Claim · model-written summary
Decrease in rice yield under no-tillage is suggested to be affected by missing and floating hills, paddy soil phase ratio, dissolved oxygen, and shoot and root dry weight.
- Taxon
- Rice
Oryza sativat0 - Outcome
- rice yielde1
- Qualifier
- missing and floating hill, solid and gaseous phase ratio of paddy soil, dissolved oxygen, shoot dry weight, and root dry weighte1
Verbatim
t0“Rice Transplanted with 10-Day-Old Seedlings”
e1“There are factors in reducing rice yield in no-tillage cultivation such as missing and floating hill, solid and gaseous phase ratio of paddy soil, dissolved oxygen, shoot dry weight, and root dry weight”
Title
Yong In Kuk; Oh-Do Kwon; Il-Bin Im Korean Journal of Weed Science 2002
Other claims from this paper (13)
- Observation Seven weed species emerged in tillage paddy fields.
- Observation Nine weed species occurred in no-tillage paddy fields.
- Association Shoot dry weight of weed species tended to increase as years of cultivation increased.
- Association Annual weeds occurred with much greater frequency than perennial weeds in paddy fields under both tillage and no-tillage.
- Observation Aneilema keisak and Eleocharis kuroguwai were the dominant weeds in no-tillage paddy fields.
- Observation Echinochloa crus-galli and Eleocharis kuroguwai dominated in tillage paddy fields.
- Intervention effect Plant height, number of tillers and shoot dry weight of rice were much lower under no-tillage than tillage, decreasing conspicuously 20 days after transplanting.
- Intervention effect Root dry weight of rice was much lower under no-tillage than tillage.
- Intervention effect Rice under no-tillage had fewer panicles per m2 than under tillage.
- Observation Ripening rate, 1,000-grain weight and number of spikelets per panicle of rice showed no difference between no-tillage and tillage.
- Intervention effect Rice under no-tillage exhibited an 8-13% lower yield than under tillage.
- Association Yield declined linearly with duration of no-tillage cultivation (y = -19.3x + 518.5, r = 0.746) for 10-day-old seedlings.
- Recommendation A critical year limit for no-tillage rice cultivation was found to be 2 years for 10-day-old seedlings.