Paper · 2017 · The Journal Agriculture and Forestry

EFFECT OF POLYPROPYLENE COVER AND PLANT DENSITY ON YIELD AND ASCORBIC ACID CONTENT OF BELL PEPPER FRUITS

Lovro SINKOVIC; Natasa MIRECKI; Dragan ZNIDARCIC

7
claims
14
verbatim quotes
1
citations
2
research areas
✓
Open access · cc-by

Abstract

This study aims to evaluate the effect of polypropylene cover and plant density on the marketable yield and ascorbic acid content of bell pepper fruits. Seedlings of cultivar 'Bianca F1' were planted in four plant densities of 21.8, 13.2, 10.9 and 6.6 plants m -2 . The two-factorial experiment in four repetitions was used, where the 1 st factor was covering (covered and uncovered) and 2 nd factor was plant density in four steps (above mentioned). The polypropylene cover over the plants was laid on plastic hoops, while control plants remain uncovered. Plants were grown on soil covered with black polyethylene mulch film. Mean daily air temperature under the polypropylene cover was 2.3 -5.8 C higher than the air temperature in the uncovered crop. Polypropylene cover was removed after eight weeks, when the daily air temperature reached 30 C. Yield component analysis indicated that fruits from covered plants had greater fresh weight in comparison to fruits from uncovered plants for all plant densities. The marketable yield under polypropylene cover was significantly higher (over 70 %) compared to uncovered control. Increasing plant density enhanced the marketable yield, but the interactions of cover and plant density were not significant. The cover had strong influence on the yield at the second harvest time. Ascorbic acid contents were found significantly higher for bell pepper fruits grown under cover at all plant densities.

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Claims 7

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Air temperature under polypropylene cover was 2.3 -5.8 C higher than in uncovered crop.

Taxon
BELL PEPPERt0
Treatment
polypropylene covere0
Outcome
daily air temperaturee0
Direction
highere0
Value
2.3 -5.8 Ce0
Comparator
uncovered crope0

Verbatim

t0

“BELL PEPPER FRUITS”

✓ located verbatim in the source · title, characters 86–104 · show in text ↑
e0

“Mean daily air temperature under the polypropylene cover was 2.3 -5.8 C higher than the air temperature in the uncovered crop.”

✓ located verbatim in the source · abstract, characters 627–753 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Covered plants had greater fruit fresh weight than uncovered plants at all densities.

Taxon
BELL PEPPERt0
Treatment
covered plantse0
Outcome
fresh weighte0
Direction
greatere0
Qualifier
all plant densitiese0
Comparator
uncovered plantse0

Verbatim

t0

“BELL PEPPER FRUITS”

✓ located verbatim in the source · title, characters 86–104 · show in text ↑
e0

“fruits from covered plants had greater fresh weight in comparison to fruits from uncovered plants for all plant densities”

✓ located verbatim in the source · abstract, characters 890–1011 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Marketable yield under polypropylene cover was significantly over 70 % higher than uncovered control.

Taxon
BELL PEPPERt0
Treatment
polypropylene covere0
Outcome
marketable yielde0
Direction
highere0
Value
over 70 %e0
Comparator
uncovered controle0

Verbatim

t0

“BELL PEPPER FRUITS”

✓ located verbatim in the source · title, characters 86–104 · show in text ↑
e0

“The marketable yield under polypropylene cover was significantly higher (over 70 %) compared to uncovered control.”

✓ located verbatim in the source · abstract, characters 1013–1127 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Increasing plant density enhanced marketable yield.

Taxon
BELL PEPPERt0
Treatment
Increasing plant densitye0
Outcome
marketable yielde0
Direction
enhancede0

Not reportedComparator

Verbatim

t0

“BELL PEPPER FRUITS”

✓ located verbatim in the source · title, characters 86–104 · show in text ↑
e0

“Increasing plant density enhanced the marketable yield”

✓ located verbatim in the source · abstract, characters 1128–1182 · show in text ↑
Associationobservedoriginal resultnot significant (as stated)measured

Claim · model-written summary

Cover and plant density interaction was not significant for marketable yield.

Taxon
BELL PEPPERt0
Treatment
cover and plant densitye0
Outcome
marketable yielde0

Not reportedDirection

Verbatim

t0

“BELL PEPPER FRUITS”

✓ located verbatim in the source · title, characters 86–104 · show in text ↑
e0

“Increasing plant density enhanced the marketable yield, but the interactions of cover and plant density were not significant.”

✓ located verbatim in the source · abstract, characters 1128–1253 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Cover strongly influenced yield at the second harvest.

Taxon
BELL PEPPERt0
Treatment
covere0
Outcome
yielde0
Qualifier
second harvest timee0

Not reportedComparatorDirection

Verbatim

t0

“BELL PEPPER FRUITS”

✓ located verbatim in the source · title, characters 86–104 · show in text ↑
e0

“The cover had strong influence on the yield at the second harvest time.”

✓ located verbatim in the source · abstract, characters 1254–1325 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Covered bell pepper fruit had significantly higher ascorbic acid contents at all plant densities.

Taxon
bell peppere0
Treatment
covere0
Outcome
Ascorbic acid contentse0
Direction
highere0
Qualifier
all plant densitiese0

Not reportedComparator

Verbatim

t0

“BELL PEPPER FRUITS”

✓ located verbatim in the source · title, characters 86–104 · show in text ↑
e0

“Ascorbic acid contents were found significantly higher for bell pepper fruits grown under cover at all plant densities.”

✓ located verbatim in the source · abstract, characters 1326–1445 · show in text ↑

poly(propylene) · quality: postharvest · Capsicum annuum (sweet pepper)Results agree

3 papers: 3 positive, 0 negative or no effect

2 papers in the same direction as this paper

  1. positive
  2. positive
See all 3 papers →

density · quality: postharvest · Capsicum annuum (sweet pepper)Positive and negative results

6 papers: 5 positive, 1 negative or no effect

4 papers in the same direction as this paper · 1 in the opposite direction

  1. no effect
  2. positive
  3. positive

2 papers more in this group

See all 6 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.