Paper · 2021 · Journal of Plant Nutrition

Effects of humic acid and cytokinin on yield, biochemical attributes and nutrient elements of radish ( Raphanus sativus L.) cv. Watermelon

Taher Barzegar; Saeedeh Mahmoodi; Fatemeh Nekounam; et al.

10
claims
20
verbatim quotes
7
citations
2
research areas
—
Not open access

Abstract

In this study, the effects of four concentrations of humic acid (0, 0.5, 1, and 1.5 kg ha−1, HA applied to the soil) and kinetin (0, 25, 50, and 75 mg L−1, KT, foliar sprayed) on vegetative growth, yield and biochemical attributes of radish cv. Watermelon, grown in two seasons of spring and autumn, were investigated. Results showed that, the number of leaves per plant, leaf area and chlorophyll content increased with application of HA and KT in both seasons, while the high levels of treatments had no significant effect on leaf number per plant and chlorophyll content in spring season. The root diameter, fresh weight and yield increased significantly with application of HA and KT in both seasons, though, this increase was noticeable in the autumn season. Our results also showed that radish root treated by HA and KT exhibited higher root firmness, vitamin C, anthocyanin content and total soluble solids (TSS), especially in autumn cultivation. Macronutrient contents of root including magnesium (Mg), phosphorus (P), potassium (K), nitrogen (N), and calcium (Ca) were significantly enhanced by HA and KT, however high concentration of KT in combination with high concentration of HA decreased some nutrient contents. Generally, the results of this study demonstrated that cultivation season is one of the most important management tools to minimize the negative effects of high temperature during root development. In addition, the benefits of KT spray combined with HA were inconsistent between both seasons, but showed more in the autumn crops.

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Claims 10

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Humic acid and kinetin increased radish leaf number, leaf area and chlorophyll in both seasons.

Treatment
HA and KTe0
Outcome
number of leaves per plant, leaf area and chlorophyll contente0
Direction
increasede0
Qualifier
both seasonse0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e0

“the number of leaves per plant, leaf area and chlorophyll content increased with application of HA and KT in both seasons”

✓ located verbatim in the source · abstract, characters 340–461 · show in text ↑
t1

“radish ( Raphanus sativus L.)”

✓ located verbatim in the source · title, characters 94–123 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

High treatment levels did not significantly affect spring leaf number and chlorophyll content.

Treatment
high levels of treatmentse0
Outcome
leaf number per plant and chlorophyll contente0
Direction
no significant effecte0
Qualifier
spring seasone0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e0

“the high levels of treatments had no significant effect on leaf number per plant and chlorophyll content in spring season”

✓ located verbatim in the source · abstract, characters 469–590 · show in text ↑
t1

“radish ( Raphanus sativus L.)”

✓ located verbatim in the source · title, characters 94–123 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Humic acid and kinetin significantly increased radish root diameter, fresh weight and yield in both seasons.

Treatment
HA and KTe0
Outcome
root diameter, fresh weight and yielde0
Direction
increasede0
Qualifier
both seasonse0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e0

“The root diameter, fresh weight and yield increased significantly with application of HA and KT in both seasons”

✓ located verbatim in the source · abstract, characters 592–703 · show in text ↑
t1

“radish ( Raphanus sativus L.)”

✓ located verbatim in the source · title, characters 94–123 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The increase in root size and yield was more noticeable in autumn.

Outcome
increasee0
Setting
autumn seasone0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e0

“this increase was noticeable in the autumn season”

✓ located verbatim in the source · abstract, characters 713–762 · show in text ↑
t1

“radish ( Raphanus sativus L.)”

✓ located verbatim in the source · title, characters 94–123 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Humic acid and kinetin increased radish root firmness, vitamin C and anthocyanin content.

Treatment
HA and KTe0
Outcome
root firmness, vitamin C, anthocyanin contente0
Direction
highere0
Qualifier
especially in autumn cultivatione0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e0

“radish root treated by HA and KT exhibited higher root firmness, vitamin C, anthocyanin content and total soluble solids (TSS), especially in autumn cultivation”

✓ located verbatim in the source · abstract, characters 793–953 · show in text ↑
t1

“radish ( Raphanus sativus L.)”

✓ located verbatim in the source · title, characters 94–123 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Humic acid and kinetin increased radish root total soluble solids, especially in autumn.

Treatment
HA and KTe0
Outcome
total soluble solids (TSS)e0
Direction
highere0
Qualifier
especially in autumn cultivatione0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e0

“radish root treated by HA and KT exhibited higher root firmness, vitamin C, anthocyanin content and total soluble solids (TSS), especially in autumn cultivation”

✓ located verbatim in the source · abstract, characters 793–953 · show in text ↑
t1

“radish ( Raphanus sativus L.)”

✓ located verbatim in the source · title, characters 94–123 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Humic acid and kinetin significantly enhanced radish root magnesium, phosphorus and potassium.

Treatment
HA and KTe0
Outcome
magnesium (Mg), phosphorus (P), potassium (K)e0
Direction
enhancede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Macronutrient contents of root including magnesium (Mg), phosphorus (P), potassium (K), nitrogen (N), and calcium (Ca) were significantly enhanced by HA and KT”

✓ located verbatim in the source · abstract, characters 955–1114 · show in text ↑
t1

“radish ( Raphanus sativus L.)”

✓ located verbatim in the source · title, characters 94–123 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Humic acid and kinetin significantly enhanced radish root nitrogen and calcium.

Treatment
HA and KTe0
Outcome
nitrogen (N), and calcium (Ca)e0
Direction
enhancede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Macronutrient contents of root including magnesium (Mg), phosphorus (P), potassium (K), nitrogen (N), and calcium (Ca) were significantly enhanced by HA and KT”

✓ located verbatim in the source · abstract, characters 955–1114 · show in text ↑
t1

“radish ( Raphanus sativus L.)”

✓ located verbatim in the source · title, characters 94–123 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Combining high kinetin and high humic acid reduced some root nutrient contents.

Treatment
high concentration of KT in combination with high concentration of HAe0
Outcome
some nutrient contentse0
Direction
decreasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e0

“high concentration of KT in combination with high concentration of HA decreased some nutrient contents”

✓ located verbatim in the source · abstract, characters 1124–1226 · show in text ↑
t1

“radish ( Raphanus sativus L.)”

✓ located verbatim in the source · title, characters 94–123 · show in text ↑
Intervention effectauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

The combined treatment benefits varied between seasons and were greater in autumn crops.

Treatment
KT spray combined with HAe0
Outcome
benefitse0
Direction
showed moree0
Qualifier
autumn cropse0
Comparator
both seasonse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e0

“the benefits of KT spray combined with HA were inconsistent between both seasons, but showed more in the autumn crops”

✓ located verbatim in the source · abstract, characters 1439–1556 · show in text ↑
t1

“radish ( Raphanus sativus L.)”

✓ located verbatim in the source · title, characters 94–123 · show in text ↑

kinetin · nutrient: content · Raphanus sativus (radish)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

kinetin · quality: sugar starch · Raphanus sativus (radish)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

kinetin · yield · Raphanus sativus (radish)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 →

kinetin · physiology: pigments · Raphanus sativus (radish)Results agree

4 papers: 4 positive, 0 negative or no effect

3 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive
See all 4 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.