Abstract
Reducing nitrate concentration and improving the quality of vegetable crops have been two areas of major research efforts.The aim of this study is to determine the effects of adding a nitrification inhibitor dicyandiamide(DCD)to urea on the growth and quality of rape plants in a pot experiment.The amount of DCD added was equivalent to 1%,2%,3%,4% and 5% of the total nitrogen(N)applied.Results showed that DCD significantly increased crop yield by 22.77%～33.5%,and decreased nitrate concentration in the crop by 14.9%～30.51%.Rape Vc,total N and total P concentrations were also increased by the DCD treatments.There was a trend of higher water soluble sugar in the plant when the amount of DCD was 3% of the total N applied,but when the DCD was greater than 4% of the total N applied,the water soluble sugar concentration decreased.The highest N uptake and N recovery by the plant was when the amount of DCD added was at 3% of the total urea-N applied.Therefore,suitable amount of DCD applied could not only reduce nitrate content and increase yield,but also improve rape quality.
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Claims 6
Claim · model-written summary
DCD increased rape yield by 22.77%～33.5%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“DCD significantly increased crop yield by 22.77%～33.5%”
t0“Rape”
Claim · model-written summary
DCD decreased rape nitrate concentration by 14.9%～30.51%.
- Taxon
- Rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- DCDe1
- Outcome
- nitrate concentratione0
- Direction
- decreasede0
- Value
- 14.9%～30.51%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased nitrate concentration in the crop by 14.9%～30.51%”
e1“DCD significantly increased crop yield by 22.77%～33.5%”
t0“Rape”
Claim · model-written summary
DCD increased rape Vc, total N and total P concentrations.
- Taxon
- RapeBrassica napuse0
- Treatment
- DCD treatmentse0
- Outcome
- Vc,total N and total P concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rape Vc,total N and total P concentrations were also increased by the DCD treatments”
Claim · model-written summary
At 3% of total N, DCD tended to raise water soluble sugar.
- Taxon
- rapeBrassica napust0
- Treatment
- DCD was 3% of the total N appliede0
- Outcome
- water soluble sugare0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher water soluble sugar in the plant when the amount of DCD was 3% of the total N applied”
t0“Rape”
Claim · model-written summary
Above 4% of total N, DCD decreased water soluble sugar concentration.
- Taxon
- rapeBrassica napust0
- Treatment
- DCD was greater than 4% of the total N appliede0
- Outcome
- water soluble sugar concentratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the DCD was greater than 4% of the total N applied,the water soluble sugar concentration decreased”
t0“Rape”
Claim · model-written summary
N uptake and N recovery were highest at 3% DCD of urea N.
- Taxon
- rapeBrassica napust0
- Treatment
- DCD added was at 3% of the total urea-N appliede0
- Outcome
- N uptake and N recoverye0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest N uptake and N recovery by the plant was when the amount of DCD added was at 3% of the total urea-N applied”
t0“Rape”
The same questions in other papers
cyanoguanidine · nutrient: content · Brassica napus (oilseed rape)Results agree
1 paper in the same direction as this paper
- positive
cyanoguanidine · yield · Brassica napus (oilseed rape)Results agree
1 paper in the same direction as this paper
- positive
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.