Abstract
Abstract In Madagascar, upland rainfed rice is traditionally grown on tilled soil without transplanting. Weed infestation by annual species is a serious issue in such a system. Stylosanthes guianensis , a legume cover crop, can be grown with rice as a living mulch but its effect on the weed community and rice yield was not yet well studied. Therefore, a field experiment was conducted in Mid‐West Madagascar from 2016 to 2018. A no‐till system with stylosanthes (NT) managed as a living mulch was compared to the conventional tilled (CT) system. Two fertilisation regimes were included: organic manure (F1) and organic manure combined with mineral fertiliser (F2). Weed floristic surveys were performed, and weed harmfulness evaluated by comparing weedy and weed‐free plots. The living mulch harmfulness was evaluated using weed‐stylosanthes‐free plots. Results showed that NT suppressed dominant grass weeds Digitaria spp. and Eleusine indica leading to a decrease in total weed biomass. Rice yield was significantly higher in NT than in CT; in weed‐free condition, it was 2.4 versus 2 t ha −1 in NT and CT, respectively, and 1.5 versus 0.6 t ha −1 in NT and CT, respectively, in weedy condition. The living mulch reduced rice yield by 14% but it remained significantly higher in NT than in CT. The addition of mineral fertiliser to the organic manure had a positive effect on rice yield but only in weed‐free conditions. This study showed that a no‐till system with a living mulch can help to control the most competitive weeds without undermining rice production.
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Claims 9
Claim · model-written summary
No-till with stylosanthes living mulch suppressed the dominant grass weed Digitaria spp.
- Taxon
- upland rainfed ricet0
- Treatment
- NTe0
- Interactor
- Digitaria spp.e0weed
- Outcome
- dominant grass weeds Digitaria spp.e0
- Direction
- suppressede0
- Setting
- Madagascart0
Not reportedComparator
Verbatim
t0“upland rainfed rice in Madagascar”
e0“NT suppressed dominant grass weeds Digitaria spp.”
Claim · model-written summary
No-till with stylosanthes living mulch suppressed the dominant grass weed Eleusine indica.
- Taxon
- upland rainfed ricet0
- Treatment
- NTe0
- Interactor
- Eleusine indica
Eleusine indicae0weed - Outcome
- Eleusine indicae0
- Direction
- suppressede0
- Setting
- Madagascart0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rainfed rice in Madagascar”
e0“NT suppressed dominant grass weeds Digitaria spp. and Eleusine indica”
Claim · model-written summary
Suppression of dominant grass weeds under no-till led to a decrease in total weed biomass.
- Taxon
- upland rainfed ricet0
- Treatment
- NTe0
- Outcome
- total weed biomasse0
- Direction
- decreasee0
- Setting
- Madagascart0
Not reportedComparator
Verbatim
t0“upland rainfed rice in Madagascar”
e0“NT suppressed dominant grass weeds Digitaria spp. and Eleusine indica leading to a decrease in total weed biomass”
Claim · model-written summary
Rice yield was significantly higher in no-till than in conventional tillage.
Verbatim
t0“upland rainfed rice in Madagascar”
e0“Rice yield was significantly higher in NT than in CT”
Claim · model-written summary
In weed-free conditions rice yield was 2.4 t/ha under no-till versus 2 t/ha under conventional tillage.
Verbatim
t0“upland rainfed rice in Madagascar”
e0“in weed‐free condition, it was 2.4 versus 2 t ha −1 in NT and CT, respectively”
Claim · model-written summary
In weedy conditions rice yield was 1.5 t/ha under no-till versus 0.6 t/ha under conventional tillage.
Verbatim
t0“upland rainfed rice in Madagascar”
e0“and 1.5 versus 0.6 t ha −1 in NT and CT, respectively, in weedy condition”
Claim · model-written summary
The living mulch reduced rice yield by 14%, but yield remained significantly higher in no-till than in conventional tillage.
- Taxon
- upland rainfed ricet0
- Treatment
- The living mulche0
- Outcome
- rice yielde0
- Direction
- reducede0
- Value
- 14%e0
- Setting
- Madagascart0
Not reportedComparator
Verbatim
t0“upland rainfed rice in Madagascar”
e0“The living mulch reduced rice yield by 14%”
Claim · model-written summary
Adding mineral fertiliser to organic manure had a positive effect on rice yield, but only in weed-free conditions.
- Taxon
- upland rainfed ricet0
- Treatment
- addition of mineral fertiliser to the organic manuree0
- Outcome
- rice yielde0
- Direction
- positive effecte0
- Qualifier
- only in weed‐free conditionse0
- Setting
- Madagascart0
Not reportedComparator
Verbatim
t0“upland rainfed rice in Madagascar”
e0“The addition of mineral fertiliser to the organic manure had a positive effect on rice yield but only in weed‐free conditions”
Claim · model-written summary
The authors conclude that a no-till system with a living mulch can help control the most competitive weeds without undermining rice production.
Verbatim
t0“upland rainfed rice in Madagascar”
e0“a no‐till system with a living mulch can help to control the most competitive weeds without undermining rice production”
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