Abstract
Modern plant protection should be as environmentally friendly as possible, therefore, agrotechnical methods should form its basis. The current paper has presented the results of three-year study (2017–2019) of the effect of nitrogen fertilizers and seeding rates on the brown mustard productivity and its ability to suppress weeds. The study was carried out in the Central steppe of the Crimea on the southern low-humus blackearth (chernozem) by the researchers of the FSBSI “Research Institute of agriculture in Crimea”. The purpose of the current study was to determine the effect of nitrogen fertilizers and seeding rates on the productivity and competitiveness of brown mustard. There was found that the amount of weeds depends on the individual weediness of the field and the conditions of moisture supply of the year. By the time the mustard was harvested, the number of weeds increased by almost 1.5 times due to the emergence of new shoots of weeds during the ripening period of mustard. There has been presented the dynamics of dry weeds weight depending on the seeding rate. There has been shown that the growth and development of weeds depends on the density of the brown mustard sowings. With an increase in the seeding rate from 0.5 to 3.0 million pieces per hectare, the dry weeds weight decreased from 180.8 to 44.3 g/m 2 on average over three years. An increase in the seeding rate from 2.5 to 3.0 million pieces per hectare did not provide a significant decrease in dry weeds weight. There has been established that the optimal seeding rate for growing brown mustard in the Crimean steppe is 2.5 million pieces per hectare. At this seeding rate, mustard sowings are maximally productive (0.77 t/ha) and are characterized by a high competitive ability to weeds. There has been proven a positive effect of nitrogen fertilizers on brown mustard productivity and growth in the number of weeds. The highest mean productivity of oilseeds for three years was obtained with the application of nitrogen doses N60 and N80 and was 0.78–0.81 t/ha (on 0.28–0.31 t/ha more than that of the control). In the same variants, dry weeds weight was the highest (105.4–106.5 g/m 2 ).
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Claims 9
Claim · model-written summary
Weed numbers rose almost 1.5 times by mustard harvest.
- Taxon
- brown mustard
Brassica junceat0 - Interactor
- weedse0weed
- Outcome
- number of weedse0
- Direction
- increasede0
- Value
- almost 1.5 timese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By the time the mustard was harvested, the number of weeds increased by almost 1.5 times due to the emergence of new shoots of weeds during the ripening period of mustard”
t0“brown mustard (Brassica juncea)”
Claim · model-written summary
Higher mustard seeding density reduced dry weed weight from 180.8 to 44.3 g/m 2.
- Taxon
- brown mustardBrassica junceat0
- Treatment
- 3.0 million pieces per hectaree0
- Interactor
- weedse0weed
- Outcome
- dry weeds weighte0
- Direction
- decreasede0
- Value
- 44.3 g/m 2e0
- Comparator
- 0.5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With an increase in the seeding rate from 0.5 to 3.0 million pieces per hectare, the dry weeds weight decreased from 180.8 to 44.3 g/m 2 on average over three years”
t0“brown mustard (Brassica juncea)”
Claim · model-written summary
Raising the seeding rate from 2.5 to 3.0 million pieces per hectare did not significantly decrease dry weed weight.
- Taxon
- brown mustardBrassica junceat0
- Treatment
- 3.0 million pieces per hectaree0
- Interactor
- weedse0weed
- Outcome
- dry weeds weighte0
- Direction
- decreasee0
- Comparator
- 2.5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An increase in the seeding rate from 2.5 to 3.0 million pieces per hectare did not provide a significant decrease in dry weeds weight”
t0“brown mustard (Brassica juncea)”
Claim · model-written summary
At 2.5 million pieces per hectare, mustard productivity reached 0.77 t/ha.
- Taxon
- brown mustardBrassica junceae1
- Treatment
- 2.5 million pieces per hectaree1
- Outcome
- mustard sowings are maximally productivee0
- Direction
- maximallye0
- Value
- 0.77 t/hae0
- Setting
- Crimean steppee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At this seeding rate, mustard sowings are maximally productive (0.77 t/ha) and are characterized by a high competitive ability to weeds”
e1“optimal seeding rate for growing brown mustard in the Crimean steppe is 2.5 million pieces per hectare”
Claim · model-written summary
The authors identified 2.5 million pieces per hectare as the optimal mustard seeding rate in the Crimean steppe.
- Taxon
- brown mustardBrassica junceae0
- Outcome
- optimal seeding ratee0
- Value
- 2.5 million pieces per hectaree0
- Setting
- Crimean steppee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimal seeding rate for growing brown mustard in the Crimean steppe is 2.5 million pieces per hectare”
Claim · model-written summary
Nitrogen fertilizer increased mustard productivity.
- Taxon
- brown mustardBrassica junceae0
- Treatment
- nitrogen fertilizerse0
- Outcome
- brown mustard productivitye0
- Direction
- positive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive effect of nitrogen fertilizers on brown mustard productivity”
Claim · model-written summary
Nitrogen fertilizer increased the number of weeds.
- Taxon
- brown mustardBrassica junceae0
- Treatment
- nitrogen fertilizerse0
- Interactor
- weedse0weed
- Outcome
- number of weedse0
- Direction
- growthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive effect of nitrogen fertilizers on brown mustard productivity and growth in the number of weeds”
Claim · model-written summary
N60 and N80 produced the highest mean oilseed productivity, 0.78–0.81 t/ha.
- Taxon
- brown mustardBrassica junceat0
- Treatment
- nitrogen doses N60 and N80e0
- Outcome
- productivity of oilseedse0
- Direction
- higheste0
- Value
- 0.78–0.81 t/hae0
- Qualifier
- 0.28–0.31 t/ha more than that of the controle0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest mean productivity of oilseeds for three years was obtained with the application of nitrogen doses N60 and N80 and was 0.78–0.81 t/ha (on 0.28–0.31 t/ha more than that of the control)”
t0“brown mustard (Brassica juncea)”
Claim · model-written summary
Dry weed weight was highest under N60 and N80, at 105.4–106.5 g/m 2.
- Taxon
- brown mustardBrassica junceat0
- Treatment
- nitrogen doses N60 and N80e1
- Interactor
- weedse0weed
- Outcome
- dry weeds weighte0
- Direction
- higheste0
- Value
- 105.4–106.5 g/m 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the same variants, dry weeds weight was the highest (105.4–106.5 g/m 2 )”
e1“nitrogen doses N60 and N80”
t0“brown mustard (Brassica juncea)”
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See all 139 papers →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.