Abstract
Three different cultivars,premature cultivars Luyuandan 14,medium cultivars Yedan 22 and late maturing cultivars Yedan 13,were chosen to study the effects of different maize cultivars on nitrogen(N) use characteristic and yield of relay-planted spring-sown and summer-sown maize compared with those of mono-planted.The results indicated that the N uptake of spring-sown maize was increased with longer growth duration.But when the longer growth duration cultivars of spring-sown maize with highest N uptake ability were used in relay-cropping, the N uptake by summer-sown maize were decreased obviously,which was not benefit to increase the annual yield.The N uptake efficiency(N accumulation in plant /N supplied,NUPE),N use efficiency(grain yield/N accumulation in plant, NUE) and N harvest index(N accumulation in grain/N accumulation in plant,NHI) were higher under relay-cropping than under sole cropping,while the N production efficiency(grain yield/N supplied,NPE) of relay cropping was between the range of spring-sown maize and summer-sown maize under sole cropping.Relay cropping of spring-sown maize with suitable N uptake ability and summer-sown maize with highest N uptake ability could enhance the advantages of the cropping system.The average land equivalent ratio for N yield of cropping system relay-planted with spring-sown maize of Luyuandan 14,Yedan 22,and Yedan 13 were 2.46,1.63,and 2.04,respectively.While those for biomass yield were 1.91,1.60,and 1.78,respectively.The relay cropping modes with higher N yield and biomass yield were Yedan 13/Yedan 22,Yedan 13/Yedan 13,and Luyuandan 14/Yedan 13.Compared with sole cropping maize,the relay-cropping system can get higher N productive ability and biomass yield by using more suitable cultivars.
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Claims 15
Claim · model-written summary
Spring-sown maize N uptake increased with longer growth duration.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results indicated that the N uptake of spring-sown maize was increased with longer growth duration.”
Claim · model-written summary
Using longer duration spring maize in relay cropping decreased summer maize N uptake.
- Treatment
- longer growth duration cultivars of spring-sown maizee0
- Outcome
- N uptake by summer-sown maizee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“But when the longer growth duration cultivars of spring-sown maize with highest N uptake ability were used in relay-cropping, the N uptake by summer-sown maize were decreased obviously,which was not benefit to increase the annual yield.”
Claim · model-written summary
N uptake efficiency was higher under relay cropping.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N uptake efficiency(N accumulation in plant /N supplied,NUPE),N use efficiency(grain yield/N accumulation in plant, NUE) and N harvest index(N accumulation in grain/N accumulation in plant,NHI) were higher under relay-cropping than under sole cropping,while the N production efficiency(grain yield/N supplied,NPE) of relay cropping was between the range of spring-sown maize and summer-sown maize under sole cropping.”
t0“Maize”
Claim · model-written summary
N use efficiency was higher under relay cropping.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N uptake efficiency(N accumulation in plant /N supplied,NUPE),N use efficiency(grain yield/N accumulation in plant, NUE) and N harvest index(N accumulation in grain/N accumulation in plant,NHI) were higher under relay-cropping than under sole cropping,while the N production efficiency(grain yield/N supplied,NPE) of relay cropping was between the range of spring-sown maize and summer-sown maize under sole cropping.”
t0“Maize”
Claim · model-written summary
N harvest index was higher under relay cropping.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N uptake efficiency(N accumulation in plant /N supplied,NUPE),N use efficiency(grain yield/N accumulation in plant, NUE) and N harvest index(N accumulation in grain/N accumulation in plant,NHI) were higher under relay-cropping than under sole cropping,while the N production efficiency(grain yield/N supplied,NPE) of relay cropping was between the range of spring-sown maize and summer-sown maize under sole cropping.”
t0“Maize”
Claim · model-written summary
N production efficiency under relay cropping lay between sole-crop values.
- Treatment
- relay croppinge0
- Outcome
- N production efficiencye0
- Direction
- betweene0
- Comparator
- sole croppinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N uptake efficiency(N accumulation in plant /N supplied,NUPE),N use efficiency(grain yield/N accumulation in plant, NUE) and N harvest index(N accumulation in grain/N accumulation in plant,NHI) were higher under relay-cropping than under sole cropping,while the N production efficiency(grain yield/N supplied,NPE) of relay cropping was between the range of spring-sown maize and summer-sown maize under sole cropping.”
t0“Maize”
Claim · model-written summary
Luyuandan 14 relay cropping had land equivalent ratio 2.46 for N yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average land equivalent ratio for N yield of cropping system relay-planted with spring-sown maize of Luyuandan 14,Yedan 22,and Yedan 13 were 2.46,1.63,and 2.04,respectively.While those for biomass yield were 1.91,1.60,and 1.78,respectively.”
Claim · model-written summary
Yedan 22 relay cropping had land equivalent ratio 1.63 for N yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average land equivalent ratio for N yield of cropping system relay-planted with spring-sown maize of Luyuandan 14,Yedan 22,and Yedan 13 were 2.46,1.63,and 2.04,respectively.While those for biomass yield were 1.91,1.60,and 1.78,respectively.”
Claim · model-written summary
Yedan 13 relay cropping had land equivalent ratio 2.04 for N yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average land equivalent ratio for N yield of cropping system relay-planted with spring-sown maize of Luyuandan 14,Yedan 22,and Yedan 13 were 2.46,1.63,and 2.04,respectively.While those for biomass yield were 1.91,1.60,and 1.78,respectively.”
Claim · model-written summary
Luyuandan 14 relay cropping had land equivalent ratio 1.91 for biomass yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average land equivalent ratio for N yield of cropping system relay-planted with spring-sown maize of Luyuandan 14,Yedan 22,and Yedan 13 were 2.46,1.63,and 2.04,respectively.While those for biomass yield were 1.91,1.60,and 1.78,respectively.”
Claim · model-written summary
Yedan 22 relay cropping had land equivalent ratio 1.60 for biomass yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average land equivalent ratio for N yield of cropping system relay-planted with spring-sown maize of Luyuandan 14,Yedan 22,and Yedan 13 were 2.46,1.63,and 2.04,respectively.While those for biomass yield were 1.91,1.60,and 1.78,respectively.”
Claim · model-written summary
Yedan 13 relay cropping had land equivalent ratio 1.78 for biomass yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average land equivalent ratio for N yield of cropping system relay-planted with spring-sown maize of Luyuandan 14,Yedan 22,and Yedan 13 were 2.46,1.63,and 2.04,respectively.While those for biomass yield were 1.91,1.60,and 1.78,respectively.”
Claim · model-written summary
Yedan 13/Yedan 22 had higher N and biomass yields.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relay cropping modes with higher N yield and biomass yield were Yedan 13/Yedan 22,Yedan 13/Yedan 13,and Luyuandan 14/Yedan 13.”
t0“Maize”
Claim · model-written summary
Yedan 13/Yedan 13 had higher N and biomass yields.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relay cropping modes with higher N yield and biomass yield were Yedan 13/Yedan 22,Yedan 13/Yedan 13,and Luyuandan 14/Yedan 13.”
t0“Maize”
Claim · model-written summary
Luyuandan 14/Yedan 13 had higher N and biomass yields.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relay cropping modes with higher N yield and biomass yield were Yedan 13/Yedan 22,Yedan 13/Yedan 13,and Luyuandan 14/Yedan 13.”
t0“Maize”
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