Abstract
A hydroponic experiment was conducted to study the effects of rhizosphere oxygen concentration on rice seedling biomass,nutrient absorption and accumulation,and root morphology with Xiushui 09 and Chunyou 84 as material.With an online dissolved oxygen meter,four dissolved oxygen(DOTs)levels were set including low oxygen concentration(DOT 0to 1.0mg/L),medium oxygen concentration(DOT 2.5to 3.5mg/L),high oxygen concentration(DOT 6mg/L,continuous bubbling with atmospheric air)and control(conventional hydroponics,without oxygen regulation).The results showed that compared with the control,the root,shoot and total dry weights increased by30.30%,32.96% and 32.46%for Xiushui 09 and by 7.01%,1.77% and 9.17%for Chunyou 84,respectively under the medium oxygen concentration;under high oxygen contentration,the root,shoot and total dry weights decreased by35.35%,15.62% and 17.76%for Xiushui 09 and by 43.95%,18.92% and 21.34%for Chunyou 84,respectively.The root to shoot ratios increased under low oxygen treatment.The total absorption and accumulation of N,P,K,Mn,Mg and Ca increased under the medium oxygen treatment,and the total absorption and accumulation of Fe,Cu and Zn increased under the low oxygen treatment.The root tip numbers,length and surface area,the proportion of fine roots also increased and the coarse root decreased under the medium oxygen treatment.Under the medium oxygen treatment,the proportion of fine roots increased,which contributes to nutrient uptake.This might be one of the main reasons for the increase in some element concentrations.The biomass,nutrient concentration,and accumulation,and root morphology obviously varied with cultivar.
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Claims 20
Claim · model-written summary
Medium oxygen increased Xiushui 09 root dry weight by 30.30%.
- Taxon
- rice
Oryza sativat0 - Material
- Xiushui 09e0
- Treatment
- medium oxygen concentratione1
- Outcome
- roote0
- Direction
- increasede0
- Value
- 30.30%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with the control,the root,shoot and total dry weights increased by30.30%,32.96% and 32.46%for Xiushui 09”
t0“Rice at Tillering Stage”
e1“respectively under the medium oxygen concentration”
Claim · model-written summary
Medium oxygen increased Xiushui 09 shoot dry weight by 32.96%.
- Taxon
- riceOryza sativat0
- Material
- Xiushui 09e0
- Treatment
- medium oxygen concentratione1
- Outcome
- shoote0
- Direction
- increasede0
- Value
- 32.96%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with the control,the root,shoot and total dry weights increased by30.30%,32.96% and 32.46%for Xiushui 09”
t0“Rice at Tillering Stage”
e1“respectively under the medium oxygen concentration”
Claim · model-written summary
Medium oxygen increased Xiushui 09 total dry weight by 32.46%.
- Taxon
- riceOryza sativat0
- Material
- Xiushui 09e0
- Treatment
- medium oxygen concentratione1
- Outcome
- total dry weightse0
- Direction
- increasede0
- Value
- 32.46%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with the control,the root,shoot and total dry weights increased by30.30%,32.96% and 32.46%for Xiushui 09”
t0“Rice at Tillering Stage”
e1“respectively under the medium oxygen concentration”
Claim · model-written summary
Medium oxygen increased Chunyou 84 root dry weight by 7.01%.
- Taxon
- riceOryza sativat0
- Material
- Chunyou 84e0
- Treatment
- medium oxygen concentratione0
- Outcome
- roote2
- Value
- 7.01%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by 7.01%,1.77% and 9.17%for Chunyou 84,respectively under the medium oxygen concentration”
t0“Rice at Tillering Stage”
e1“respectively under the medium oxygen concentration”
e2“compared with the control,the root,shoot and total dry weights increased by30.30%,32.96% and 32.46%for Xiushui 09”
Claim · model-written summary
Medium oxygen increased Chunyou 84 shoot dry weight by 1.77%.
- Taxon
- riceOryza sativat0
- Material
- Chunyou 84e0
- Treatment
- medium oxygen concentratione0
- Value
- 1.77%e0
Not reportedComparatorOutcomeDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by 7.01%,1.77% and 9.17%for Chunyou 84,respectively under the medium oxygen concentration”
t0“Rice at Tillering Stage”
Claim · model-written summary
Medium oxygen increased Chunyou 84 total dry weight by 9.17%.
- Taxon
- riceOryza sativat0
- Material
- Chunyou 84e0
- Treatment
- medium oxygen concentratione0
- Value
- 9.17%e0
Not reportedComparatorOutcomeDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by 7.01%,1.77% and 9.17%for Chunyou 84,respectively under the medium oxygen concentration”
t0“Rice at Tillering Stage”
Claim · model-written summary
High oxygen reduced Xiushui 09 root dry weight by 35.35%.
- Taxon
- riceOryza sativat0
- Material
- Xiushui 09e0
- Treatment
- high oxygen contentratione0
- Outcome
- roote0
- Direction
- decreasede0
- Value
- 35.35%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under high oxygen contentration,the root,shoot and total dry weights decreased by35.35%,15.62% and 17.76%for Xiushui 09”
t0“Rice at Tillering Stage”
Claim · model-written summary
High oxygen reduced Xiushui 09 shoot dry weight by 15.62%.
