Abstract
It was investigated that different nitrogen managements affected crop yield,nitrogen uptake,nitrogen balance and net profit of spring maize production in two years' field experiment in Jilin maize belt.The results showed that compared with famers' practice(FP),the grain yield and nitrogen uptake under ecological intensification nutrient management(EI) which reducing N fertilizer by 28% were not decreased while the recovery efficiency,agronomic efficiency and partial factor productivity of nitrogen and net profit were increased by 48.1%,56.9%,43.8% and 11.0%,respectively.The grain yield and nitrogen utilization have no significant effect in the second year when no nitrogen fertilizer was applied in the first year.Apparent nitrogen loss of EI and FP in two crops was 97 and 226 kg/ha,respectively.The nitrogen management based on agronomic efficiency of fertilizer,crop target yield and the response of crop to fertilizer application could be a feasible N management practice for both high yield production and environmental protection.
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Claims 10
Claim · model-written summary
Ecological intensification with 28% less N did not decrease maize grain yield relative to farmer practice.
- Treatment
- ecological intensification nutrient management(EI) which reducing N fertilizer by 28%e0
- Outcome
- grain yielde0
- Direction
- not decreasede0
- Comparator
- famers' practice(FP)e0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with famers' practice(FP),the grain yield and nitrogen uptake under ecological intensification nutrient management(EI) which reducing N fertilizer by 28% were not decreased”
t0“spring maize”
Claim · model-written summary
Ecological intensification with 28% less N did not decrease maize N uptake relative to farmer practice.
- Treatment
- ecological intensification nutrient management(EI) which reducing N fertilizer by 28%e0
- Outcome
- nitrogen uptakee0
- Direction
- not decreasede0
- Comparator
- famers' practice(FP)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with famers' practice(FP),the grain yield and nitrogen uptake under ecological intensification nutrient management(EI) which reducing N fertilizer by 28% were not decreased”
t0“spring maize”
Claim · model-written summary
Ecological intensification increased recovery efficiency by 48.1% relative to farmer practice.
- Treatment
- ecological intensification nutrient management(EI)e0
- Outcome
- recovery efficiencye0
- Direction
- increasede0
- Value
- 48.1%e0
- Comparator
- famers' practice(FP)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with famers' practice(FP),the grain yield and nitrogen uptake under ecological intensification nutrient management(EI) which reducing N fertilizer by 28% were not decreased while the recovery efficiency,agronomic efficiency and partial factor productivity of nitrogen and net profit were increased by 48.1%,56.9%,43.8% and 11.0%,respectively.”
t0“spring maize”
Claim · model-written summary
Ecological intensification increased agronomic efficiency by 56.9% relative to farmer practice.
- Treatment
- ecological intensification nutrient management(EI)e0
- Outcome
- agronomic efficiencye0
- Direction
- increasede0
- Value
- 56.9%e0
- Comparator
- famers' practice(FP)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with famers' practice(FP),the grain yield and nitrogen uptake under ecological intensification nutrient management(EI) which reducing N fertilizer by 28% were not decreased while the recovery efficiency,agronomic efficiency and partial factor productivity of nitrogen and net profit were increased by 48.1%,56.9%,43.8% and 11.0%,respectively.”
t0“spring maize”
Claim · model-written summary
Ecological intensification increased partial factor productivity of nitrogen by 43.8% relative to farmer practice.
- Treatment
- ecological intensification nutrient management(EI)e0
- Outcome
- partial factor productivity of nitrogene0
- Direction
- increasede0
- Value
- 43.8%e0
- Comparator
- famers' practice(FP)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with famers' practice(FP),the grain yield and nitrogen uptake under ecological intensification nutrient management(EI) which reducing N fertilizer by 28% were not decreased while the recovery efficiency,agronomic efficiency and partial factor productivity of nitrogen and net profit were increased by 48.1%,56.9%,43.8% and 11.0%,respectively.”
t0“spring maize”
Claim · model-written summary
Ecological intensification increased net profit by 11.0% relative to farmer practice.
- Treatment
- ecological intensification nutrient management(EI)e0
- Outcome
- net profite0
- Direction
- increasede0
- Value
- 11.0%e0
- Comparator
- famers' practice(FP)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with famers' practice(FP),the grain yield and nitrogen uptake under ecological intensification nutrient management(EI) which reducing N fertilizer by 28% were not decreased while the recovery efficiency,agronomic efficiency and partial factor productivity of nitrogen and net profit were increased by 48.1%,56.9%,43.8% and 11.0%,respectively.”
t0“spring maize”
Claim · model-written summary
Without N fertilizer in the first year, second-year grain yield showed no significant effect.
- Treatment
- no nitrogen fertilizer was applied in the first yeare0
- Outcome
- grain yielde0
- Direction
- no significant effecte0
- Qualifier
- in the second yeare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield and nitrogen utilization have no significant effect in the second year when no nitrogen fertilizer was applied in the first year.”
t0“spring maize”
Claim · model-written summary
Without N fertilizer in the first year, second-year nitrogen utilization showed no significant effect.
- Treatment
- no nitrogen fertilizer was applied in the first yeare0
- Outcome
- nitrogen utilizatione0
- Direction
- no significant effecte0
- Qualifier
- in the second yeare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield and nitrogen utilization have no significant effect in the second year when no nitrogen fertilizer was applied in the first year.”
t0“spring maize”
Claim · model-written summary
Apparent N loss was 97 kg/ha under EI, versus 226 kg/ha under FP.
- Treatment
- EIe0
- Outcome
- Apparent nitrogen losse0
- Direction
- lowerinferrede0
- Value
- 97 and 226 kg/hae0
- Comparator
- FPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apparent nitrogen loss of EI and FP in two crops was 97 and 226 kg/ha,respectively.”
t0“spring maize”
Claim · model-written summary
The authors consider management based on agronomic efficiency, target yield and fertilizer response feasible for yield and environmental protection.
- Outcome
- feasible N management practice for both high yield production and environmental protectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogen management based on agronomic efficiency of fertilizer,crop target yield and the response of crop to fertilizer application could be a feasible N management practice for both high yield production and environmental protection.”
t0“spring maize”
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