Abstract
The article presents the results of experimental studies on the effect of micro-irrigation methods (drip irrigation with the surface laying of irrigation pipelines (IP) and subsoil drip irrigation with laying of IP at a depth of 30 cm) on the species and quantitative composition of weeds. The variant with a natural moisture supply (without irrigation) served as a reference area. Field research was conducted in the period 2020-2021 on the lands of the Brylivs’ke experimental field of the Institute of Water Problems and Land Reclamation of NAAS (Dry Steppe subzone) in sunflower and chickpea crops. Monitoring of the number and species composition of weeds was carried out by applying the recording framework by the method of the Institute of Plant Protection of NAAS during the third decade of May and the third decade of August. Based on the results of experimental research, it was proved that the irrigation methods (and hence the conditions of moisture supply) reliably influenced the degree of weed development in sunflower and chickpea crops. It was specified that the implementation of subsoil drip irrigation on average over the years of research reduced the degree of weed development in sunflower and chickpea crops by 1,65 and 1,55 times, respectively, compared to the typical surface laying of drip irrigation pipelines. Ultimately, that reduced the pesticide load on the field agro-ecosystem by reducing the number of herbicide treatments of crops by an average of 33-50 %. The species composition of weeds was not significantly affected by the method of irrigation. In addition, the researchers have shown that, regardless of the irrigation method, weed development in crops significantly reduced the productivity of the investigated crops: sunflower by 18,0-21,2 % and chickpea by 27,9-29,7 %. At the same time, in non-irrigated conditions, the degree of weed development had a greater impact on crop yield; thus, yield reduction in the reference variant without irrigation was 24,6 % for sunflower and 30,0 % for chickpeas.
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Claims 8
Claim · model-written summary
Subsoil drip irrigation reduced weed development in sunflower crops 1,65 times relative to surface drip irrigation.
- Taxon
- sunflower
Helianthus annuuse0 - Treatment
- subsoil drip irrigatione0
- Interactor
- weede0weed
- Outcome
- degree of weed development in sunflowere0
- Direction
- reducede0
- Value
- 1,65e0
- Comparator
- the typical surface laying of drip irrigation pipelinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the implementation of subsoil drip irrigation on average over the years of research reduced the degree of weed development in sunflower and chickpea crops by 1,65 and 1,55 times, respectively, compared to the typical surface laying of drip irrigation pipelines”
t0“Weed development in sunflower and chickpea crops”
Claim · model-written summary
Subsoil drip irrigation reduced weed development in chickpea crops 1,55 times relative to surface drip irrigation.
- Taxon
- chickpea
Cicer arietinume0 - Treatment
- subsoil drip irrigatione0
- Interactor
- weede0weed
- Outcome
- degree of weed developmente0
- Direction
- reducede0
- Value
- 1,55 timese0
- Comparator
- the typical surface laying of drip irrigation pipelinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the implementation of subsoil drip irrigation on average over the years of research reduced the degree of weed development in sunflower and chickpea crops by 1,65 and 1,55 times, respectively, compared to the typical surface laying of drip irrigation pipelines”
t0“Weed development in sunflower and chickpea crops”
Claim · model-written summary
Reduced weed development lowered the number of herbicide treatments by 33-50 %.
- Taxon
- sunflower and chickpea cropsCicer arietinumHelianthus annuust0
- Interactor
- Weedt0weed
- Outcome
- number of herbicide treatments of cropse0
- Direction
- reducinge0
- Value
- 33-50 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that reduced the pesticide load on the field agro-ecosystem by reducing the number of herbicide treatments of crops by an average of 33-50 %”
t0“Weed development in sunflower and chickpea crops”
Claim · model-written summary
Irrigation method did not significantly affect weed species composition.
- Taxon
- sunflower and chickpea cropsCicer arietinumHelianthus annuust0
- Treatment
- method of irrigatione0
- Interactor
- weedse0weed
- Outcome
- species composition of weedse0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species composition of weeds was not significantly affected by the method of irrigation.”
t0“sunflower and chickpea crops”
Claim · model-written summary
Weeds reduced sunflower productivity by 18,0-21,2 %.
- Taxon
- sunflowerHelianthus annuuse0
- Interactor
- weede0weed
- Outcome
- productivity of the investigated cropse0
- Direction
- reducede0
- Value
- 18,0-21,2 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed development in crops significantly reduced the productivity of the investigated crops: sunflower by 18,0-21,2 % and chickpea by 27,9-29,7 %”
Claim · model-written summary
Weeds reduced chickpea productivity by 27,9-29,7 %.
- Taxon
- chickpeaCicer arietinume0
- Interactor
- weede0weed
- Outcome
- productivity of the investigated cropse0
- Direction
- reducede0
- Value
- 27,9-29,7 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed development in crops significantly reduced the productivity of the investigated crops: sunflower by 18,0-21,2 % and chickpea by 27,9-29,7 %”
Claim · model-written summary
Without irrigation, weeds reduced sunflower yield by 24,6 %.
- Taxon
- sunflowerHelianthus annuuse0
- Interactor
- Weedt0weed
- Outcome
- yield reductione0
- Direction
- reductione0
- Value
- 24,6 %e0
- Setting
- reference variant without irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield reduction in the reference variant without irrigation was 24,6 % for sunflower and 30,0 % for chickpeas”
t0“Weed development in sunflower and chickpea crops”
Claim · model-written summary
Without irrigation, weeds reduced chickpea yield by 30,0 %.
- Taxon
- chickpeasCicer arietinume0
- Interactor
- Weedt0weed
- Outcome
- yield reductione0
- Direction
- reductione0
- Value
- 30,0 %e0
- Setting
- reference variant without irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield reduction in the reference variant without irrigation was 24,6 % for sunflower and 30,0 % for chickpeas”
t0“Weed development in sunflower and chickpea crops”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.