Abstract
The effects of soil compaction under water deficit conditions during the reproductive stage on the grain yield of rice were examined with various cultivar s. In a field experiment, three rice cultivar s were grown in compacted and non-compacted upland conditions and irrigation was terminated at the early reproductive stage. The grain yield and total dry weight (DW) at maturity was similarly reduced by soil compaction regardless of the rank of the cultivars in drought resistance. However, the yield was superior in the cultivars that showed higher yield and DW under non-compacted conditions. In greenhouse experiments, six rice cultivars were grown in the pot of 1.0 meter in depth containing soil at three levels of soil bulk density (SBD), and water supply was reduced by lowering the water table during the reproductive stage. The effects of SBD on DW and grain yield were similar among six cultivars. In both field and pot experiments the yield reduction was predominantly caused by a smaller number of spikelets, with greater reduction of DW than the reduction of harvest index. We concluded that soil compaction reduced rice grain yield by decreasing the number of fertile spikelet that was mainly caused by the suppression of DW and partly by sterility due to water deficit regardless of cultivar. There was no clear difference among the cultivars in the yield response to soil compaction, but the local drought-resistant cultivars, which showed a relatively superior yield and DW under the non-compacted upland condition, showed a higher yield even on compacted soil.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Soil compaction reduced grain yield and total dry weight similarly across rice cultivars.
- Taxon
- cultivarse0
- Organ / stage
- maturitye0
- Treatment
- soil compactione0
- Outcome
- grain yield and total dry weight (DW)e0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“The grain yield and total dry weight (DW) at maturity was similarly reduced by soil compaction regardless of the rank of the cultivars in drought resistance.”
Claim · model-written summary
Cultivars with higher yield and dry weight on non-compacted soil retained superior yield.
- Taxon
- Rice
Oryza sativat0 - Material
- cultivarse0
- Outcome
- yielde0
- Direction
- superiore0
- Comparator
- non-compacted conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield was superior in the cultivars that showed higher yield and DW under non-compacted conditions.”
t0“Rice”
Claim · model-written summary
Soil bulk density effects on dry weight and grain yield were similar among six rice cultivars.
- Taxon
- RiceOryza sativat0
- Material
- six cultivarse0
- Outcome
- DW and grain yielde0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of SBD on DW and grain yield were similar among six cultivars.”
t0“Rice”
Claim · model-written summary
Yield reduction under compaction was predominantly associated with fewer spikelets.
- Taxon
- RiceOryza sativat0
- Organ / stage
- spikeletse0
- Outcome
- yield reductione0
- Qualifier
- smaller number of spikeletse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield reduction was predominantly caused by a smaller number of spikelets”
t0“Rice”
Claim · model-written summary
Dry weight declined more than harvest index in field and pot experiments.
- Taxon
- RiceOryza sativat0
- Outcome
- DWe0
- Direction
- greater reductione0
- Comparator
- harvest indexe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with greater reduction of DW than the reduction of harvest index.”
t0“Rice”
Claim · model-written summary
The authors attributed compaction-related yield loss chiefly to suppressed dry weight and partly to water-deficit sterility.
- Taxon
- riceOryza sativae0
- Organ / stage
- fertile spikelete0
- Treatment
- soil compactione0
- Outcome
- grain yielde0
- Qualifier
- suppression of DW and partly by sterility due to water deficite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil compaction reduced rice grain yield by decreasing the number of fertile spikelet that was mainly caused by the suppression of DW and partly by sterility due to water deficit regardless of cultivar.”
Claim · model-written summary
Rice cultivars showed no clear difference in yield response to soil compaction.
- Taxon
- RiceOryza sativat0
- Material
- cultivarse0
- Outcome
- yield response to soil compactione0
- Direction
- no clear differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no clear difference among the cultivars in the yield response to soil compaction”
t0“Rice”
Claim · model-written summary
Local drought-resistant cultivars with superior yield on non-compacted soil also yielded more on compacted soil.
Verbatim
e0“the local drought-resistant cultivars, which showed a relatively superior yield and DW under the non-compacted upland condition, showed a higher yield even on compacted soil.”
The same questions in other papers
tillage · growth · Oryza sativa (rice)Positive and negative results
32 papers in the same direction as this paper · 116 in the opposite direction
- positive
- positive
- positive
145 papers more in this group
See all 149 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.