Abstract
The objective of this research was to quantify the effects of water-saving regimes and fertilizer application improvement on water productivity, N-use efficiency, and rice yield. The results showed that the tested water treatments did not have significant effects on the growth and development, yield components, and final grain yield, but water productivity was significantly increased from 1.28 kg grain m-3 (W0) water to 1.74 kg grain m-3 water (W1) and 1.94 kg grain m-3 water (W2). In addition, the percentage of total irrigation water saved from W1 and W2 were 25.24-44.52% compared to continuous flooding. Fertilizer deep placement (FDP) combined with organic compost significantly increased the grain yield of the tested hybrid rice variety. Average grain yield increased quickly from 2847 kg ha-1 with 0 kg N ha-1 to 5263 kg ha-1 with 120 kg N ha-1 under the fertilizer deep placement method. The highest total nitrogen uptake, agronomic nitrogen efficiency (ANE), and nitrogen uptake efficiency (NUE) were obtained from alternate wetting and drying at a -20cm water depth and the fertilizer deep placement method (W1N2). In addition, it also gave the highest income in comparison with the other treatments. Therefore, alternate wetting and drying at a -20cm water depth and fertilizer deep placement method should be encouraged for implementation in other regions of Vietnam.
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Claims 9
Claim · model-written summary
Water treatments did not significantly change rice growth, yield components or grain yield.
- Taxon
- Rice
Oryza sativat0 - Treatment
- tested water treatmentse0
- Outcome
- growth and development, yield components, and final grain yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tested water treatments did not have significant effects on the growth and development, yield components, and final grain yield”
t0“Rice”
Claim · model-written summary
Water productivity increased from W0 to W1.
- Taxon
- RiceOryza sativat0
- Treatment
- W1e0
- Outcome
- water productivitye0
- Direction
- increasede0
- Value
- 1.74 kg grain m-3 watere0
- Qualifier
- 1.28 kg grain m-3e0
- Comparator
- W0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water productivity was significantly increased from 1.28 kg grain m-3 (W0) water to 1.74 kg grain m-3 water (W1) and 1.94 kg grain m-3 water (W2)”
t0“Rice”
Claim · model-written summary
Water productivity increased from W0 to W2.
- Taxon
- RiceOryza sativat0
- Treatment
- W2e0
- Outcome
- water productivitye0
- Direction
- increasede0
- Value
- 1.94 kg grain m-3 watere0
- Comparator
- W0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water productivity was significantly increased from 1.28 kg grain m-3 (W0) water to 1.74 kg grain m-3 water (W1) and 1.94 kg grain m-3 water (W2)”
t0“Rice”
Claim · model-written summary
W1 and W2 saved irrigation water relative to continuous flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- W1 and W2e0
- Outcome
- total irrigation watere0
- Direction
- savede0
- Value
- 25.24-44.52%e0
- Comparator
- continuous floodinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percentage of total irrigation water saved from W1 and W2 were 25.24-44.52% compared to continuous flooding”
t0“Rice”
Claim · model-written summary
Deep fertilizer placement with organic compost increased grain yield.
- Taxon
- riceOryza sativae0
- Treatment
- Fertilizer deep placement (FDP) combined with organic composte0
- Outcome
- grain yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer deep placement (FDP) combined with organic compost significantly increased the grain yield of the tested hybrid rice variety”
Claim · model-written summary
Grain yield rose from 2847 to 5263 kg ha-1 as nitrogen application rose to 120 kg N ha-1 with deep placement.
- Taxon
- RiceOryza sativat0
- Treatment
- 120 kg N ha-1e0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 5263 kg ha-1e0
- Qualifier
- 2847 kg ha-1e0
- Comparator
- 0 kg N ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Average grain yield increased quickly from 2847 kg ha-1 with 0 kg N ha-1 to 5263 kg ha-1 with 120 kg N ha-1 under the fertilizer deep placement method”
t0“Rice”
Claim · model-written summary
W1N2 gave the highest total nitrogen uptake, agronomic nitrogen efficiency and uptake efficiency.
- Taxon
- RiceOryza sativat0
- Treatment
- alternate wetting and drying at a -20cm water depth and the fertilizer deep placement method (W1N2)e0
- Outcome
- total nitrogen uptake, agronomic nitrogen efficiency (ANE), and nitrogen uptake efficiency (NUE)e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest total nitrogen uptake, agronomic nitrogen efficiency (ANE), and nitrogen uptake efficiency (NUE) were obtained from alternate wetting and drying at a -20cm water depth and the fertilizer deep placement method (W1N2)”
t0“Rice”
Claim · model-written summary
W1N2 gave the highest income among treatments.
- Taxon
- RiceOryza sativat0
- Treatment
- W1N2e0
- Outcome
- incomee0
- Direction
- higheste0
- Comparator
- the other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fertilizer deep placement method (W1N2). In addition, it also gave the highest income in comparison with the other treatments”
t0“Rice”
Claim · model-written summary
The authors recommend alternate wetting and drying at -20cm with deep fertilizer placement in other Vietnamese regions.
- Taxon
- RiceOryza sativat0
- Outcome
- alternate wetting and drying at a -20cm water depth and fertilizer deep placement methode0
- Setting
- other regions of Vietname0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“alternate wetting and drying at a -20cm water depth and fertilizer deep placement method should be encouraged for implementation in other regions of Vietnam”
t0“Rice”
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