Abstract
Two experiments were conducted on a commercial farm of late ‘Fortune’ mandarin trees in order to know the response of regulated deficit irrigation (RDI), mainly applied during the most harmful ripening stages, on plant water relations, yield and fruit quality at harvest and after cold storage at different temperatures. Control trees were irrigated to satisfy maximum crop evapotranspiration, while RDI-1 and RDI- 2 represented a 20% and 40% reduction, respectively, in the water applied. Total yield and fruit quality at harvest were not significantly affected by either treatment. Late stage II of fruit growth was the most sensitive period to water stress, while deficit irrigation applied during flowering and stage I of fruit growth resulted in a significantly higher number of fruits per tree and an improvement in irrigation water productivity compared with the Control treatment. In both experiments, skin chroma decreased during cold storage, at the same time as titratable acidity fell. Fruit quality (titratable acidity, skin C* and ascorbic and glutamic acids) were more affected by cold storage than by differences between the RDI treatments. The use of trunk diameter fluctuation was useful for restoring the RDI irrigation to levels of the Control at the end of early stage II. From a quality point of view, any difference between treatments found at harvest tended to diminish during the subsequent shelf-life after cold storage. Quality traits (titratable acidity, ascorbic and glutamic acid) could be used as chilling biomarkers.
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Claims 10
Claim · model-written summary
Total yield and fruit quality at harvest were not significantly affected by RDI-1 or RDI-2.
Verbatim
e1“Total yield and fruit quality at harvest were not significantly affected by either treatment”
e0“Control trees were irrigated to satisfy maximum crop evapotranspiration, while RDI-1 and RDI- 2 represented a 20% and 40% reduction, respectively, in the water applied”
t0“commercial mandarin trees”
Claim · model-written summary
Late stage II of fruit growth was the most sensitive period of mandarin trees to water stress.
Verbatim
e2“Late stage II of fruit growth was the most sensitive period to water stress”
t0“commercial mandarin trees”
Claim · model-written summary
Deficit irrigation during flowering and stage I of fruit growth gave a significantly higher number of fruits per tree than the Control.
Verbatim
e3“deficit irrigation applied during flowering and stage I of fruit growth resulted in a significantly higher number of fruits per tree and an improvement in irrigation water productivity compared with the Control treatment”
t0“commercial mandarin trees”
Claim · model-written summary
Deficit irrigation during flowering and stage I of fruit growth improved irrigation water productivity compared with the Control.
Verbatim
e3“deficit irrigation applied during flowering and stage I of fruit growth resulted in a significantly higher number of fruits per tree and an improvement in irrigation water productivity compared with the Control treatment”
t0“commercial mandarin trees”
Claim · model-written summary
Skin chroma of mandarin fruit decreased during cold storage.
Not reportedComparator
Verbatim
e4“In both experiments, skin chroma decreased during cold storage, at the same time as titratable acidity fell”
t0“commercial mandarin trees”
Claim · model-written summary
Titratable acidity of mandarin fruit fell during cold storage.
Not reportedComparator
Verbatim
e4“In both experiments, skin chroma decreased during cold storage, at the same time as titratable acidity fell”
t0“commercial mandarin trees”
Claim · model-written summary
Fruit quality was more affected by cold storage than by differences between the RDI treatments.
- Taxon
- mandarin treest0
- Treatment
- cold storagee5
- Outcome
- Fruit qualitye5
- Comparator
- differences between the RDI treatmentse5
Not reportedDirection
Verbatim
e5“Fruit quality (titratable acidity, skin C* and ascorbic and glutamic acids) were more affected by cold storage than by differences between the RDI treatments”
t0“commercial mandarin trees”
Claim · model-written summary
Differences between treatments found at harvest tended to diminish during shelf-life after cold storage.
Verbatim
e6“any difference between treatments found at harvest tended to diminish during the subsequent shelf-life after cold storage”
t0“commercial mandarin trees”
Claim · model-written summary
Trunk diameter fluctuation was useful for restoring RDI irrigation to levels of the Control at the end of early stage II.
Verbatim
e7“The use of trunk diameter fluctuation was useful for restoring the RDI irrigation to levels of the Control at the end of early stage II”
t0“commercial mandarin trees”
Claim · model-written summary
Quality traits (titratable acidity, ascorbic and glutamic acid) could be used as chilling biomarkers in mandarin.
Verbatim
e7“Quality traits (titratable acidity, ascorbic and glutamic acid) could be used as chilling biomarkers”
t0“commercial mandarin trees”
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