Abstract
By setting four different nitrogen levels for field trials and combining with laboratory analysis,the agronomic traits and nitrogen use efficiency of double-cropping rice under different nitrogen fertilizer rates in southern Hunan were researched.The results showed that increasing nitrogen fertilizer rate for early rice can increase effective panicle number and total grain number per panicle,but filled grain number,seed setting rate,1 000 grains weight had the decreasing tendency;increasing nitrogen fertilizer rate for late rice decreased effective panicle number,seed setting rate and 1 000 grains weight,but increased total grain number per panicle.Increasing nitrogen fertilizer rate can increase yield and net income of early rice,of which the highest yield and economical nitrogen fertilizer rate were 240.7 kg/hm2 and 220.1 kg/hm2 respectively;the yield and net income of late rice decreased with increasing nitrogen fertilizer rate,of which the highest in nitrogen reducing treatment,and the highest yield and economical nitrogen fertilizer rate were 122.3 kg/hm2 and 104.2 kg/hm2 respectively.Increasing nitrogen fertilizer rate also can increase nitrogen absorption and use efficiency of early rice,but had no significant effect on nitrogen absorption and use efficiency of late rice.
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Claims 13
Claim · model-written summary
Higher nitrogen increased effective panicle and total grain numbers in early rice.
- Taxon
- early ricee0
- Treatment
- increasing nitrogen fertilizer ratee0
- Outcome
- effective panicle number and total grain number per paniclee0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“increasing nitrogen fertilizer rate for early rice can increase effective panicle number and total grain number per panicle,but filled grain number,seed setting rate,1 000 grains weight had the decreasing tendency”
Claim · model-written summary
Higher nitrogen tended to decrease filled grain number, seed setting rate, and thousand grain weight in early rice.
- Taxon
- Rice
Oryza sativat0 - Treatment
- nitrogen fertilizer ratee0
- Outcome
- filled grain number,seed setting rate,1 000 grains weighte0
- Direction
- decreasing tendencye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing nitrogen fertilizer rate for early rice can increase effective panicle number and total grain number per panicle,but filled grain number,seed setting rate,1 000 grains weight had the decreasing tendency”
t0“Rice”
Claim · model-written summary
Higher nitrogen decreased effective panicle number, seed setting rate, and thousand grain weight in late rice.
- Taxon
- late ricee0
- Treatment
- increasing nitrogen fertilizer ratee0
- Outcome
- effective panicle number,seed setting rate and 1 000 grains weighte0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“increasing nitrogen fertilizer rate for late rice decreased effective panicle number,seed setting rate and 1 000 grains weight,but increased total grain number per panicle”
Claim · model-written summary
Higher nitrogen increased total grain number per panicle in late rice.
- Taxon
- late ricee0
- Treatment
- increasing nitrogen fertilizer ratee0
- Outcome
- total grain number per paniclee0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“increasing nitrogen fertilizer rate for late rice decreased effective panicle number,seed setting rate and 1 000 grains weight,but increased total grain number per panicle”
Claim · model-written summary
Higher nitrogen increased early rice yield and net income.
- Taxon
- early ricee0
- Treatment
- Increasing nitrogen fertilizer ratee0
- Outcome
- yield and net incomee0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“Increasing nitrogen fertilizer rate can increase yield and net income of early rice,of which the highest yield and economical nitrogen fertilizer rate were 240.7 kg/hm2 and 220.1 kg/hm2 respectively”
Claim · model-written summary
The highest yield for early rice was associated with 240.7 kg/hm2.
- Taxon
- RiceOryza sativat0
- Outcome
- highest yielde0
- Value
- 240.7 kg/hm2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen fertilizer rate can increase yield and net income of early rice,of which the highest yield and economical nitrogen fertilizer rate were 240.7 kg/hm2 and 220.1 kg/hm2 respectively”
t0“Rice”
Claim · model-written summary
The economical nitrogen fertilizer rate for early rice was associated with 220.1 kg/hm2.
- Taxon
- RiceOryza sativat0
- Outcome
- economical nitrogen fertilizer ratee0
- Value
- 220.1 kg/hm2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen fertilizer rate can increase yield and net income of early rice,of which the highest yield and economical nitrogen fertilizer rate were 240.7 kg/hm2 and 220.1 kg/hm2 respectively”
t0“Rice”
Claim · model-written summary
The highest yield for late rice was associated with 122.3 kg/hm2.
- Taxon
- RiceOryza sativat0
- Outcome
- highest yielde0
- Value
- 122.3 kg/hm2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield and net income of late rice decreased with increasing nitrogen fertilizer rate,of which the highest in nitrogen reducing treatment,and the highest yield and economical nitrogen fertilizer rate were 122.3 kg/hm2 and 104.2 kg/hm2 respectively”
t0“Rice”
Claim · model-written summary
The economical nitrogen fertilizer rate for late rice was associated with 104.2 kg/hm2.
- Taxon
- RiceOryza sativat0
- Outcome
- economical nitrogen fertilizer ratee0
- Value
- 104.2 kg/hm2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield and net income of late rice decreased with increasing nitrogen fertilizer rate,of which the highest in nitrogen reducing treatment,and the highest yield and economical nitrogen fertilizer rate were 122.3 kg/hm2 and 104.2 kg/hm2 respectively”
t0“Rice”
Claim · model-written summary
Higher nitrogen decreased late rice yield and net income.
- Taxon
- late ricee0
- Treatment
- increasing nitrogen fertilizer ratee0
- Outcome
- yield and net incomee0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“the yield and net income of late rice decreased with increasing nitrogen fertilizer rate,of which the highest in nitrogen reducing treatment,and the highest yield and economical nitrogen fertilizer rate were 122.3 kg/hm2 and 104.2 kg/hm2 respectively”
Claim · model-written summary
Late rice yield and net income were highest under nitrogen reduction.
Verbatim
e0“the yield and net income of late rice decreased with increasing nitrogen fertilizer rate,of which the highest in nitrogen reducing treatment,and the highest yield and economical nitrogen fertilizer rate were 122.3 kg/hm2 and 104.2 kg/hm2 respectively”
Claim · model-written summary
Higher nitrogen increased early rice nitrogen absorption and use efficiency.
- Taxon
- early ricee0
- Treatment
- Increasing nitrogen fertilizer ratee0
- Outcome
- nitrogen absorption and use efficiencye0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“Increasing nitrogen fertilizer rate also can increase nitrogen absorption and use efficiency of early rice,but had no significant effect on nitrogen absorption and use efficiency of late rice.”
Claim · model-written summary
Higher nitrogen had no significant effect on late rice nitrogen absorption and use efficiency.
- Taxon
- late ricee0
- Treatment
- Increasing nitrogen fertilizer ratee0
- Outcome
- nitrogen absorption and use efficiencye0
Not reportedComparatorDirection
Verbatim
e0“Increasing nitrogen fertilizer rate also can increase nitrogen absorption and use efficiency of early rice,but had no significant effect on nitrogen absorption and use efficiency of late rice.”
The same questions in other papers
fertilization · yield · Oryza sativa (rice)Positive and negative results
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