Abstract
In order to investigate the effects of soil Cr concentration on growth and development and yield formation of rice crops, pot experiment was conducted in 2003, using the japonica cultivar Wuxiangjing 14. Results showed that: ①With the increasing of soil Cr concentration, leaf numbers and plant height were reduced, heading stage was postponed. The initiative soil Cr concentration under conditions in this experiment, that had significant effects on leaf numbers, plant height and heading stage, were 1 000, 600, 300 mg· kg-1, respectively. ② With increasing of soil Cr concentration, grain yield decreased significantly (r=-0. 998 ).③The main reason for the decrease of the yield under Cr treatments was the decrease of spikelet number per panicle and 1 000-grain weight, while no significant changes of panicle number and fulfilled grain percentage were detected. ④The decrease of spikelet number per panicle due to higher soil Cr concentration was chiefly caused by the decrease of dry matter (DM) weight per stem at heading stage, while the ratio of survived spikelets to DM at heading stage under soil Cr stress was increased.⑤Total biomass decreased significantly with increasing of soil Cr concentration, while economic coefficient showed no significant change. The decrease of total biomass due to higher soil Cr concentration was mainly related to the decrease of DM production at early growth stages of rice.
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Claims 10
Claim · model-written summary
Increasing soil Cr reduced rice leaf number.
- Taxon
- rice
Oryza sativat0 - Treatment
- soil Cr concentratione0
- Outcome
- leaf numberse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the increasing of soil Cr concentration, leaf numbers and plant height were reduced, heading stage was postponed.”
t0“rice”
Claim · model-written summary
Increasing soil Cr reduced rice plant height.
- Taxon
- riceOryza sativat0
- Treatment
- soil Cr concentratione0
- Outcome
- plant heighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the increasing of soil Cr concentration, leaf numbers and plant height were reduced, heading stage was postponed.”
t0“rice”
Claim · model-written summary
Increasing soil Cr postponed heading.
- Taxon
- riceOryza sativat0
- Treatment
- soil Cr concentratione0
- Outcome
- heading stagee0
- Direction
- postponede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the increasing of soil Cr concentration, leaf numbers and plant height were reduced, heading stage was postponed.”
t0“rice”
Claim · model-written summary
Increasing soil Cr significantly decreased grain yield.
- Taxon
- riceOryza sativat0
- Treatment
- soil Cr concentratione0
- Outcome
- grain yielde0
- Direction
- decreasede0
- Value
- r=-0. 998e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing of soil Cr concentration, grain yield decreased significantly (r=-0. 998 ).”
t0“rice”
Claim · model-written summary
Cr treatments decreased spikelet number per panicle.
- Taxon
- riceOryza sativat0
- Treatment
- Cr treatmentse0
- Outcome
- spikelet number per paniclee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The main reason for the decrease of the yield under Cr treatments was the decrease of spikelet number per panicle and 1 000-grain weight”
t0“rice”
Claim · model-written summary
Cr treatments decreased thousand grain weight.
- Taxon
- riceOryza sativat0
- Treatment
- Cr treatmentse0
- Outcome
- 1 000-grain weighte0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The main reason for the decrease of the yield under Cr treatments was the decrease of spikelet number per panicle and 1 000-grain weight”
t0“rice”
Claim · model-written summary
Higher soil Cr decreased dry matter weight per stem at heading.
- Taxon
- riceOryza sativat0
- Treatment
- soil Cr concentratione0
- Outcome
- dry matter (DM) weight per steme0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decrease of spikelet number per panicle due to higher soil Cr concentration was chiefly caused by the decrease of dry matter (DM) weight per stem at heading stage”
t0“rice”
Claim · model-written summary
Total biomass decreased significantly with increasing soil Cr.
- Taxon
- riceOryza sativat0
- Outcome
- Total biomasse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total biomass decreased significantly with increasing of soil Cr concentration”
t0“rice”
Claim · model-written summary
Panicle number and filled grain percentage showed no significant change.
- Taxon
- riceOryza sativat0
- Outcome
- panicle number and fulfilled grain percentagee0
- Direction
- no significant changese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while no significant changes of panicle number and fulfilled grain percentage were detected.”
t0“rice”
Claim · model-written summary
Economic coefficient showed no significant change.
- Taxon
- riceOryza sativat0
- Outcome
- economic coefficiente0
- Direction
- no significant changee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“economic coefficient showed no significant change.”
t0“rice”
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See all 11 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.