Abstract
Three years of field experiments were carried out to explore the response of potato dry matter production, accumulated intercepted photosynthetic active radiation (Aipar) and radiation use efficiency (RUE) to five N levels providing 0, 60, 100, 140 and 180 kg N ha−1 and three drip irrigation strategies, which were full, deficit and none irrigation. Results showed that, irrespective of years, dry matter production and Aipar were increased by prolonged N fertigation, even though N fertigation was carried out from middle to late growing season. The highest total and tuber dry matter and accumulated radiation interception in all three years were obtained when potatoes were provided with 180 kg N ha−1. RUE on the other hand was not affected by N regime. Thus, increases in total dry matter production with increasing N levels were essentially caused by higher Aipar. The strongest response to N fertilization occurred when most N was applied early in the growing season and the latest N fertilization should be applied no later than 41–50 days after emergence. Deficit irrigation, which received ca.70% of irrigation applied to full irrigation, did not reduce radiation interception and radiation use efficiency.
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Claims 7
Claim · model-written summary
Prolonged N fertigation increased dry matter production of potato irrespective of year.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- prolonged N fertigatione1
- Outcome
- dry matter productione1
- Direction
- increasede1
- Qualifier
- irrespective of yearse1
- Setting
- field experimentse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radiation interception and radiation use efficiency of potato”
e1“irrespective of years, dry matter production and Aipar were increased by prolonged N fertigation”
e2“Three years of field experiments were carried out”
Claim · model-written summary
Potato receiving 180 kg N ha−1 had the highest total and tuber dry matter and accumulated radiation interception.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 180 kg N ha−1e3
- Outcome
- total and tuber dry matter and accumulated radiation interceptione3
- Direction
- higheste3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radiation interception and radiation use efficiency of potato”
e3“The highest total and tuber dry matter and accumulated radiation interception in all three years were obtained when potatoes were provided with 180 kg N ha−1”
Claim · model-written summary
Radiation use efficiency of potato was not affected by N regime.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- N regimee4
- Outcome
- RUEe4
- Direction
- not affectede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radiation interception and radiation use efficiency of potato”
e4“RUE on the other hand was not affected by N regime”
Claim · model-written summary
Increase in total dry matter production with N level is attributed to higher accumulated radiation interception (Aipar).
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- total dry matter productione5
- Qualifier
- higher Aipare5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radiation interception and radiation use efficiency of potato”
e5“Thus, increases in total dry matter production with increasing N levels were essentially caused by higher Aipar”
Claim · model-written summary
The strongest potato response to N fertilization occurred when most N was applied early in the growing season.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- most N was applied early in the growing seasone6
- Outcome
- response to N fertilizatione6
- Direction
- strongeste6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radiation interception and radiation use efficiency of potato”
e6“The strongest response to N fertilization occurred when most N was applied early in the growing season”
Claim · model-written summary
Latest N fertilization for potato should be applied no later than 41–50 days after emergence.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- no later than 41–50 days after emergencee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radiation interception and radiation use efficiency of potato”
e7“the latest N fertilization should be applied no later than 41–50 days after emergence”
Claim · model-written summary
Deficit irrigation at about 70% of full irrigation did not reduce potato radiation interception or radiation use efficiency.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Deficit irrigatione1
- Outcome
- radiation interception and radiation use efficiencye1
- Direction
- did not reducee1
- Value
- ca.70%e1
- Comparator
- full irrigatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radiation interception and radiation use efficiency of potato”
e1“Deficit irrigation, which received ca.70% of irrigation applied to full irrigation, did not reduce radiation interception and radiation use efficiency”
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