Abstract
Taking Cd polluted reddish yellow paddy soil(RYPS) and alluvial loamy paddy soil(ALPS) as test objects,pot experiments were conducted to study the effects of different water management modes,including whole growth season flooding(WF),draining and sunning field at tillering stage(TP),draining and sunning field at milk stage(MP),draining and sunning field at tillering and milk stages(TMP),and wetting irrigation(WI),on the Cd absorption and accumulation by rice.For the two test soils,their Fe2 + content was the highest in treatment WF and the lowest in treatment TMP.Compared with TMP,treatment WF increased the Fe2 + content in ALPS by 585.4% and that in RYPS by 1316.3%.The contents of available S and available Cd in the two soils were all in the order of WF TP MP WI TMP.Comparing with TMP,treatment WF decreased the available S and available Cd contents in ALPS by 96.4% and 70.1%(P0.01),and those in RYPS by 55.5% and 54.1%(P 0.01),respectively.On the two soils,WF and MP had a relatively higher rice yield than other treatments.The Cd content in rice stem and leaf and in brown rice followed the sequence of WF MP TP WI TMP,and was decreased by 74.1% and 57.5%(P0.01) in treatment WF on ALPS,and by 55.6% and 43.6%(P0.01) in treatment WF on RYPS,respectively,compared with those in treatment TMP.Besides the available Cd content of the two soils,water management modes also played important roles in the Cd absorption and accumulation by rice via affecting the soil Fe2 + and available S contents,with the effects being significantly larger on soil available S than on soil Fe2 +.
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Claims 12
Claim · model-written summary
Flooding increased soil Fe2 + content relative to TMP in alluvial loamy paddy soil by 585.4%.
- Taxon
- rice
Oryza sativat0 - Treatment
- treatment WFe0
- Outcome
- Fe2 + content in ALPSe0
- Direction
- increasede0
- Value
- 585.4%e0
- Comparator
- TMPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Compared with TMP,treatment WF increased the Fe2 + content in ALPS by 585.4%”
Claim · model-written summary
Flooding increased soil Fe2 + content relative to TMP in reddish yellow paddy soil by 1316.3%.
- Taxon
- riceOryza sativat0
- Treatment
- WFe1
- Outcome
- Fe2 + contente1
- Direction
- increaseinferrede0
- Value
- 1316.3%e0
- Comparator
- TMPe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“and that in RYPS by 1316.3%”
e1“Compared with TMP,treatment WF increased the Fe2 + content in ALPS by 585.4%”
Claim · model-written summary
Flooding decreased available S in ALPS by 96.4% compared with TMP.
- Taxon
- riceOryza sativat0
- Treatment
- treatment WFe0
- Outcome
- available Se0
- Direction
- decreasede0
- Value
- 96.4%e0
- Comparator
- TMPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Comparing with TMP,treatment WF decreased the available S and available Cd contents in ALPS by 96.4% and 70.1%(P0.01)”
Claim · model-written summary
Flooding decreased available Cd in ALPS by 70.1% compared with TMP.
- Taxon
- riceOryza sativat0
- Treatment
- treatment WFe0
- Outcome
- available Cd contents in ALPSe0
- Direction
- decreasede0
- Value
- 70.1%e0
- Comparator
- TMPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Comparing with TMP,treatment WF decreased the available S and available Cd contents in ALPS by 96.4% and 70.1%(P0.01)”
Claim · model-written summary
Flooding decreased available S in RYPS by 55.5% compared with TMP.
- Taxon
- riceOryza sativat0
- Treatment
- WFe1
- Outcome
- available Se1
- Direction
- decreaseinferrede0
- Value
- 55.5%e0
- Comparator
- TMPe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“those in RYPS by 55.5% and 54.1%(P 0.01)”
e1“Comparing with TMP,treatment WF decreased the available S and available Cd contents in ALPS by 96.4% and 70.1%(P0.01)”
Claim · model-written summary
Flooding decreased available Cd in RYPS by 54.1% compared with TMP.
- Taxon
- riceOryza sativat0
- Treatment
- WFe1
- Outcome
- available Cde1
- Direction
- decreaseinferrede0
- Value
- 54.1%e0
- Comparator
- TMPe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“those in RYPS by 55.5% and 54.1%(P 0.01)”
e1“Comparing with TMP,treatment WF decreased the available S and available Cd contents in ALPS by 96.4% and 70.1%(P0.01)”
Claim · model-written summary
WF and MP produced relatively higher rice yield than other water management treatments on both soils.
- Taxon
- riceOryza sativae0
- Treatment
- WF and MPe0
- Outcome
- rice yielde0
- Direction
- highere0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On the two soils,WF and MP had a relatively higher rice yield than other treatments”
Claim · model-written summary
Flooding reduced rice stem and leaf Cd content on ALPS by 74.1% compared with TMP.
- Taxon
- riceOryza sativae0
- Treatment
- treatment WFe0
- Outcome
- Cd content in rice stem and leafe0
- Direction
- decreasede0
- Value
- 74.1%e0
- Comparator
- TMPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cd content in rice stem and leaf and in brown rice followed the sequence of WF MP TP WI TMP,and was decreased by 74.1% and 57.5%(P0.01) in treatment WF on ALPS”
Claim · model-written summary
Flooding reduced brown rice Cd content on ALPS by 57.5% compared with TMP.
- Taxon
- riceOryza sativae0
- Treatment
- treatment WFe0
- Outcome
- Cd content in rice stem and leaf and in brown ricee0
- Direction
- decreasede0
- Value
- 57.5%e0
- Comparator
- TMPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cd content in rice stem and leaf and in brown rice followed the sequence of WF MP TP WI TMP,and was decreased by 74.1% and 57.5%(P0.01) in treatment WF on ALPS”
Claim · model-written summary
Flooding reduced rice stem and leaf Cd content on RYPS by 55.6% compared with TMP.
- Taxon
- riceOryza sativae0
- Treatment
- treatment WFe0
- Outcome
- Cd content in rice stem and leafe0
- Direction
- decreasede0
- Value
- 55.6%e0
- Comparator
- TMPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cd content in rice stem and leaf and in brown rice followed the sequence of WF MP TP WI TMP,and was decreased by 74.1% and 57.5%(P0.01) in treatment WF on ALPS,and by 55.6% and 43.6%(P0.01) in treatment WF on RYPS”
Claim · model-written summary
Flooding reduced brown rice Cd content on RYPS by 43.6% compared with TMP.
- Taxon
- riceOryza sativae0
- Treatment
- treatment WFe0
- Outcome
- Cd content in rice stem and leaf and in brown ricee0
- Direction
- decreasede0
- Value
- 43.6%e0
- Comparator
- TMPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cd content in rice stem and leaf and in brown rice followed the sequence of WF MP TP WI TMP,and was decreased by 74.1% and 57.5%(P0.01) in treatment WF on ALPS,and by 55.6% and 43.6%(P0.01) in treatment WF on RYPS”
Claim · model-written summary
Water management affected rice Cd uptake through soil Fe2 + and available S, with a larger effect on available S.
- Taxon
- riceOryza sativae0
- Treatment
- water management modese0
- Outcome
- Cd absorption and accumulation by ricee0
- Qualifier
- soil Fe2 + and available S contentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water management modes also played important roles in the Cd absorption and accumulation by rice via affecting the soil Fe2 + and available S contents,with the effects being significantly larger on soil available S than on soil Fe2 +”
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