scholarly journals Plant communities of the cultivated fields of the Podlaski Przełom Bugu mesoregion. Part 1. Cereal communities

2012 ◽  
Vol 58 (1) ◽  
pp. 255-290
Author(s):  
Janina Skrzyczyńska ◽  
Zofia Rzymowska
Keyword(s):  
Plant Communities ◽  
Agricultural Region ◽  
Large Soil ◽  
Extensive Agriculture

Characteristic of plant communities developing in the cereal cultivations of the Podlaski Przełom Bugu mesoregion is presented in the paper. This agricultural region is partially situated in the borders of the ,,Podlaski Przełom Bugu" Landscape Park. Extensive agriculture as well as large soil and microclimatic diversity resulted in occurrence of rich, floristically differentiated agrocoenoses. Three associations from the alliance <i>Aperion spicae</i>-<i>venti</i> were noted in the studied area. Association <i>Vicietum tetraspermae</i> was the most common and inner differentiated. Four subassociations: <i>Vicietum tetraspermae scleranthetosum</i>, <i>Vicietum tetraspermae myosotidetosum</i>, <i>Vicietum tetraspermae typicum</i>, <i>Vicietum tetraspermae consolidetosum</i> and 18 lower syntaxonomic units were distinguished. Plots of <i>Papaveretum argemones</i>, differentiated into 3 subassociations: <i>Papaveretum argemones scleranthetosum</i>, <i>Papaveretum argemones typicum</i> and <i>Papaveretum argemones consolidetosum</i> were noted seldom in the studied area. In the central part of the Podlaski Przełom Bugu mesoregion occurrence of a single plots of <i>Arnoserido</i>-<i>Scleranthetum</i> was noted.

Weed plant communities of orchards in Siwa Oasis, Egypt

1994 ◽  
Vol 105 (5-6) ◽  
pp. 387-398
Author(s):  
M. M. Abd El-Ghani
Keyword(s):  
Plant Communities ◽  
Weed Plant

Temporal dynamics of mycorrhizal fungal communities and co-associations with grassland plant communities following experimental manipulation of rainfall

2019 ◽  
Author(s):  
Coline Deveautour ◽  
Sally Power ◽  
Kirk Barnett ◽  
Raul Ochoa-Hueso ◽  
Suzanne Donn ◽  
...  
Keyword(s):  
Community Composition ◽  
Plant Community ◽  
Plant Communities ◽  
Fungal Community ◽  
Mycorrhizal Fungi ◽  
Temporal Dynamics ◽  
Arbuscular Mycorrhizal ◽  
Fungal Communities ◽  
Plant Responses ◽  
Rainfall Regimes

Climate models project overall a reduction in rainfall amounts and shifts in the timing of rainfall events in mid-latitudes and sub-tropical dry regions, which threatens the productivity and diversity of grasslands. Arbuscular mycorrhizal fungi may help plants to cope with expected changes but may also be impacted by changing rainfall, either via the direct effects of low soil moisture on survival and function or indirectly via changes in the plant community. In an Australian mesic grassland (former pasture) system, we characterised plant and arbuscular mycorrhizal (AM) fungal communities every six months for nearly four years to two altered rainfall regimes: i) ambient, ii) rainfall reduced by 50% relative to ambient over the entire year and iii) total summer rainfall exclusion. Using Illumina sequencing, we assessed the response of AM fungal communities sampled from contrasting rainfall treatments and evaluated whether variation in AM fungal communities was associated with variation in plant community richness and composition. We found that rainfall reduction influenced the fungal communities, with the nature of the response depending on the type of manipulation, but that consistent results were only observed after more than two years of rainfall manipulation. We observed significant co-associations between plant and AM fungal communities on multiple dates. Predictive co-correspondence analyses indicated more support for the hypothesis that fungal community composition influenced plant community composition than vice versa. However, we found no evidence that altered rainfall regimes were leading to distinct co-associations between plants and AM fungi. Overall, our results provide evidence that grassland plant communities are intricately tied to variation in AM fungal communities. However, in this system, plant responses to climate change may not be directly related to impacts of altered rainfall regimes on AM fungal communities. Our study shows that AM fungal communities respond to changes in rainfall but that this effect was not immediate. The AM fungal community may influence the composition of the plant community. However, our results suggest that plant responses to altered rainfall regimes at our site may not be resulting via changes in the AM fungal communities.

Methods for saving the productivity of slope lands

2020 ◽  
Author(s):  
N.A. Batyakhina N.A. ◽  
Keyword(s):  
Forest Soil ◽  
Crop Rotation ◽  
Plant Communities ◽  
Crop Production ◽  
Phosphorus Content ◽  
Gray Forest Soil ◽  
Conservation Tillage ◽  
Multicomponent Mixtures

The influence of various annual multicomponent mixtures in the crop rotation link on its productivity and fertility of gray forest soil is shown. The complexity of the structure of plant communities has reduced the share of weeds in crop production annual mix, 2.6-3.7% and conservation tillage for wheat has increased by 2.5 times the phosphorus content is 1.9 times the potassium, 12% increased productivity.

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