Abstract
The sustainability of rice production in traditional ways under intensive puddled condition is increasingly threatened due to fresh water scarcity and soil degradation by intensive puddling in many areas. Repeatedly imposing wetting and drying cycle and conservation tillage can improve soil physical environment and root growth. This study investigated the combined impacts of alternate wetting and drying (AWD) irrigation and reduced tillage on the physico-chemical properties, root growth dynamics and yield of rice. A field experiment was conducted with two water regimes- continuously flooded (CF) and AWD; and three tillage intensities- conventional, reduced and zero tillage. A rice variety BRRI Dhan 87 was grown. Different root parameters and yield parameters were measured. Soil physical changes and nutrient availability were determined. The root length (20%), root dry mass (70%) and yield (20%) were significantly greater in reduced tillage compared to zero tillage. However, there was no yield difference in conventional and reduced tillage. The penetration resistance of soil was not differed between AWD and CF treatment with similar yield. The nitrogen content in soil (0.30%) and plant (2.93%) was greater in AWD fields with reduced tillage than CF system. The results of this study suggested that combination of AWD and reduced tillage improved soil structure and nutrient availability which positively influenced yield of rice.
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Claims 8
Claim · model-written summary
Reduced tillage increased rice root length by 20% versus zero tillage.
- Taxon
- rice
Oryza sativat0 - Treatment
- reduced tillagee0
- Outcome
- root lengthe0
- Direction
- greatere0
- Value
- 20%e0
- Comparator
- zero tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root length (20%), root dry mass (70%) and yield (20%) were significantly greater in reduced tillage compared to zero tillage”
t0“rice”
Claim · model-written summary
Reduced tillage increased rice root dry mass by 70% versus zero tillage.
- Taxon
- riceOryza sativat0
- Treatment
- reduced tillagee0
- Outcome
- root dry masse0
- Direction
- greatere0
- Value
- 70%e0
- Comparator
- zero tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root length (20%), root dry mass (70%) and yield (20%) were significantly greater in reduced tillage compared to zero tillage”
t0“rice”
Claim · model-written summary
Reduced tillage increased rice yield by 20% versus zero tillage.
- Taxon
- riceOryza sativat0
- Treatment
- reduced tillagee0
- Outcome
- yielde0
- Direction
- greatere0
- Value
- 20%e0
- Comparator
- zero tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root length (20%), root dry mass (70%) and yield (20%) were significantly greater in reduced tillage compared to zero tillage”
t0“rice”
Claim · model-written summary
Rice yield did not differ between conventional and reduced tillage.
- Taxon
- riceOryza sativat0
- Treatment
- reduced tillagee0
- Outcome
- yielde0
- Direction
- no yield differencee0
- Comparator
- conventionale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no yield difference in conventional and reduced tillage”
t0“rice”
Claim · model-written summary
AWD and continuous flooding had similar rice yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AWD and CF treatment with similar yield”
t0“rice”
Claim · model-written summary
Soil penetration resistance did not differ between AWD and continuously flooded treatments.
- Taxon
- riceOryza sativat0
- Treatment
- AWDe0
- Outcome
- penetration resistance of soile0
- Direction
- not differede0
- Comparator
- CFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The penetration resistance of soil was not differed between AWD and CF treatment”
t0“rice”
Claim · model-written summary
Soil nitrogen content was greater under AWD with reduced tillage than under continuous flooding.
- Taxon
- riceOryza sativat0
- Treatment
- AWD fields with reduced tillagee0
- Outcome
- nitrogen content in soile0
- Direction
- greatere0
- Value
- 0.30%e0
- Comparator
- CF systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogen content in soil (0.30%) and plant (2.93%) was greater in AWD fields with reduced tillage than CF system”
t0“rice”
Claim · model-written summary
Plant nitrogen content was greater under AWD with reduced tillage than under continuous flooding.
- Taxon
- riceOryza sativat0
- Treatment
- AWD fields with reduced tillagee0
- Outcome
- nitrogen content in soil (0.30%) and plante0
- Direction
- greatere0
- Value
- 2.93%e0
- Comparator
- CF systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogen content in soil (0.30%) and plant (2.93%) was greater in AWD fields with reduced tillage than CF system”
t0“rice”
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