Abstract
Direct-seeded rice has the potential to address labor and water shortage problems, and avoid possible deleterious effects of puddling on sequence crops. However, the integrated effect of irrigation and nitrogen management on crop and water productivity is not well understood in alluvial soils of India. Therefore, a field study was conducted to evaluate different irrigation thresholds and N split applications on water use and productivity and N use efficiency in DSR. Treatments were established in a split-plot design with three replications . Main plots compared irrigation thresholds based on soil water tension: (i) 0 kPa; (ii) 10 kPa; (iii) 20 kPa; and (iv) 40/10 kPa). Sub plots evaluated N management practices: (i) no N application, (ii) 120 kg N ha−1 as three equal splits, and (iii) 120 kg N ha−1 as four equal splits. Irrigation at 0 and 10 kPa recorded the highest biomass accumulation which decreased by 10-16% with higher water stress. However, irrigation water productivity increased with an increase in water stress. Irrigation at 10 and 20 kPa combined with four N splits resulted in grain yield similar to when irrigation was applied at 0 kPa with three or four N splits. There was a saving of irrigation water up to 17 to 36%, 30 to 46% and 54- 61% with 10 kPa, 20 kPa, and 40/10 kPa, respectively. It was concluded that irrigation at 10 and 20 kPa, and four N splits were beneficial for increasing grain yield and water productivity of DSR.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Irrigation at 0 and 10 kPa produced the highest rice biomass accumulation.
- Taxon
- rice
Oryza sativat0 - Treatment
- Irrigation at 0 and 10 kPae0
- Outcome
- biomass accumulatione0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation at 0 and 10 kPa recorded the highest biomass accumulation”
t0“rice”
Claim · model-written summary
Higher water stress reduced rice biomass accumulation by 10-16%.
- Taxon
- riceOryza sativat0
- Treatment
- higher water stresse0
- Outcome
- biomass accumulatione0
- Direction
- decreasede0
- Value
- 10-16%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest biomass accumulation which decreased by 10-16% with higher water stress”
t0“rice”
Claim · model-written summary
Irrigation water productivity increased as water stress increased.
- Taxon
- riceOryza sativat0
- Treatment
- water stresse0
- Outcome
- irrigation water productivitye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irrigation water productivity increased with an increase in water stress”
t0“rice”
Claim · model-written summary
Irrigation at 10 and 20 kPa with four nitrogen splits gave rice grain yield similar to 0 kPa with three or four splits.
- Taxon
- riceOryza sativat0
- Treatment
- Irrigation at 10 and 20 kPa combined with four N splitse0
- Outcome
- grain yielde0
- Direction
- similare0
- Comparator
- irrigation was applied at 0 kPa with three or four N splitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation at 10 and 20 kPa combined with four N splits resulted in grain yield similar to when irrigation was applied at 0 kPa with three or four N splits”
t0“rice”
Claim · model-written summary
Irrigation at 10 kPa saved 17 to 36% irrigation water.
- Taxon
- riceOryza sativat0
- Treatment
- 10 kPae0
- Outcome
- saving of irrigation watere0
- Direction
- savinge0
- Value
- 17 to 36%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“saving of irrigation water up to 17 to 36%, 30 to 46% and 54- 61% with 10 kPa, 20 kPa, and 40/10 kPa, respectively”
t0“rice”
Claim · model-written summary
Irrigation at 20 kPa saved 30 to 46% irrigation water.
- Taxon
- riceOryza sativat0
- Treatment
- 20 kPae0
- Outcome
- saving of irrigation watere0
- Direction
- savinge0
- Value
- 30 to 46%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“saving of irrigation water up to 17 to 36%, 30 to 46% and 54- 61% with 10 kPa, 20 kPa, and 40/10 kPa, respectively”
t0“rice”
Claim · model-written summary
Irrigation at 40/10 kPa saved 54- 61% irrigation water.
- Taxon
- riceOryza sativat0
- Treatment
- 40/10 kPae0
- Outcome
- saving of irrigation watere0
- Direction
- savinge0
- Value
- 54- 61%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“saving of irrigation water up to 17 to 36%, 30 to 46% and 54- 61% with 10 kPa, 20 kPa, and 40/10 kPa, respectively”
t0“rice”
Claim · model-written summary
The authors concluded that 10 and 20 kPa irrigation with four nitrogen splits benefits grain yield and water productivity.
- Taxon
- riceOryza sativat0
- Treatment
- irrigation at 10 and 20 kPa, and four N splitse0
- Outcome
- increasing grain yield and water productivity of DSRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irrigation at 10 and 20 kPa, and four N splits were beneficial for increasing grain yield and water productivity of DSR”
t0“rice”
The same questions in other papers
drought · growth · Oryza sativa (rice)Positive and negative results
183 papers in the same direction as this paper · 98 in the opposite direction
- positive
- positive
- positive
278 papers more in this group
See all 282 papers →irrigation · growth · Oryza sativa (rice)Positive and negative results
221 papers in the same direction as this paper · 62 in the opposite direction · 7 reporting no difference from an alternative
- negative
- negative
- negative
287 papers more in this group
See all 291 papers →irrigation · yield · Oryza sativa (rice)Positive and negative results
264 papers in the same direction as this paper · 906 in the opposite direction
- positive
- positive
- positive
1,167 papers more in this group
See all 1,171 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.