Abstract
Humic acids are plant biostimulants, which can be used in horticulture as an effective and relatively inexpensive alternative to chemical means of production. The aim of the study was to assess how the fertiliser containing humic acids affected the growth, yield, and quality of strawberry fruits. In 2021, an experiment was conducted on two-year-old strawberry bushes (Fragaria× ananassa (Duchesne ex Weston) Duchesne ex Rozier) of the ‘Rumba’ cultivar growing on a horticultural farm in northern Wielkopolska, Poland. During the growing season, the soil was fertilized by the mineral fertilization and the bushes were sprayed two, three, or four times with the Humi Brown Gold fertiliser containing humic acids. In the experiment, the soil enzymatic activity, biometric parameters of strawberry leaves, fruit yield and fruit quality was assessed. It was determined that, in the experimental treatments where foliar fertilisation had been applied, the activities of proteases and dehydrogenases as well as soil respiration increased by more than double and were significantly higher than in the variants where soil fertilisers had been applied. The strawberry bushes treated with the humic acids fertiliser developed more than 60% larger surface leaves, bloomed more intensively and gave a higher yield. Fruits with significantly higher firmness were harvested from such bushes, with higher weight and extract content than those where the soil fertiliser had been applied. The difference was several tens of percent. This leads to the conclusion that the foliar application of humic acids could be an effective alternative to mineral fertilisation in strawberry plantations.
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Claims 9
Claim · model-written summary
Foliar fertilizer more than doubled soil protease and dehydrogenase activities relative to soil fertilizer.
- Taxon
- strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Treatment
- foliar fertilisatione1
- Outcome
- activities of proteases and dehydrogenasese0
- Direction
- increasede0
- Value
- more than doublee0
- Comparator
- soil fertiliserse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“the activities of proteases and dehydrogenases as well as soil respiration increased by more than double and were significantly higher than in the variants where soil fertilisers had been applied.”
t0“strawberry fruits”
e1“foliar fertilisation”
Claim · model-written summary
Foliar fertilizer more than doubled soil respiration relative to soil fertilizer.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- foliar fertilisatione1
- Outcome
- soil respiratione0
- Direction
- increasede0
- Value
- more than doublee0
- Comparator
- soil fertiliserse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of proteases and dehydrogenases as well as soil respiration increased by more than double and were significantly higher than in the variants where soil fertilisers had been applied.”
t0“strawberry fruits”
e1“foliar fertilisation”
Claim · model-written summary
Humic acid fertilizer produced over 60% larger strawberry leaves.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- humic acids fertilisere0
- Outcome
- surface leavese0
- Direction
- largere0
- Value
- more than 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The strawberry bushes treated with the humic acids fertiliser developed more than 60% larger surface leaves, bloomed more intensively and gave a higher yield.”
Claim · model-written summary
Treated strawberry plants bloomed more intensively.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- humic acids fertilisere0
- Outcome
- bloomede0
- Direction
- more intensivelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The strawberry bushes treated with the humic acids fertiliser developed more than 60% larger surface leaves, bloomed more intensively and gave a higher yield.”
Claim · model-written summary
Treated strawberry plants yielded more fruit.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- humic acids fertilisere0
- Outcome
- yielde0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The strawberry bushes treated with the humic acids fertiliser developed more than 60% larger surface leaves, bloomed more intensively and gave a higher yield.”
Claim · model-written summary
Fruit firmness was significantly higher after humic acid treatment than soil fertilizer.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- humic acids fertilisere1
- Outcome
- firmnesse0
- Direction
- highere0
- Comparator
- soil fertilisere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruits with significantly higher firmness were harvested from such bushes, with higher weight and extract content than those where the soil fertiliser had been applied.”
t0“strawberry fruits”
e1“humic acids fertiliser”
Claim · model-written summary
Fruit weight was higher after humic acid treatment than soil fertilizer.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- humic acids fertilisere1
- Outcome
- weighte0
- Direction
- highere0
- Comparator
- soil fertilisere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruits with significantly higher firmness were harvested from such bushes, with higher weight and extract content than those where the soil fertiliser had been applied.”
t0“strawberry fruits”
e1“humic acids fertiliser”
Claim · model-written summary
Fruit extract content was higher after humic acid treatment than soil fertilizer.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- humic acids fertilisere1
- Outcome
- extract contente0
- Direction
- highere0
- Comparator
- soil fertilisere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruits with significantly higher firmness were harvested from such bushes, with higher weight and extract content than those where the soil fertiliser had been applied.”
t0“strawberry fruits”
e1“humic acids fertiliser”
Claim · model-written summary
The authors propose foliar humic acids as an alternative to mineral fertilizer in strawberry plantations.
- Taxon
- strawberryFragaria ×ananassae0
- Outcome
- foliar application of humic acidse0
- Comparator
- mineral fertilisatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar application of humic acids could be an effective alternative to mineral fertilisation in strawberry plantations.”
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See all 141 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.