Abstract
This study aimed to analyze the impact of ryegrass as a soil cover on soil moisture level, initial rice establishment, grain yield and weed control in irrigated rice planted after ryegrass. The experiment was conducted under field conditions in randomized blocks design with four replications. Ryegrass (cv. BRS Ponteio) was planted in autumn and glyphosate was used as a knockdown before rice planting. Ryegrass plants were cut at 0, 0.15, 0.30 or 0.45 m above ground, resulting in different mulching levels. Rice (cv. Irga 424 CL) was planted in spring and was managed according to local crop recommendations. Although positive to the overall cropping system, ryegrass mulching suppressed rice emergence, especially with ryegrass cutting heights above 0.30 m, thus increased seeding densities in rice fields with substantial ryegrass soil cover may be needed. Ryegrass mulching had no significant effect on weed suppression, with positive results being observed only with ≥ 3000 kg ha 1 of ryegrass dry mass mulching. However, the rice yield in relation to the bare soil treatment was 14.3% less when straw quantity was 4500kg ha-1, reinforcing the need for evaluating the benefits and costs of ryegrass as a cover crop in rice production
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Claims 5
Claim · model-written summary
Ryegrass mulching suppressed rice emergence, especially at cutting heights above 0.30 m.
- Taxon
- rice
Oryza sativae0 - Material
- Irga 424 CLe6
- Treatment
- ryegrass mulchinge0
- Outcome
- rice emergencee0
- Direction
- suppressede0
- Qualifier
- especially with ryegrass cutting heights above 0.30 me0
- Setting
- field conditionse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass mulching suppressed rice emergence, especially with ryegrass cutting heights above 0.30 m”
e5“The experiment was conducted under field conditions”
e6“Rice (cv. Irga 424 CL) was planted in spring”
Claim · model-written summary
Increased seeding densities may be needed in rice fields with substantial ryegrass soil cover.
- Taxon
- riceOryza sativae1
- Treatment
- substantial ryegrass soil covere1
- Outcome
- increased seeding densitiese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“thus increased seeding densities in rice fields with substantial ryegrass soil cover may be needed”
Claim · model-written summary
Ryegrass mulching had no significant effect on weed suppression in rice.
- Taxon
- riceOryza sativae0
- Treatment
- ryegrass mulchinge2
- Interactor
- weede2weed
- Outcome
- weed suppressione2
- Direction
- no significant effecte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass mulching suppressed rice emergence, especially with ryegrass cutting heights above 0.30 m”
e2“Ryegrass mulching had no significant effect on weed suppression”
Claim · model-written summary
Weed suppression was positive only with at least 3000 kg ha-1 of ryegrass dry mass mulching.
- Taxon
- riceOryza sativae0
- Treatment
- ryegrass dry mass mulchinge3
- Interactor
- weede3weed
- Outcome
- weed suppressione3
- Direction
- positive resultse3
- Qualifier
- ≥ 3000 kg ha 1e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass mulching suppressed rice emergence, especially with ryegrass cutting heights above 0.30 m”
e3“Ryegrass mulching had no significant effect on weed suppression, with positive results being observed only with ≥ 3000 kg ha 1 of ryegrass dry mass mulching”
Claim · model-written summary
Rice yield was 14.3% less than bare soil when straw quantity was 4500 kg ha-1.
- Taxon
- riceOryza sativae4
- Treatment
- straw quantity was 4500kg ha-1e4
- Outcome
- rice yielde4
- Direction
- lesse4
- Value
- 14.3%e4
- Comparator
- bare soil treatmente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“the rice yield in relation to the bare soil treatment was 14.3% less when straw quantity was 4500kg ha-1”
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See all 46 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.