Abstract
Abstract The drip irrigation method offers the potential of higher application efficiency of water and allows precise placement of fertilizer directly in the root zone. The use of drip irrigation also facilitates the frequent application of fertilizer via injection in the irrigation system, which allows the conjunction between nutrient application and time of crop needs. The effect of nitrogen (N) rate and drip fertigation scheduling were evaluated on yield, N uptake, and recovery of potato grown on sandy soil. The N was applied at two rates under regular irrigation (control) or through drip irrigation along with four fertigation schedules including: equal doses applied at the weekly or biweekly intervals and different doses based on growth curve characters (12.5, 25, 50, and 12.5% of the total N amount) at the same intervals, for initial, developmental, mid, and mature stages, respectively. The N rate and wise fertigation scheduling significantly affected yield and yield components except for the tuber number per plant. The higher tuber yield was associated with a higher N rate when the respective nutrient was stage wise scheduled and typically responded to growth curve character than equal scheduling at any time intervals. The increase in yield was higher with wise weekly by 13 and 22% than with equal weekly or biweekly intervals, respectively. For this scenario, the modeled crop uptake at the weekly interval was 16% higher than equal applied at the same interval or even greater by 31% than equal applied at the biweekly interval. Similarly, the higher N rate and wise weekly scheduling increased N recovery and N use efficiency (NUE). Soil N movement with wise scheduling resulted in lesser leaching of NO 3 − -N to deeper soil layers, particularly with wise weekly scheduling. The framework presented in this study regarding the rate and N scheduling to copy with plant growth curve can sustain high crop yield while reducing NO 3 − -N leaching, increasing N uptake and recover.
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Claims 9
Claim · model-written summary
Nitrogen rate and fertigation schedule significantly affected yield and yield components other than tuber number.
- Taxon
- Potato
Solanum tuberosumt0 - Treatment
- N rate and wise fertigation schedulinge0
- Outcome
- yield and yield componentse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N rate and wise fertigation scheduling significantly affected yield and yield components except for the tuber number per plant.”
t0“Potato Yield Performance”
Claim · model-written summary
Tuber number per plant was the exception to significant scheduling effects.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- N rate and wise fertigation schedulinge0
- Outcome
- tuber number per plante0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N rate and wise fertigation scheduling significantly affected yield and yield components except for the tuber number per plant.”
t0“Potato Yield Performance”
Claim · model-written summary
Higher nitrogen rate with stage-wise scheduling produced higher tuber yield than equal schedules.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- higher N ratee0
- Outcome
- tuber yielde0
- Direction
- highere0
- Comparator
- equal scheduling at any time intervalse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher tuber yield was associated with a higher N rate when the respective nutrient was stage wise scheduled and typically responded to growth curve character than equal scheduling at any time intervals.”
t0“Potato Yield Performance”
Claim · model-written summary
Wise weekly scheduling increased yield by 13% over equal weekly scheduling.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- wise weeklye0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 13e0
- Comparator
- equal weeklye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in yield was higher with wise weekly by 13 and 22% than with equal weekly or biweekly intervals, respectively.”
t0“Potato Yield Performance”
Claim · model-written summary
Wise weekly scheduling increased yield by 22% over equal biweekly scheduling.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- wise weeklye0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 22%e0
- Comparator
- biweekly intervalse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in yield was higher with wise weekly by 13 and 22% than with equal weekly or biweekly intervals, respectively.”
t0“Potato Yield Performance”
Claim · model-written summary
Modeled crop nitrogen uptake with wise weekly scheduling was 16% higher than equal weekly application.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- weekly intervale0
- Outcome
- modeled crop uptakee0
- Direction
- highere0
- Value
- 16%e0
- Comparator
- equal applied at the same intervale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For this scenario, the modeled crop uptake at the weekly interval was 16% higher than equal applied at the same interval or even greater by 31% than equal applied at the biweekly interval.”
t0“Potato Yield Performance”
Claim · model-written summary
Modeled crop nitrogen uptake with wise weekly scheduling was 31% greater than equal biweekly application.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- weekly intervale0
- Outcome
- modeled crop uptakee0
- Direction
- greatere0
- Value
- 31%e0
- Comparator
- equal applied at the biweekly intervale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For this scenario, the modeled crop uptake at the weekly interval was 16% higher than equal applied at the same interval or even greater by 31% than equal applied at the biweekly interval.”
t0“Potato Yield Performance”
Claim · model-written summary
Higher nitrogen rate and wise weekly scheduling increased nitrogen recovery and use efficiency.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- higher N rate and wise weekly schedulinge0
- Outcome
- N recovery and N use efficiency (NUE)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similarly, the higher N rate and wise weekly scheduling increased N recovery and N use efficiency (NUE).”
t0“Potato Yield Performance”
Claim · model-written summary
Wise scheduling reduced nitrate leaching to deeper soil layers, especially weekly scheduling.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- wise schedulinge0
- Outcome
- leaching of NO 3 − -N to deeper soil layerse0
- Direction
- lessere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil N movement with wise scheduling resulted in lesser leaching of NO 3 − -N to deeper soil layers, particularly with wise weekly scheduling.”
t0“Potato Yield Performance”
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