Abstract
The following parameters were investigated in a two-year farm experiments with materials of hybrid rice cultivar “Kyou 818”, which were Rainfall use efficiency(RUE), irrigation and drainage quota, loss load of nitrogen and phosphorus, grain yield and irrigation water production efficiency(IWPE) under rain-catching and controlled irrigation(RCCI), continuous flooding irrigation (CFI) and shallow frequent irrigation(SFI). Comparative analysis results of different irrigation models were presented to study the water saving, labor saving and environmental effects of RCCI. Results showed that comparing with CFI and SFI without reduction of grain yield, RCCI increased RUE by 3%–12% while it reduced irrigation quota and drainage quota by 15%–32% and 13%–68% respectively. RCCI decreased both irrigation times and drainage frequency by 1-3times. In addition, the loss load of nitrogen and phosphorus from surface drainage water declined 24%–78% and 40%–80%, respectively. However, if the rain-catching depth was excessively high under RCCI, it would cause a small cut of grain yield by about 3%–6%. The results above indicated that RCCI had advantages of water-saving, labor-saving and environment—protecting and it was suitable for rainy regions in South China.
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Claims 8
Claim · model-written summary
RCCI increased rainfall use efficiency of rice by 3%-12% compared with CFI and SFI without reducing grain yield.
- Taxon
- rice
Oryza sativae0 - Material
- Kyou 818e0
- Treatment
- RCCIe2
- Outcome
- RUEe2
- Direction
- increasede2
- Value
- 3%–12%e2
- Qualifier
- without reduction of grain yielde2
- Comparator
- CFI and SFIe2
- Setting
- two-year farm experimentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“materials of hybrid rice cultivar “Kyou 818””
e1“two-year farm experiments”
e2“comparing with CFI and SFI without reduction of grain yield, RCCI increased RUE by 3%–12%”
Claim · model-written summary
RCCI reduced irrigation quota of rice by 15%-32% compared with CFI and SFI.
- Taxon
- riceOryza sativae0
- Treatment
- RCCIe2
- Outcome
- irrigation quotae1
- Direction
- reducede1
- Value
- 15%–32%e1
- Comparator
- CFI and SFIe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“materials of hybrid rice cultivar “Kyou 818””
e1“it reduced irrigation quota and drainage quota by 15%–32% and 13%–68% respectively”
e2“comparing with CFI and SFI without reduction of grain yield, RCCI increased RUE by 3%–12%”
Claim · model-written summary
RCCI reduced drainage quota of rice by 13%-68% compared with CFI and SFI.
- Taxon
- riceOryza sativae0
- Treatment
- RCCIe2
- Outcome
- drainage quotae1
- Direction
- reducede1
- Value
- 13%–68%e1
- Comparator
- CFI and SFIe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“materials of hybrid rice cultivar “Kyou 818””
e1“it reduced irrigation quota and drainage quota by 15%–32% and 13%–68% respectively”
e2“comparing with CFI and SFI without reduction of grain yield, RCCI increased RUE by 3%–12%”
Claim · model-written summary
RCCI decreased irrigation times and drainage frequency of rice by 1-3 times.
- Taxon
- riceOryza sativae0
- Treatment
- RCCIe1
- Outcome
- irrigation times and drainage frequencye1
- Direction
- decreasede1
- Value
- 1-3timese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“materials of hybrid rice cultivar “Kyou 818””
e1“RCCI decreased both irrigation times and drainage frequency by 1-3times”
Claim · model-written summary
RCCI reduced the loss load of nitrogen from surface drainage water of rice by 24%-78%.
- Taxon
- riceOryza sativae0
- Treatment
- RCCIe1
- Outcome
- loss load of nitrogene2
- Direction
- declinede2
- Value
- 24%–78%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“materials of hybrid rice cultivar “Kyou 818””
e1“RCCI decreased both irrigation times and drainage frequency by 1-3times”
e2“the loss load of nitrogen and phosphorus from surface drainage water declined 24%–78% and 40%–80%, respectively”
Claim · model-written summary
RCCI reduced the loss load of phosphorus from surface drainage water of rice by 40%-80%.
- Taxon
- riceOryza sativae0
- Treatment
- RCCIe1
- Outcome
- loss load of nitrogen and phosphoruse2
- Direction
- declinede2
- Value
- 40%–80%e2
- Qualifier
- phosphoruse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“materials of hybrid rice cultivar “Kyou 818””
e1“RCCI decreased both irrigation times and drainage frequency by 1-3times”
e2“the loss load of nitrogen and phosphorus from surface drainage water declined 24%–78% and 40%–80%, respectively”
Claim · model-written summary
Excessively high rain-catching depth under RCCI cut rice grain yield by about 3%-6%.
- Taxon
- riceOryza sativae0
- Treatment
- the rain-catching depth was excessively high under RCCIe1
- Outcome
- grain yielde1
- Direction
- cute1
- Value
- 3%–6%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“materials of hybrid rice cultivar “Kyou 818””
e1“if the rain-catching depth was excessively high under RCCI, it would cause a small cut of grain yield by about 3%–6%”
Claim · model-written summary
RCCI is suitable for rainy regions in South China, with advantages of water saving, labor saving and environmental protection for rice.
- Taxon
- riceOryza sativae0
- Outcome
- suitable for rainy regions in South Chinae1
- Qualifier
- water-saving, labor-saving and environment—protectinge1
- Setting
- rainy regions in South Chinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“materials of hybrid rice cultivar “Kyou 818””
e1“RCCI had advantages of water-saving, labor-saving and environment—protecting and it was suitable for rainy regions in South China”
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