- Taxon
- riceOryza sativat0
- Material
- Xiushui 09e0
- Treatment
- high oxygen contentratione0
- Outcome
- shoote0
- Direction
- decreasede0
- Value
- 15.62%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under high oxygen contentration,the root,shoot and total dry weights decreased by35.35%,15.62% and 17.76%for Xiushui 09”
t0“Rice at Tillering Stage”
Claim · model-written summary
High oxygen reduced Xiushui 09 total dry weight by 17.76%.
- Taxon
- riceOryza sativat0
- Material
- Xiushui 09e0
- Treatment
- high oxygen contentratione0
- Outcome
- total dry weightse0
- Direction
- decreasede0
- Value
- 17.76%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under high oxygen contentration,the root,shoot and total dry weights decreased by35.35%,15.62% and 17.76%for Xiushui 09”
t0“Rice at Tillering Stage”
Claim · model-written summary
High oxygen reduced Chunyou 84 root dry weight by 43.95%.
- Taxon
- riceOryza sativat0
- Material
- Chunyou 84e0
- Value
- 43.95%e0
Not reportedTreatmentComparatorOutcomeDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by 43.95%,18.92% and 21.34%for Chunyou 84,respectively.”
t0“Rice at Tillering Stage”
Claim · model-written summary
High oxygen reduced Chunyou 84 shoot dry weight by 18.92%.
- Taxon
- riceOryza sativat0
- Material
- Chunyou 84e0
- Value
- 18.92%e0
Not reportedTreatmentComparatorOutcomeDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by 43.95%,18.92% and 21.34%for Chunyou 84,respectively.”
t0“Rice at Tillering Stage”
Claim · model-written summary
High oxygen reduced Chunyou 84 total dry weight by 21.34%.
- Taxon
- riceOryza sativat0
- Material
- Chunyou 84e0
- Value
- 21.34%e0
Not reportedTreatmentComparatorOutcomeDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by 43.95%,18.92% and 21.34%for Chunyou 84,respectively.”
t0“Rice at Tillering Stage”
Claim · model-written summary
Low oxygen increased root to shoot ratios.
- Taxon
- riceOryza sativat0
- Treatment
- low oxygen treatmente0
- Outcome
- root to shoot ratiose0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root to shoot ratios increased under low oxygen treatment.”
t0“Rice at Tillering Stage”
Claim · model-written summary
Medium oxygen increased total absorption and accumulation of N, P and K.
- Taxon
- riceOryza sativat0
- Treatment
- medium oxygen treatmente0
- Outcome
- total absorption and accumulation of N,P,K,Mn,Mg and Cae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total absorption and accumulation of N,P,K,Mn,Mg and Ca increased under the medium oxygen treatment”
t0“Rice at Tillering Stage”
Claim · model-written summary
Low oxygen increased total absorption and accumulation of Fe, Cu and Zn.
- Taxon
- riceOryza sativat0
- Treatment
- low oxygen treatmente0
- Outcome
- total absorption and accumulation of Fe,Cu and Zne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the total absorption and accumulation of Fe,Cu and Zn increased under the low oxygen treatment.”
t0“Rice at Tillering Stage”
Claim · model-written summary
Medium oxygen increased root tip number, length and surface area.
- Taxon
- riceOryza sativat0
- Treatment
- medium oxygen treatmente0
- Outcome
- root tip numbers,length and surface areae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root tip numbers,length and surface area,the proportion of fine roots also increased and the coarse root decreased under the medium oxygen treatment.”
t0“Rice at Tillering Stage”
Claim · model-written summary
Medium oxygen increased the proportion of fine roots.
- Taxon
- riceOryza sativat0
- Treatment
- medium oxygen treatmente0
- Outcome
- proportion of fine rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the proportion of fine roots also increased and the coarse root decreased under the medium oxygen treatment.”
t0“Rice at Tillering Stage”
Claim · model-written summary
Medium oxygen decreased coarse roots.
- Taxon
- riceOryza sativat0
- Treatment
- medium oxygen treatmente0
- Outcome
- coarse roote0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the coarse root decreased under the medium oxygen treatment.”
t0“Rice at Tillering Stage”
Claim · model-written summary
The authors proposed that more fine roots under medium oxygen contribute to nutrient uptake.
- Taxon
- riceOryza sativat0
- Treatment
- medium oxygen treatmente0
- Outcome
- nutrient uptakee0
- Qualifier
- proportion of fine roots increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the medium oxygen treatment,the proportion of fine roots increased,which contributes to nutrient uptake.”
t0“Rice at Tillering Stage”
Claim · model-written summary
Biomass, nutrient traits and root morphology varied with cultivar.
- Taxon
- riceOryza sativat0
- Material
- cultivare0
- Outcome
- biomass,nutrient concentration,and accumulation,and root morphologye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biomass,nutrient concentration,and accumulation,and root morphology obviously varied with cultivar.”
t0“Rice at Tillering Stage”
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