Abstract
Conventional fertilization with most N applied before or during early maize ( Zea mays L.) growth stages can negatively affect production if soil N is insufficient after silking. Here, drip irrigation with a split application of N (drip fertigation) was evaluated to determine whether the effect on yield and N use efficiency (NUE) differs with cropping practice. Compared with conventional fertilization, drip fertigation increased yield by 13 and 14% at a low planting density under a low N rate (L) and by 15% at a high planting density under a high N rate (H) in 2012 and 2013, respectively. Yield increases under drip fertigation were attributed to 18 and 17% increases in postsilking dry matter (DM) accumulation under L, and 12 and 10% increases in presilking DM accumulation, and 17 and 16% increases in postsilking DM accumulation under H in 2012 and 2013, respectively. Increased postsilking N accumulation under drip fertigation, promoted by greater root length and soil mineral N after silking, maintained increased leaf area index (LAI) and DM accumulation rate to improve postsilking DM accumulation under L. Greater N accumulation under drip fertigation from the 12‐leaf stage to silking and after silking promoted greater LAI and DM accumulation rate to increase pre‐ and postsilking DM accumulation under H. Because of greater grain yield and N uptake and less water consumption, drip irrigation improved NUE and irrigation water use efficiency. Drip fertigation can effectively improving maize grain yield and NUE resulting from improved DM accumulation with increased early‐season N uptake.
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Claims 10
Claim · model-written summary
Drip fertigation increased maize yield by 13 and 14% at a low planting density under a low N rate compared with conventional fertilization.
- Treatment
- drip fertigatione1
- Outcome
- yielde1
- Direction
- increasede1
- Value
- 13 and 14%e1
- Qualifier
- at a low planting density under a low N rate (L)e1
- Comparator
- conventional fertilizatione1
- Setting
- 2012 and 2013e1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Compared with conventional fertilization, drip fertigation increased yield by 13 and 14% at a low planting density under a low N rate (L) and by 15% at a high planting density under a high N rate (H) in 2012 and 2013, respectively”
e2“Conventional fertilization with most N applied before or during early maize ( Zea mays L.) growth stages can negatively affect production”
Claim · model-written summary
Drip fertigation increased maize yield by 15% at a high planting density under a high N rate compared with conventional fertilization.
- Treatment
- drip fertigatione1
- Outcome
- yielde1
- Direction
- increasede1
- Value
- 15%e1
- Qualifier
- at a high planting density under a high N rate (H)e1
- Comparator
- conventional fertilizatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Compared with conventional fertilization, drip fertigation increased yield by 13 and 14% at a low planting density under a low N rate (L) and by 15% at a high planting density under a high N rate (H) in 2012 and 2013, respectively”
e2“Conventional fertilization with most N applied before or during early maize ( Zea mays L.) growth stages can negatively affect production”
Claim · model-written summary
Drip fertigation increased postsilking dry matter accumulation by 18 and 17% under a low N rate.
- Treatment
- drip fertigatione3
- Outcome
- postsilking dry matter (DM) accumulatione3
- Direction
- increasese3
- Value
- 18 and 17%e3
- Qualifier
- under Le3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Yield increases under drip fertigation were attributed to 18 and 17% increases in postsilking dry matter (DM) accumulation under L, and 12 and 10% increases in presilking DM accumulation, and 17 and 16% increases in postsilking DM accumulation under H in 2012 and 2013, respectively”
e2“Conventional fertilization with most N applied before or during early maize ( Zea mays L.) growth stages can negatively affect production”
Claim · model-written summary
Drip fertigation increased presilking dry matter accumulation by 12 and 10%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Yield increases under drip fertigation were attributed to 18 and 17% increases in postsilking dry matter (DM) accumulation under L, and 12 and 10% increases in presilking DM accumulation, and 17 and 16% increases in postsilking DM accumulation under H in 2012 and 2013, respectively”
e2“Conventional fertilization with most N applied before or during early maize ( Zea mays L.) growth stages can negatively affect production”
Claim · model-written summary
Drip fertigation increased postsilking dry matter accumulation by 17 and 16% under a high N rate.
- Treatment
- drip fertigatione3
- Outcome
- postsilking dry matter (DM) accumulatione3
- Direction
- increasese3
- Value
- 17 and 16%e3
- Qualifier
- under He3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Yield increases under drip fertigation were attributed to 18 and 17% increases in postsilking dry matter (DM) accumulation under L, and 12 and 10% increases in presilking DM accumulation, and 17 and 16% increases in postsilking DM accumulation under H in 2012 and 2013, respectively”
e2“Conventional fertilization with most N applied before or during early maize ( Zea mays L.) growth stages can negatively affect production”
Claim · model-written summary
Greater postsilking N accumulation under drip fertigation, promoted by greater root length and soil mineral N after silking, is associated with improved postsilking DM accumulation under a low N rate.
- Treatment
- drip fertigatione4
- Outcome
- postsilking DM accumulatione4
- Qualifier
- greater root length and soil mineral N after silkinge4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Increased postsilking N accumulation under drip fertigation, promoted by greater root length and soil mineral N after silking, maintained increased leaf area index (LAI) and DM accumulation rate to improve postsilking DM accumulation under L”
e2“Conventional fertilization with most N applied before or during early maize ( Zea mays L.) growth stages can negatively affect production”
Claim · model-written summary
Greater N accumulation under drip fertigation from the 12-leaf stage to silking promoted greater LAI and DM accumulation rate, increasing dry matter accumulation under a high N rate.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Greater N accumulation under drip fertigation from the 12‐leaf stage to silking and after silking promoted greater LAI and DM accumulation rate to increase pre‐ and postsilking DM accumulation under H”
e2“Conventional fertilization with most N applied before or during early maize ( Zea mays L.) growth stages can negatively affect production”
Claim · model-written summary
Drip irrigation improved nitrogen use efficiency and irrigation water use efficiency of maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Because of greater grain yield and N uptake and less water consumption, drip irrigation improved NUE and irrigation water use efficiency”
e2“Conventional fertilization with most N applied before or during early maize ( Zea mays L.) growth stages can negatively affect production”
Claim · model-written summary
Drip irrigation gave greater maize grain yield and N uptake.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Because of greater grain yield and N uptake and less water consumption, drip irrigation improved NUE and irrigation water use efficiency”
e2“Conventional fertilization with most N applied before or during early maize ( Zea mays L.) growth stages can negatively affect production”
Claim · model-written summary
Drip irrigation reduced maize water consumption.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Because of greater grain yield and N uptake and less water consumption, drip irrigation improved NUE and irrigation water use efficiency”
e2“Conventional fertilization with most N applied before or during early maize ( Zea mays L.) growth stages can negatively affect production”
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