Agrophytocenotic relationships of cultivated and weed plants at the level of competition and allelopathy
Olga Vlasova 1, D  
,   Vjera M. Perederieva 1, B
,   Olga G. Shabaldas 1, A
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Ministry of Agriculture, Stavropol State Agrarian University, Russia
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
Olga Vlasova   

Ministry of Agriculture, Stavropol State Agrarian University, Russia
Submission date: 2021-05-18
Acceptance date: 2021-08-24
Online publication date: 2021-09-08
As a result of this research it was found that on average rotational crops remove 103.6 kg/ha of nitrogen, 51.5 kg/ha of phosphorus, and 96.9 kg/ha of potassium. The main species of weeds of field crops remove 124.1, 12.9 and 18.9 kg/ha of nitrogen, phosphorus and potassium, respectively, mainly due to such species as Lolium temulentum L., Galium aparine L., Cirsium arvense L., Ambrosia artemisifolia L. and Chorispora tenella (Pall.) DC. At the same time most of the studied species of weeds have high allelopathic activity. Particular attention should be paid to Lolium temulentum L., since its grains have the fungus Stromatinia temulenta, which produces the alkaloid temulin. In high concentrations it has an inhibitory effect on the germination of test-culture seeds. Thus, the growth index at the concentration of the tested solution 1:50 is 0.34, and at 5:50 – 0.16; similar indices were found under the action of Centaurea cyanus L. and Taraxacum officinale L. This research suggests that winter wheat agrocenoses contains both allelopathically active species and species to which the plants are tolerant. This is of practical value since it allows a differentiated approach to the system of integrated weed control measures, in particular to the choice of herbicides aimed at destroying allelopathic active weed species. This study was aimed to study the relationships between cultivated and weed plants at the level of competition and allelopathy.
The research work was conducted with the support of international grants: Tempus 159311- Tempus-1-2009-IT-JPCR "Network for master training in technologies of water resources management - net water" "Net waterr: net water training in technologies of water resources management" Tempus Tacis Project, SARUD 561969-EPP-1-2015-1-DE-EPPKA2-CBHE-JP 15. 10.2015 -14.10.2018 Sustainable agriculture rural development.
Tomasz Sekutowski
The authors have declared that no conflict of interests exist.