Abstract
To reveal the effect of biochar addition on rice growth and yield under water-saving irrigation, a 2-year field experiment was carried out to clarify the variations of rice tiller number, plant height, yield components, and irrigation water use efficiency with different biochar application amounts (0, 20, 40 t/ha) and irrigation management (flooding irrigation and water-saving irrigation). The results showed that the rice yield with biochar addition (20 and 40 t/ha) was 15.53% and 24.43% higher than that of non-biochar addition paddy fields under water-saving irrigation. The addition of biochar promoted the growth of tillers and plant height, improved the filled grain number, productive panicle number, and seed setting rate, thus affecting rice yield. Rice yield was raised with the increase in the biochar application amount. Under the condition of water-saving irrigation, water deficit had a certain negative effect on the rice growth indexes, resulting in a slight decrease in yield. However, irrigation water input was significantly decreased with water-saving irrigation compare to flooding irrigation. Under the comprehensive effect of water-saving irrigation and biochar application, the irrigation water use efficiency of a rice paddy field with high biochar application (40 t/ha) under water-saving irrigation was the highest, with an average increase of 91.05% compared to a paddy field with flooding irrigation. Therefore, the application of biochar in paddy fields with water-saving irrigation can substantially save irrigation water input, stably increase rice yield, and ultimately improve irrigation water productive efficiency.
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Claims 9
Claim · model-written summary
20 t/ha biochar increased rice yield by 15.53% under water-saving irrigation.
- Taxon
- rice
Oryza sativae0 - Treatment
- biochar addition (20 and 40 t/ha)e0
- Outcome
- rice yielde0
- Direction
- highere0
- Value
- 15.53%e0
- Qualifier
- under water-saving irrigatione0
- Comparator
- non-biochar addition paddy fieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that the rice yield with biochar addition (20 and 40 t/ha) was 15.53% and 24.43% higher than that of non-biochar addition paddy fields under water-saving irrigation”
Claim · model-written summary
40 t/ha biochar increased rice yield by 24.43% under water-saving irrigation.
- Taxon
- riceOryza sativae0
- Treatment
- 40 t/hae0
- Outcome
- rice yielde0
- Direction
- highere0
- Value
- 24.43%e0
- Comparator
- non-biochar addition paddy fieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that the rice yield with biochar addition (20 and 40 t/ha) was 15.53% and 24.43% higher than that of non-biochar addition paddy fields under water-saving irrigation”
Claim · model-written summary
Biochar promoted tiller growth and plant height.
Not reportedTaxonComparator
Verbatim
e0“The addition of biochar promoted the growth of tillers and plant height”
Claim · model-written summary
Biochar improved filled grain number, productive panicle number and seed setting rate.
Not reportedTaxonTreatmentComparator
Verbatim
e0“improved the filled grain number, productive panicle number, and seed setting rate”
Claim · model-written summary
Rice yield rose as biochar application amount increased.
- Taxon
- riceOryza sativae0
- Treatment
- biochar application amounte0
- Outcome
- Rice yielde0
- Direction
- raisede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice yield was raised with the increase in the biochar application amount”
Claim · model-written summary
Under water-saving irrigation, water deficit negatively affected rice growth indexes.
- Taxon
- riceOryza sativae0
- Treatment
- water deficite0
- Outcome
- rice growth indexese0
- Direction
- negative effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the condition of water-saving irrigation, water deficit had a certain negative effect on the rice growth indexes”
Claim · model-written summary
Water deficit under water-saving irrigation slightly decreased yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water deficit had a certain negative effect on the rice growth indexes, resulting in a slight decrease in yield”
t0“Rice Growth and Yield”
Claim · model-written summary
Water-saving irrigation significantly decreased irrigation water input relative to flooding irrigation.
- Taxon
- riceOryza sativat0
- Treatment
- water-saving irrigatione0
- Outcome
- irrigation water inpute0
- Direction
- decreasede0
- Comparator
- flooding irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irrigation water input was significantly decreased with water-saving irrigation compare to flooding irrigation”
t0“Rice Growth and Yield”
Claim · model-written summary
At 40 t/ha biochar, water-saving irrigation gave the highest irrigation water use efficiency, averaging 91.05% above flooding irrigation.
- Taxon
- riceOryza sativae0
- Treatment
- high biochar application (40 t/ha) under water-saving irrigatione0
- Outcome
- irrigation water use efficiencye0
- Direction
- higheste0
- Value
- 91.05%e0
- Comparator
- a paddy field with flooding irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the irrigation water use efficiency of a rice paddy field with high biochar application (40 t/ha) under water-saving irrigation was the highest, with an average increase of 91.05% compared to a paddy field with flooding irrigation”
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