Abstract
SummaryThe effects of scheduling irrigations at four soil matric potentials under three levels of N fertilization on plant water relations, biomass accumulation and distribution and nutrient concentration in crops of banana (cv. Robusta) were investigated from 1984 to 1986. Plants receiving the most frequent irrigation, when the soil matric potential at 15 cm depth reached −25 kPa maintained significantly higher leaf water potential and osmotic potential, accumulated more biomass and nutrients, and produced higher yield than those which were irrigated at −65 and −85 kPa. However, the differences between irrigations scheduled at −25 and −45 kPa were not significant. Decreasing frequency of irrigation decreased évapotranspiration (ET) but increased N concentration in the dry matter and the water use efficiency (WUE). Effects of irrigation frequency on P, K, Ca and Mg concentrations in the dry matter were fairly small and varied with plant part and time of sampling, and there seemed to be no evidence that infrequent irrigation reduced yields via a restriction in supply of these nutrients. Increasing N application had no significant effect on plant water relations but resulted in increased biomass accumulation, yield, ET and WUE although the difference between application rates of 200 and 300 g N per plant was not conspicuous. N concentration in the dry matter generally increased with increasing level of N application. Differences in concentration of P, K, Ca and Mg were fairly small and varied with plant part and time of sampling.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
Irrigation at −25 kPa gave significantly higher leaf water and osmotic potentials than irrigation at −65 and −85 kPa.
Verbatim
e0“Plants receiving the most frequent irrigation, when the soil matric potential at 15 cm depth reached −25 kPa maintained significantly higher leaf water potential and osmotic potential, accumulated more biomass and nutrients, and produced higher yield than those which were irrigated at −65 and −85 kPa.”
t0“banana”
e1“−25 kPa maintained significantly higher leaf water potential”
Claim · model-written summary
Irrigation at −25 kPa increased biomass and nutrient accumulation compared with −65 and −85 kPa.
Verbatim
e0“Plants receiving the most frequent irrigation, when the soil matric potential at 15 cm depth reached −25 kPa maintained significantly higher leaf water potential and osmotic potential, accumulated more biomass and nutrients, and produced higher yield than those which were irrigated at −65 and −85 kPa.”
t0“banana”
e1“−25 kPa maintained significantly higher leaf water potential”
Claim · model-written summary
Irrigation at −25 kPa produced higher banana yield than irrigation at −65 and −85 kPa.
Verbatim
e0“produced higher yield than those which were irrigated at −65 and −85 kPa”
t0“banana”
e1“−25 kPa maintained significantly higher leaf water potential”
Claim · model-written summary
Differences between irrigation at −25 and −45 kPa were not significant.
Not reportedDirection
Verbatim
e0“differences between irrigations scheduled at −25 and −45 kPa were not significant”
t0“banana”
Claim · model-written summary
Less frequent irrigation reduced evapotranspiration.
- Taxon
- bananat0
- Treatment
- Decreasing frequency of irrigatione0
- Outcome
- évapotranspiratione0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Decreasing frequency of irrigation decreased évapotranspiration (ET) but increased N concentration in the dry matter and the water use efficiency (WUE).”
t0“banana”
Claim · model-written summary
Less frequent irrigation raised dry matter nitrogen concentration and water use efficiency.
- Taxon
- bananat0
- Treatment
- Decreasing frequency of irrigatione0
- Outcome
- N concentration in the dry matter and the water use efficiencye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Decreasing frequency of irrigation decreased évapotranspiration (ET) but increased N concentration in the dry matter and the water use efficiency (WUE).”
t0“banana”
Claim · model-written summary
Irrigation frequency had small, variable effects on dry matter P, K, Ca and Mg concentrations.
- Taxon
- bananat0
- Treatment
- irrigation frequencye0
- Outcome
- P, K, Ca and Mg concentrations in the dry mattere0
- Qualifier
- varied with plant part and time of samplinge0
Not reportedComparatorDirection
Verbatim
e0“Effects of irrigation frequency on P, K, Ca and Mg concentrations in the dry matter were fairly small and varied with plant part and time of sampling”
t0“banana”
Claim · model-written summary
Infrequent irrigation did not appear to restrict banana yields through reduced P, K, Ca or Mg supply.
Verbatim
e0“there seemed to be no evidence that infrequent irrigation reduced yields via a restriction in supply of these nutrients”
t0“banana”
Claim · model-written summary
Increased nitrogen application had no significant effect on banana water relations.
- Taxon
- bananat0
- Treatment
- Increasing N applicatione0
- Outcome
- plant water relationse0
- Direction
- no significant effecte0
Not reportedComparator
Verbatim
e0“Increasing N application had no significant effect on plant water relations”
t0“banana”
Claim · model-written summary
Increased nitrogen application raised biomass, yield, evapotranspiration and water use efficiency.
- Taxon
- bananat0
- Treatment
- Increasing N applicatione0
- Outcome
- biomass accumulation, yield, ET and WUEe0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Increasing N application had no significant effect on plant water relations but resulted in increased biomass accumulation, yield, ET and WUE”
t0“banana”
Claim · model-written summary
The difference between nitrogen application at 200 and 300 g per plant was not conspicuous.
- Taxon
- bananat0
- Treatment
- application rates of 200 and 300 g N per plante0
- Outcome
- differencee0
- Comparator
- 300 g N per plante0
Not reportedDirection
Verbatim
e0“difference between application rates of 200 and 300 g N per plant was not conspicuous”
t0“banana”
Claim · model-written summary
Dry matter nitrogen concentration generally increased with nitrogen application level.
- Taxon
- bananat0
- Treatment
- increasing level of N applicatione0
- Outcome
- N concentration in the dry mattere0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“N concentration in the dry matter generally increased with increasing level of N application”
t0“banana”
Claim · model-written summary
P, K, Ca and Mg concentration differences across nitrogen levels were small and varied by plant part and sampling time.
- Taxon
- bananat0
- Treatment
- N applicatione1
- Outcome
- concentration of P, K, Ca and Mge0
- Qualifier
- varied with plant part and time of samplinge0
Not reportedComparatorDirection
Verbatim
e0“Differences in concentration of P, K, Ca and Mg were fairly small and varied with plant part and time of sampling”
t0“banana”
e1“Increasing N application had no significant effect”
The same questions in other papers
irrigation · physiology: water · MusaPositive and negative results
21 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
19 papers more in this group
See all 23 papers →nitrogen · growth · MusaPositive and negative results
20 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
19 papers more in this group
See all 23 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.