Abstract
Abstract Crop establishment is one of the major rice production operations that strongly affects rice production, productivity, and environmental impacts. This research introduced a new technology and provided scientific evidence for the benefits of mechanized wet direct seeding (mDSR) of rice as compared with the other crop establishment practices commonly applied by farmers for wet direct seeded rice in Mekong River Delta in Vietnam, such as seeding in line using drum-seeder (dDSR) and broadcast seeding (bDSR). The experiment was implemented across two consecutive rice cropping seasons that are Winter-Spring season and Summer-Autumn season in 2020–2021. Treatments included (1–3) mDSR with seeding rates of 30, 50, and 70 kg ha − 1 , (4) dDSR with 80 kg ha − 1 seed rate, and (5) bDSR as current farmer practice with seeding rate of 180 kg ha − 1 . The fertilizer application was adjusted as per seeding rate with 80:40:30 kg ha − 1 N: P 2 O 5 : K 2 O with lower seed rate 30 and 50 kg ha − 1 in mDSR; 90:40:30 kg ha − 1 N: P 2 O 5 : K 2 O with medium seed rate of 70 to 80 kg ha − 1 ; and 115:55:40 kg ha − 1 N: P 2 O 5 : K 2 O with high seed rate of 180 kg ha − 1 in bDSR. Mechanized wet direct seeding rice with a lower seed rate of 30 to 70 kg ha − 1 and fertilizer rate by 22–30% reduced variation in seedling density by 40–80% and in yield by 0.1 to 0.3 t ha − 1 and had similar yield to bDSR. In consequence, N productivity was 27 and 32% higher in mDSR as compared to bDSR during the Winter-Spring season and Summer-Autumn seasons, respectively. The use of lower seed rate and fertilizer in mDSR also led to higher income and lower carbon footprint (GHGe per kg of paddy grains) of rice production than the currently used practices of bDSR. Net income of mDSR was comparable to that of dDSR and higher by 145–220 and 171–248 $US than that of bDSR in Winter-Spring season and Summer-Autumn, respectively. The carbon footprint of mDSR rice production compared to bDSR was lower by 22–25% and 12–20% during the Winter-Spring and Summer-Autumn seasons, respectively. Given the above benefits of farming efficiency, higher income, and low emission, mDSR would be a technology package that strongly supports sustainable rice cultivation transformation for the Mekong River Delta of Vietnam.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 10
Claim · model-written summary
Mechanized direct seeding reduced variation in seedling density by 40–80%.
- Taxon
- rice
Oryza sativae0 - Treatment
- Mechanized wet direct seedinge0
- Outcome
- variation in seedling densitye0
- Direction
- reducede0
- Value
- 40–80%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mechanized wet direct seeding rice with a lower seed rate of 30 to 70 kg ha − 1 and fertilizer rate by 22–30% reduced variation in seedling density by 40–80%”
Claim · model-written summary
Mechanized direct seeding reduced yield variation by 0.1 to 0.3 t ha−1.
- Taxon
- riceOryza sativae1
- Treatment
- Mechanized wet direct seedinge1
- Outcome
- yielde0
- Direction
- reducede0
- Value
- 0.1 to 0.3 t ha − 1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced variation in seedling density by 40–80% and in yield by 0.1 to 0.3 t ha − 1”
e1“Mechanized wet direct seeding rice”
Claim · model-written summary
Mechanized direct seeding had similar yield to broadcast direct seeding.
- Taxon
- riceOryza sativae0
- Treatment
- Mechanized wet direct seedinge0
- Outcome
- yielde1
- Direction
- similare1
- Comparator
- bDSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mechanized wet direct seeding rice”
e1“had similar yield to bDSR”
Claim · model-written summary
Nitrogen productivity was 27% higher with mechanized seeding in Winter-Spring.
- Taxon
- riceOryza sativae0
- Treatment
- mDSRe1
- Outcome
- N productivitye1
- Direction
- highere1
- Value
- 27e1
- Qualifier
- Winter-Spring seasone1
- Comparator
- bDSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mDSR rice production”
e1“N productivity was 27 and 32% higher in mDSR as compared to bDSR during the Winter-Spring season and Summer-Autumn seasons, respectively”
Claim · model-written summary
Nitrogen productivity was 32% higher with mechanized seeding in Summer-Autumn.
- Taxon
- riceOryza sativae0
- Treatment
- mDSRe1
- Outcome
- N productivitye1
- Direction
- highere1
- Value
- 32%e1
- Qualifier
- Summer-Autumn seasonse1
- Comparator
- bDSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mDSR rice production”
e1“N productivity was 27 and 32% higher in mDSR as compared to bDSR during the Winter-Spring season and Summer-Autumn seasons, respectively”
Claim · model-written summary
Net income with mechanized seeding was comparable to drum seeding.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mDSR rice production”
e1“Net income of mDSR was comparable to that of dDSR”
Claim · model-written summary
Mechanized seeding raised net income by 145–220 $US over broadcast seeding in Winter-Spring.
- Taxon
- riceOryza sativae0
- Treatment
- mDSRe2
- Outcome
- Net incomee2
- Direction
- highere1
- Value
- 145–220e1
- Qualifier
- Winter-Spring seasone1
- Comparator
- bDSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mDSR rice production”
e1“higher by 145–220 and 171–248 $US than that of bDSR in Winter-Spring season and Summer-Autumn, respectively”
e2“Net income of mDSR”
Claim · model-written summary
Mechanized seeding raised net income by 171–248 $US over broadcast seeding in Summer-Autumn.
- Taxon
- riceOryza sativae0
- Treatment
- mDSRe2
- Outcome
- Net incomee2
- Direction
- highere1
- Value
- 171–248 $USe1
- Qualifier
- Summer-Autumne1
- Comparator
- bDSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mDSR rice production”
e1“higher by 145–220 and 171–248 $US than that of bDSR in Winter-Spring season and Summer-Autumn, respectively”
e2“Net income of mDSR”
Claim · model-written summary
Mechanized seeding lowered carbon footprint by 22–25% in Winter-Spring.
- Taxon
- riceOryza sativae0
- Treatment
- mDSRe1
- Outcome
- carbon footprinte1
- Direction
- lowere1
- Value
- 22–25%e1
- Qualifier
- Winter-Springe1
- Comparator
- bDSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mDSR rice production”
e1“The carbon footprint of mDSR rice production compared to bDSR was lower by 22–25% and 12–20% during the Winter-Spring and Summer-Autumn seasons, respectively”
Claim · model-written summary
Mechanized seeding lowered carbon footprint by 12–20% in Summer-Autumn.
- Taxon
- riceOryza sativae0
- Treatment
- mDSRe1
- Outcome
- carbon footprinte1
- Direction
- lowere1
- Value
- 12–20%e1
- Qualifier
- Summer-Autumne1
- Comparator
- bDSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mDSR rice production”
e1“The carbon footprint of mDSR rice production compared to bDSR was lower by 22–25% and 12–20% during the Winter-Spring and Summer-Autumn seasons, respectively”
The same questions in other papers
transplanting · yield · Oryza sativa (rice)Positive and negative results
921 papers in the same direction as this paper · 132 in the opposite direction · 24 reporting no difference from an alternative
- no effect
- positive
- positive
1,074 papers more in this group
See all 1,078 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.