Abstract
Rice (Oryza sativa L.) is the most important grain crop for more than half of the world's population especially in Asia. Nitrogen (N) plays a crucial role in rice production. The incorporation of the cover crop as a pre- rice crop is the potential to improve the nitrogen used by rice crops. The experiment was conducted on the clay loam of Svay Rieng Province Cambodia in 2022 during the rice cropping season. The trial was designed using Spit-Plot design, with 4 levels of nitrogen (N) as main-plot and Cover Crop (CC) as a sub-plot. The CC was either the absence of CC or the use of incorporated Sesbania sesban L. (30 kg ha-1 ) as a pre-rice crop. The application rate of nitrogen was 0, 35, 70 and 105 kg ha–1 , respectively. Direct-seeded rice (DSR) was 100 Kg ha-1 . The size of each plot was 16 m2 (4 m×4 m). The experiment was conducted in 3 replicates. An analysis of variance (ANOVA) on Plants Height revealed a significant difference at 1% (P < 0.01) effect of nitrogen level. N35 had the greatest average height (82.95 cm) and N0 was the shortest plant height (77.15 cm). Additionally, a significant difference at 1% (P < 0.01) of planting (CC). CC1 was the tallest plant height (81.75 cm), while CC0 was the shortest plant height (78.49 cm). However, the interaction between N level and CC was not statistically significant (P > 0.05) on Plant height. An analysis of variance (ANOVA) on Grain yield showed a significant difference at 1% (P < 0.01) N70 had the highest average yield (4.92 tons/ha) and N0 had the lowest yield averaging (3.53 tons/ha). Planting (CC) was a significant difference at 1% (P < 0.01). CC1 had the highest average yield (4.60 tons/ha), while CC0 had the lowest average yield (4.13 tons/ha). the interaction between N level and CC was not statistically significant (P > 0.05) The results suggested that among 4 levels of nitrogen, The application of any rates of fertilizers increased the grain yield compared to non-N application. The grain yield was even higher with the incorporation of CC as a pre-rice crop.
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Claims 7
Claim · model-written summary
Nitrogen level significantly affected rice height; N35 was tallest at 82.95 cm versus N0 at 77.15 cm.
- Taxon
- Rice
Oryza sativae2 - Treatment
- N35e0
- Outcome
- average heighte0
- Direction
- greateste0
- Value
- 82.95 cme0
- Qualifier
- 77.15 cme0
- Comparator
- N0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of nitrogen level. N35 had the greatest average height (82.95 cm) and N0 was the shortest plant height (77.15 cm)”
e1“revealed a significant difference at 1% (P < 0.01) effect of nitrogen level”
e2“Rice”
Claim · model-written summary
Cover crop incorporation increased rice height to 81.75 cm versus 78.49 cm without it.
- Taxon
- RiceOryza sativae2
- Treatment
- incorporated Sesbania sesban L. (30 kg ha-1 )e1
- Outcome
- plant heighte0
- Direction
- talleste0
- Value
- 81.75 cme0
- Qualifier
- 78.49 cme0
- Comparator
- CC0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CC1 was the tallest plant height (81.75 cm), while CC0 was the shortest plant height (78.49 cm)”
e1“incorporated Sesbania sesban L. (30 kg ha-1 ) as a pre-rice crop”
e2“Rice”
Claim · model-written summary
Nitrogen and cover crop had no significant interaction on rice height.
- Taxon
- RiceOryza sativae1
- Treatment
- N level and CCe0
- Outcome
- Plant heighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“interaction between N level and CC was not statistically significant (P > 0.05) on Plant height”
e1“Rice”
Claim · model-written summary
N70 gave the highest rice yield at 4.92 tons/ha versus N0 at 3.53 tons/ha.
- Taxon
- RiceOryza sativae1
- Treatment
- N70e0
- Outcome
- average yielde0
- Direction
- higheste0
- Value
- 4.92 tons/hae0
- Qualifier
- 3.53 tons/hae0
- Comparator
- N0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N70 had the highest average yield (4.92 tons/ha) and N0 had the lowest yield averaging (3.53 tons/ha)”
e1“Rice”
Claim · model-written summary
Cover crop incorporation raised rice yield to 4.60 tons/ha versus 4.13 tons/ha without it.
- Taxon
- RiceOryza sativae2
- Treatment
- incorporated Sesbania sesban L. (30 kg ha-1 )e1
- Outcome
- average yielde0
- Direction
- higheste0
- Value
- 4.60 tons/hae0
- Qualifier
- 4.13 tons/hae0
- Comparator
- CC0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CC1 had the highest average yield (4.60 tons/ha), while CC0 had the lowest average yield (4.13 tons/ha)”
e1“incorporated Sesbania sesban L. (30 kg ha-1 ) as a pre-rice crop”
e2“Rice”
Claim · model-written summary
Nitrogen and cover crop had no significant interaction on grain yield.
- Taxon
- RiceOryza sativae2
- Treatment
- N level and CCe0
- Outcome
- Grain yielde1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the interaction between N level and CC was not statistically significant (P > 0.05) The results suggested”
e1“Grain yield”
e2“Rice”
Claim · model-written summary
Every fertilizer rate increased grain yield versus no nitrogen.
- Taxon
- RiceOryza sativae1
- Treatment
- any rates of fertilizerse0
- Outcome
- grain yielde0
- Direction
- increasede0
- Comparator
- non-N applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of any rates of fertilizers increased the grain yield compared to non-N application”
e1“Rice”
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