Abstract
Nitrogen (N) application rates and planting density are key factors affecting grain yield and quality. In this experiment, four varieties, Huijing 753 (HJ 753), Huijing 855 (HJ 855), Huijing 866 (HJ 866), and Dangjing 8 (DJ 8), were used to investigate their effects on the yield and quality of japonica rice in Anhui, which has a lower soil N supply capacity. The current study set four levels of N application N1, N2, N3, and N4 (120, 180, 240, and 300) kg ha−1 and three planting densities D1, D2, and D3 (high-density: 45 × 104; medium-density: 37.5 × 104; low-density: 32.2 × 104) hills ha−1 for a total of 12 treatments. The effects of N application and planting density on rice yield, composition, processing quality, appearance quality, and cooking quality were analyzed. The results showed that with the increase in N application rates and planting density, the effective panicle number per plant and grain number per panicle of each rice variety increased, while HJ 753, HJ 855, and HJ 866 reached the highest yield under the N3D1 treatment and then gradually declined, and DJ 8 had the highest yield in the N4D1 treatment. In addition, the processing quality of various varieties can be improved by increasing the N application rate and planting density, but the appearance quality will deteriorate, the amylose content will also decrease, and gel consistency will also be lower. Therefore, under medium-planting density conditions, N at a rate of 240 kg ha−1 was the best for HJ 753, HJ 855, and HJ 866, and using 300 kg ha−1 for DJ 8 resulted in high grain yields and superior rice grain quality. In the next step, physiological, biochemical, and genotypic analyses of these three japonica rice varieties were carried out to provide a scientific basis and technical support for accelerating the breeding of high-yield japonica rice varieties.
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Claims 9
Claim · model-written summary
Increasing N application rate and planting density increased the effective panicle number per plant and the grain number per panicle of each rice variety.
- Taxon
- Oryza sativa
Oryza sativat0 - Treatment
- N application rates and planting densitye1
- Outcome
- effective panicle number per plant and grain number per paniclee1
- Direction
- increasede1
- Setting
- Anhuie0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impact of Key Agronomic Traits on Economic Yield Traits in Anhui Rice (Oryza sativa L. spp. japonica)”
e1“The results showed that with the increase in N application rates and planting density, the effective panicle number per plant and grain number per panicle of each rice variety increased”
e0“to investigate their effects on the yield and quality of japonica rice in Anhui, which has a lower soil N supply capacity”
Claim · model-written summary
Increasing N application rate and planting density improved the processing quality of rice.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- increasing the N application rate and planting densitye2
- Outcome
- processing qualitye2
- Direction
- improvede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impact of Key Agronomic Traits on Economic Yield Traits in Anhui Rice (Oryza sativa L. spp. japonica)”
e2“In addition, the processing quality of various varieties can be improved by increasing the N application rate and planting density, but the appearance quality will deteriorate, the amylose content will also decrease, and gel consistency will also be lower”
Claim · model-written summary
Increasing N application rate and planting density will deteriorate the appearance quality of rice.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- increasing the N application rate and planting densitye2
- Outcome
- appearance qualitye2
- Direction
- will deterioratee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impact of Key Agronomic Traits on Economic Yield Traits in Anhui Rice (Oryza sativa L. spp. japonica)”
e2“In addition, the processing quality of various varieties can be improved by increasing the N application rate and planting density, but the appearance quality will deteriorate, the amylose content will also decrease, and gel consistency will also be lower”
Claim · model-written summary
Increasing N application rate and planting density decreased the amylose content of rice grain.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- increasing the N application rate and planting densitye2
- Outcome
- amylose contente2
- Direction
- decreasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impact of Key Agronomic Traits on Economic Yield Traits in Anhui Rice (Oryza sativa L. spp. japonica)”
e2“In addition, the processing quality of various varieties can be improved by increasing the N application rate and planting density, but the appearance quality will deteriorate, the amylose content will also decrease, and gel consistency will also be lower”
Claim · model-written summary
Increasing N application rate and planting density lowered the gel consistency of rice grain.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- increasing the N application rate and planting densitye2
- Outcome
- gel consistencye2
- Direction
- lowere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impact of Key Agronomic Traits on Economic Yield Traits in Anhui Rice (Oryza sativa L. spp. japonica)”
e2“In addition, the processing quality of various varieties can be improved by increasing the N application rate and planting density, but the appearance quality will deteriorate, the amylose content will also decrease, and gel consistency will also be lower”
Claim · model-written summary
HJ 753, HJ 855 and HJ 866 reached the highest yield under the N3D1 treatment and then gradually declined.
- Taxon
- Oryza sativaOryza sativat0
- Material
- HJ 753, HJ 855, and HJ 866e3
- Treatment
- N3D1 treatmente3
- Outcome
- yielde3
- Direction
- higheste3
- Qualifier
- then gradually declinede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impact of Key Agronomic Traits on Economic Yield Traits in Anhui Rice (Oryza sativa L. spp. japonica)”
e3“while HJ 753, HJ 855, and HJ 866 reached the highest yield under the N3D1 treatment and then gradually declined, and DJ 8 had the highest yield in the N4D1 treatment”
Claim · model-written summary
DJ 8 had the highest yield under the N4D1 treatment.
- Taxon
- Oryza sativaOryza sativat0
- Material
- DJ 8e3
- Treatment
- N4D1 treatmente3
- Outcome
- yielde3
- Direction
- higheste3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impact of Key Agronomic Traits on Economic Yield Traits in Anhui Rice (Oryza sativa L. spp. japonica)”
e3“while HJ 753, HJ 855, and HJ 866 reached the highest yield under the N3D1 treatment and then gradually declined, and DJ 8 had the highest yield in the N4D1 treatment”
Claim · model-written summary
Under medium-planting density, N at 240 kg ha−1 is the best rate for HJ 753, HJ 855 and HJ 866.
- Taxon
- Oryza sativaOryza sativat0
- Material
- HJ 753, HJ 855, and HJ 866e4
- Outcome
- N at a rate of 240 kg ha−1 was the beste4
- Qualifier
- under medium-planting density conditionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impact of Key Agronomic Traits on Economic Yield Traits in Anhui Rice (Oryza sativa L. spp. japonica)”
e4“Therefore, under medium-planting density conditions, N at a rate of 240 kg ha−1 was the best for HJ 753, HJ 855, and HJ 866, and using 300 kg ha−1 for DJ 8 resulted in high grain yields and superior rice grain quality”
Claim · model-written summary
Using 300 kg ha−1 N for DJ 8 resulted in high grain yields and superior rice grain quality.
- Taxon
- Oryza sativaOryza sativat0
- Material
- DJ 8e4
- Treatment
- using 300 kg ha−1e4
- Outcome
- high grain yields and superior rice grain qualitye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impact of Key Agronomic Traits on Economic Yield Traits in Anhui Rice (Oryza sativa L. spp. japonica)”
e4“Therefore, under medium-planting density conditions, N at a rate of 240 kg ha−1 was the best for HJ 753, HJ 855, and HJ 866, and using 300 kg ha−1 for DJ 8 resulted in high grain yields and superior rice grain quality”
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