Abstract
Purpose. To evaluate the symbiotic parameters of winter pea sowings depending on nitrogen fertilization and seed inoculation in the Right Bank Forest Steppe of Ukraine. Methods. The research was carried out at the Agronomic Research Station of the National University of Bioresources and Nature Management of Ukraine (Kyiv region) in 2019–2021. Winter pea variety ‘NS Moroz’ was grown in a two-factor field experiment with the following treatments: seed inoculation (control – without inoculation) with inoculant Optimize Pulse and application of different doses of nitrogen fertilizers in the main (autumn) fertilization + foliar application at the beginning of vegetation (N0 – control, N15 + N15, N15 + N30, N15 + N45, N30 + N0, N30 + N15, N30 + N30, N45 + N0, N45 + N15, N60 + N0). The rest of the elements of agricultural technology were conventional. Results. Seed inoculation with Optimize Pulse seeds revealed a positive effect on the formation of colonies of nodule bacteria. At the same time, fertilization treatment with minimal nitrogen (N15) dose at the main fertilization was more efficient in terms of impact on the symbiotic properties of plants. As the dose of the main fertilizer increased, both the total number of nodules on the root system of plants and their mass decreased. It was established that the seed inoculation factor determined the number of active nodule bacteria in the budding stage of pea by 35%; weather conditions and main fertilization had approximately the same share of influence – 29 and 28%, respectively. At the same time, foliar application of fertilizers did not significantly affect the number of active nodule bacteria. Conclusions. As the dose of base fertilizer increased, both the number and mass of active colonies of nodule bacteria decreased as the dose of nitrogen fertilizers increased. The obtained dependency for the number of nodules can be described by the equation y = −0.1799x + 24.592, and for their mass y = −1.6817x + 258.17. Given the linearity of the reduction of these indicators. Obtained equations can be used to accurately predict the state of the symbiotic apparatus of plants in the case of application of doses of nitrogen fertilizers different from those studied in the experiment. Regarding the regularities of the formation of symbiotic potential depending on nitrogen fertilization, the best treatments for both general and active potential were the application of the main fertilizer at a dose of N15 followed by later application of N30–45.
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Claims 13
Claim · model-written summary
Optimize Pulse seed inoculation promoted nodule-bacterial colonies.
- Taxon
- winter pea
Lathyrus oleraceust0 - Treatment
- Seed inoculation with Optimize Pulse seedse0
- Interactor
- nodule bacteriae0symbiont
- Outcome
- formation of colonies of nodule bacteriae0
- Direction
- positive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“Seed inoculation with Optimize Pulse seeds revealed a positive effect on the formation of colonies of nodule bacteria”
Claim · model-written summary
Minimal N15 main fertilization was more efficient for winter pea symbiotic properties.
- Taxon
- winter peaLathyrus oleraceust0
- Treatment
- minimal nitrogen (N15) dose at the main fertilizatione0
- Outcome
- symbiotic properties of plantse0
- Direction
- more efficiente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“fertilization treatment with minimal nitrogen (N15) dose at the main fertilization was more efficient in terms of impact on the symbiotic properties of plants”
Claim · model-written summary
Higher main fertilizer doses decreased total root nodule number.
- Taxon
- winter peaLathyrus oleraceust0
- Treatment
- dose of the main fertilizere0
- Outcome
- total number of nodules on the root system of plantse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“As the dose of the main fertilizer increased, both the total number of nodules on the root system of plants and their mass decreased”
Claim · model-written summary
Higher main fertilizer doses decreased root nodule mass.
- Taxon
- winter peaLathyrus oleraceust0
- Treatment
- dose of the main fertilizere0
- Outcome
- their masse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“As the dose of the main fertilizer increased, both the total number of nodules on the root system of plants and their mass decreased”
Claim · model-written summary
Seed inoculation accounted for 35% of variation in active nodule bacteria at budding.
- Taxon
- winter peaLathyrus oleraceust0
- Organ / stage
- budding stagee0
- Treatment
- seed inoculation factore0
- Interactor
- nodule bacteriae0symbiont
- Outcome
- number of active nodule bacteriae0
- Value
- 35%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“seed inoculation factor determined the number of active nodule bacteria in the budding stage of pea by 35%”
Claim · model-written summary
Weather conditions accounted for 29% of influence on active nodule bacteria.
- Taxon
- winter peaLathyrus oleraceust0
- Treatment
- weather conditionse0
- Interactor
- nodule bacteriae1symbiont
- Outcome
- number of active nodule bacteriae1
- Value
- 29e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“weather conditions and main fertilization had approximately the same share of influence – 29 and 28%, respectively”
e1“number of active nodule bacteria in the budding stage of pea”
Claim · model-written summary
Main fertilization accounted for 28% of influence on active nodule bacteria.
- Taxon
- winter peaLathyrus oleraceust0
- Treatment
- main fertilizatione0
- Interactor
- nodule bacteriae1symbiont
- Outcome
- number of active nodule bacteriae1
- Value
- 28%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“weather conditions and main fertilization had approximately the same share of influence – 29 and 28%, respectively”
e1“number of active nodule bacteria in the budding stage of pea”
Claim · model-written summary
Foliar fertilization did not significantly affect active nodule-bacterial number.
- Taxon
- winter peaLathyrus oleraceust0
- Treatment
- foliar application of fertilizerse0
- Interactor
- nodule bacteriae0symbiont
- Outcome
- number of active nodule bacteriae0
- Direction
- did not significantly affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“foliar application of fertilizers did not significantly affect the number of active nodule bacteria”
Claim · model-written summary
Increasing base fertilizer doses reduced active nodule-bacterial colony number.
- Taxon
- winter peaLathyrus oleraceust0
- Treatment
- dose of base fertilizere0
- Interactor
- nodule bacteriae0symbiont
- Outcome
- number and mass of active colonies of nodule bacteriae0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“As the dose of base fertilizer increased, both the number and mass of active colonies of nodule bacteria decreased”
Claim · model-written summary
Increasing base fertilizer doses reduced active nodule-bacterial colony mass.
- Taxon
- winter peaLathyrus oleraceust0
- Treatment
- dose of base fertilizere0
- Interactor
- nodule bacteriae0symbiont
- Outcome
- mass of active colonies of nodule bacteriae0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“As the dose of base fertilizer increased, both the number and mass of active colonies of nodule bacteria decreased”
Claim · model-written summary
The reported linear equation described nodule number versus nitrogen dose.
- Taxon
- winter peaLathyrus oleraceust0
- Outcome
- number of nodulese0
- Value
- y = −0.1799x + 24.592e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“the number of nodules can be described by the equation y = −0.1799x + 24.592”
Claim · model-written summary
The reported linear equation described nodule mass versus nitrogen dose.
- Taxon
- winter peaLathyrus oleraceust0
- Outcome
- their masse0
- Value
- y = −1.6817x + 258.17e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“for their mass y = −1.6817x + 258.17”
e1“the number and mass of active colonies of nodule bacteria”
Claim · model-written summary
N15 main fertilization followed by N30–45 was best for general and active symbiotic potential.
- Taxon
- winter peaLathyrus oleraceust0
- Treatment
- application of the main fertilizer at a dose of N15 followed by later application of N30–45e0
- Outcome
- general and active potentiale0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter pea”
e0“the best treatments for both general and active potential were the application of the main fertilizer at a dose of N15 followed by later application of N30–45”
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