormancy in Dactylis Glomerata L. 1

Crop Science ◽  
1963 ◽  
Vol 3 (1) ◽  
pp. 17-19 ◽  
Author(s):  
C. L. Canode ◽  
E. V. Horning ◽  
J. D. Maguire
Keyword(s):  
Seed Dormancy ◽  
Dactylis Glomerata ◽  
Dactylis Glomerata L
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