Abstract
In the middle and lower reaches of the Yangtze River, the rainfall is greater in summer. The technology of rain catching and controlled irrigation of rice help to save water by raising the water depth of the field after rain while the soil water content during the rest period is maintained at 70–100% of field capacity. The objectives of this study were to evaluate rice growth, canopy light utilization, and yield of rice under different rain-catching and controlled irrigation modes (T1: light drought and low storage, T2: light drought and high storage), and to find the optimal storage depth after rain for rice. Measurements included the rice plant height, tiller number, high tiller growth, leaf angle, canopy interception rate, and yield shape. The plot experiment was conducted in 2012 and 2013 using Nanjing 44 (Oryza sativa L.) as the test material. The results showed that T1 treatment improved the height of rice plants and the number of effective tillers in the late growth stage. The number of high tillers had a great influence on the total leaf dry quality; compared with conventional irrigation (CK), the number of high tillers increased by 11.36% and 7.87% in T1 and T2, respectively; the canopy interception rate of T1 above 0 cm was higher than that in T2 and CK; and the leaf area index (LAI) was closely related to the 0–40 cm of canopy light distribution. The number of grains per panicle in T1 was lower than in CK and T2; however, the number of grains in T1 was less, and the 1000 grain weight was higher. On the 63 days and 83 days after transplanting in 2012 and 78 days after transplanting in 2013, the first, second, and third leaf angles of T1 were larger. Rain-catching and controlled irrigation can increase the dry weight and shoot dry weight of rice, and light drought and low storage (T1) conditions are good for maintaining a high yield because of more tiller number, more grains per panicle and reasonable light distribution.
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Claims 12
Claim · model-written summary
T1 improved plant height and effective tiller number of rice in the late growth stage
- Taxon
- Oryza sativa L.
Oryza sativae0 - Material
- Nanjing 44e0
- Organ / stage
- late growth stagee1
- Treatment
- T1e1
- Outcome
- height of rice plants and the number of effective tillerse1
- Direction
- improvede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e1“T1 treatment improved the height of rice plants and the number of effective tillers in the late growth stage”
Claim · model-written summary
the number of high tillers increased by 11.36% in T1 compared with conventional irrigation
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- Nanjing 44e0
- Treatment
- T1e2
- Outcome
- number of high tillerse2
- Direction
- increasede2
- Value
- 11.36%e2
- Comparator
- conventional irrigation (CK)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e2“compared with conventional irrigation (CK), the number of high tillers increased by 11.36% and 7.87% in T1 and T2, respectively”
Claim · model-written summary
the number of high tillers increased by 7.87% in T2 compared with conventional irrigation
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- Nanjing 44e0
- Treatment
- T2e2
- Outcome
- number of high tillerse2
- Direction
- increasede2
- Value
- 7.87%e2
- Comparator
- conventional irrigation (CK)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e2“compared with conventional irrigation (CK), the number of high tillers increased by 11.36% and 7.87% in T1 and T2, respectively”
Claim · model-written summary
the number of high tillers had a great influence on total leaf dry quality
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- number of high tillerse3
- Outcome
- total leaf dry qualitye3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e3“the number of high tillers had a great influence on the total leaf dry quality”
Claim · model-written summary
canopy interception rate of T1 above 0 cm was higher than in T2 and CK
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- T1e4
- Outcome
- canopy interception ratee4
- Direction
- highere4
- Comparator
- T2 and CKe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e4“the canopy interception rate of T1 above 0 cm was higher than that in T2 and CK”
Claim · model-written summary
leaf area index was closely related to canopy light distribution at 0–40 cm
- Taxon
- Oryza sativa L.Oryza sativae0
- Organ / stage
- 0–40 cm of canopye5
- Outcome
- leaf area index (LAI)e5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e5“the leaf area index (LAI) was closely related to the 0–40 cm of canopy light distribution”
Claim · model-written summary
number of grains per panicle in T1 was lower than in CK and T2
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- T1e6
- Outcome
- number of grains per paniclee6
- Direction
- lowere6
- Comparator
- CK and T2e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e6“The number of grains per panicle in T1 was lower than in CK and T2”
Claim · model-written summary
1000 grain weight of T1 was higher
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- T1e7
- Outcome
- 1000 grain weighte7
- Direction
- highere7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e7“the number of grains in T1 was less, and the 1000 grain weight was higher”
Claim · model-written summary
number of grains in T1 was less
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- T1e7
- Outcome
- number of grainse7
- Direction
- lesse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e7“the number of grains in T1 was less, and the 1000 grain weight was higher”
Claim · model-written summary
first, second and third leaf angles of T1 were larger on the sampling dates after transplanting
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- T1e1
- Outcome
- first, second, and third leaf anglese1
- Direction
- largere1
- Qualifier
- 63 days and 83 days after transplanting in 2012e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e1“On the 63 days and 83 days after transplanting in 2012 and 78 days after transplanting in 2013, the first, second, and third leaf angles of T1 were larger”
Claim · model-written summary
rain-catching and controlled irrigation can increase dry weight and shoot dry weight of rice
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- Rain-catching and controlled irrigatione1
- Outcome
- dry weight and shoot dry weighte1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e1“Rain-catching and controlled irrigation can increase the dry weight and shoot dry weight of rice”
Claim · model-written summary
light drought and low storage conditions maintain high yield because of more tillers, more grains per panicle and reasonable light distribution
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- light drought and low storage (T1)e1
- Outcome
- maintaining a high yielde1
- Qualifier
- more tiller number, more grains per panicle and reasonable light distributione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nanjing 44 (Oryza sativa L.)”
e1“light drought and low storage (T1) conditions are good for maintaining a high yield because of more tiller number, more grains per panicle and reasonable light distribution”
The same questions in other papers
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See all 291 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.