Claim · model-written summary
Direct seeded bed rice yield relative to puddled transplanted rice declined as beds aged.
- Taxon
- rice
Oryza sativae1 - Outcome
- Yield of DSRB relative to yield of PTRe0
- Direction
- declinede0
- Setting
- bedse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of DSRB relative to yield of PTR declined as the beds aged”
e1“direct-seeded rice on permanent beds (DSRB)”
Title
E. Humphreys; Atul Nayyar; Jagadish Timsina 2008
Other claims from this paper (19)
- Intervention effect Rice yield rose significantly with nitrogen up to 160 kg N per hectare.
- Intervention effect Puddled transplanted rice exceeded other methods for biomass, yield and nitrogen use efficiency.
- Intervention effect Transplanted rice on permanent beds yielded 29% less than puddled transplanted rice at 120 kg N per hectare.
- Intervention effect Direct seeded rice on permanent beds yielded 44% less than transplanted rice on permanent beds.
- Intervention effect Wheat straw mulch lowered direct seeded rice bed yield by 26% on average.
- Intervention effect Mulching did not affect transplanted rice bed yield.
- Observation Dry seeded rice on flats and beds developed severe iron deficiency.
- Observation Dry seeded rice on flats and beds was prone to root nematode infestation.
- Association Transplanted bed rice relative yield showed no trend as beds aged.
- Observation Fertilizer nitrogen recovery was 30% in puddled transplanted rice.
- Observation Fertilizer nitrogen recovery was 14% in transplanted bed rice.
- Observation Fertilizer nitrogen recovery was 17% in direct seeded bed rice.
- Observation Soil supplied most crop nitrogen uptake despite urea application.
- Observation Total urea nitrogen losses were 52% to 60% in transplanted and direct seeded bed rice.
- Intervention effect Wheat yield rose with nitrogen through 120 kg per hectare and sometimes to 160.
- Intervention effect Permanent bed wheat yielded 75–96% of conventionally tilled wheat, without an age trend.
- Intervention effect Conventional and direct drilled wheat on flats had similar yield.
- Observation Wheat nitrogen recovery was similar among flat and bed treatments, and straw mulch did not affect yield or efficiency.
- Observation Applied nitrogen recovery in wheat was 27–38% in plants and 45–59% in soil.