Abstract
The objective of this study was to examine the impact of starter nitrogen fertilizer on soybean root activity, leaf photosynthesis, grain yield and their relationship. To achieve this objective, field experiments were conducted in 2013 and 2014, using a randomized complete block design, with three replications. Nitrogen was applied at planting at rates of 0, 25, 50, and 75 kg N ha-1. In both years, starter nitrogen fertilizer benefited root activity, leaf photosynthesis, and consequently its yield. Statistically significant correlation was found among root activity, leaf photosynthetic rate, and grain yield at the developmental stage. The application of N25, N50, and N75 increased grain yield by 1.28%, 2.47%, and 1.58% in 2013 and by 0.62%, 2.77%, and 2.06% in 2014 compared to the N0 treatment. Maximum grain yield of 3238.91 kg ha-1 in 2013 and 3086.87 kg ha-1 in 2014 were recorded for N50 treatment. Grain yield was greater for 2013 than 2014, possibly due to more favorable environmental conditions. This research indicated that applying nitrogen as starter is necessary to increase soybean yield in Sangjiang River Plain in China.
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Claims 13
Claim · model-written summary
Starter nitrogen benefited soybean root activity.
- Taxon
- soybean
Glycine maxt0 - Treatment
- starter nitrogen fertilizere0
- Outcome
- root activitye0
- Direction
- benefitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“starter nitrogen fertilizer benefited root activity, leaf photosynthesis, and consequently its yield”
t0“soybean”
Claim · model-written summary
Starter nitrogen benefited soybean leaf photosynthesis.
- Taxon
- soybeanGlycine maxt0
- Treatment
- starter nitrogen fertilizere0
- Outcome
- leaf photosynthesise0
- Direction
- benefitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“starter nitrogen fertilizer benefited root activity, leaf photosynthesis, and consequently its yield”
t0“soybean”
Claim · model-written summary
Root activity, leaf photosynthetic rate and grain yield were significantly correlated.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- developmental stagee0
- Outcome
- grain yielde0
- Qualifier
- root activity, leaf photosynthetic ratee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Statistically significant correlation was found among root activity, leaf photosynthetic rate, and grain yield at the developmental stage”
t0“soybean”
Claim · model-written summary
N25 increased soybean grain yield by 1.28% in 2013 relative to N0.
- Taxon
- soybeanGlycine maxt0
- Treatment
- N25e0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 1.28%e0
- Qualifier
- 2013e0
- Comparator
- N0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N25, N50, and N75 increased grain yield by 1.28%, 2.47%, and 1.58% in 2013 and by 0.62%, 2.77%, and 2.06% in 2014 compared to the N0 treatment”
t0“soybean”
Claim · model-written summary
N50 increased soybean grain yield by 2.47% in 2013 relative to N0.
- Taxon
- soybeanGlycine maxt0
- Treatment
- N50e0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 2.47%e0
- Qualifier
- 2013e0
- Comparator
- N0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N25, N50, and N75 increased grain yield by 1.28%, 2.47%, and 1.58% in 2013 and by 0.62%, 2.77%, and 2.06% in 2014 compared to the N0 treatment”
t0“soybean”
Claim · model-written summary
N75 increased soybean grain yield by 1.58% in 2013 relative to N0.
- Taxon
- soybeanGlycine maxt0
- Treatment
- N75e0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 1.58%e0
- Qualifier
- 2013e0
- Comparator
- N0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N25, N50, and N75 increased grain yield by 1.28%, 2.47%, and 1.58% in 2013 and by 0.62%, 2.77%, and 2.06% in 2014 compared to the N0 treatment”
t0“soybean”
Claim · model-written summary
N25 increased soybean grain yield by 0.62% in 2014 relative to N0.
- Taxon
- soybeanGlycine maxt0
- Treatment
- N25e0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 0.62%e0
- Qualifier
- 2014e0
- Comparator
- N0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N25, N50, and N75 increased grain yield by 1.28%, 2.47%, and 1.58% in 2013 and by 0.62%, 2.77%, and 2.06% in 2014 compared to the N0 treatment”
t0“soybean”
Claim · model-written summary
N50 increased soybean grain yield by 2.77% in 2014 relative to N0.
- Taxon
- soybeanGlycine maxt0
- Treatment
- N50e0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 2.77%e0
- Qualifier
- 2014e0
- Comparator
- N0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N25, N50, and N75 increased grain yield by 1.28%, 2.47%, and 1.58% in 2013 and by 0.62%, 2.77%, and 2.06% in 2014 compared to the N0 treatment”
t0“soybean”
Claim · model-written summary
N75 increased soybean grain yield by 2.06% in 2014 relative to N0.
- Taxon
- soybeanGlycine maxt0
- Treatment
- N75e0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 2.06%e0
- Qualifier
- 2014e0
- Comparator
- N0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N25, N50, and N75 increased grain yield by 1.28%, 2.47%, and 1.58% in 2013 and by 0.62%, 2.77%, and 2.06% in 2014 compared to the N0 treatment”
t0“soybean”
Claim · model-written summary
Maximum soybean grain yield under N50 was 3238.91 kg ha-1 in 2013.
- Taxon
- soybeanGlycine maxt0
- Treatment
- N50 treatmente0
- Outcome
- grain yielde0
- Direction
- Maximume0
- Value
- 3238.91 kg ha-1e0
- Qualifier
- 2013e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum grain yield of 3238.91 kg ha-1 in 2013 and 3086.87 kg ha-1 in 2014 were recorded for N50 treatment”
t0“soybean”
Claim · model-written summary
Maximum soybean grain yield under N50 was 3086.87 kg ha-1 in 2014.
- Taxon
- soybeanGlycine maxt0
- Treatment
- N50 treatmente0
- Outcome
- grain yielde0
- Direction
- Maximume0
- Value
- 3086.87 kg ha-1e0
- Qualifier
- 2014e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum grain yield of 3238.91 kg ha-1 in 2013 and 3086.87 kg ha-1 in 2014 were recorded for N50 treatment”
t0“soybean”
Claim · model-written summary
Soybean grain yield was greater in 2013 than 2014.
- Taxon
- soybeanGlycine maxt0
- Outcome
- Grain yielde0
- Direction
- greatere0
- Qualifier
- possibly due to more favorable environmental conditionse0
- Comparator
- 2014e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield was greater for 2013 than 2014, possibly due to more favorable environmental conditions”
t0“soybean”
Claim · model-written summary
The authors recommend starter nitrogen to increase soybean yield in the Sangjiang River Plain.
- Taxon
- soybeanGlycine maxe0
- Outcome
- applying nitrogen as startere0
- Setting
- Sangjiang River Plain in Chinae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applying nitrogen as starter is necessary to increase soybean yield in Sangjiang River Plain in China”
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