Abstract
ABSTRACT The results from humic substances (HS) application in varied crops and conditions are controversial, and the experiments with the potato crop in Brazil are scarce. The objective of this study was to evaluate the effects of HS doses on the growth and yield of two potato cultivars. Four doses of HS were tested: 0, 5.05, 10.10, and 15.15 L ha-1, applied in the planting furrows of cvs. Agata and BRS F63 Camila, in Guarapuava-PR, in the 2015 and 2016 crop seasons, between October and February. The experiment was carried out using a randomized complete block design, in a factorial scheme (crop season x dose x cultivar), with four replications. Plant samplings were performed at tuber initiation, flowering, tuber bulking, and plant maturation growth stages. After shoot senescence, the total and commercial tuber yields were evaluated. Cultivars responded similarly to HS application, with no significant interaction between HS and cultivars, for most assessed variables. At tuber initiation, there was a negative linear effect of HS doses on leaf area index, number of formed tubers, and tuber and total plant dry weight. In the other evaluations, the effect of HS application was not observed regarding the assessed variables. Likewise, no effects were detected on the number and fresh weight of tubers in total and commercial yields. We concluded that HS application affected both cultivars similarly, hampering initial plant growth and not increasing potato yield.
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Claims 7
Claim · model-written summary
The two potato cultivars responded similarly to humic substances for most variables.
- Taxon
- potato
Solanum tuberosumt0 - Outcome
- no significant interaction between HS and cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivars responded similarly to HS application, with no significant interaction between HS and cultivars, for most assessed variables.”
t0“potato”
Claim · model-written summary
Higher humic substance doses reduced leaf area index at tuber initiation.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tuber initiatione0
- Treatment
- HS dosese0
- Outcome
- leaf area indexe0
- Direction
- negativee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At tuber initiation, there was a negative linear effect of HS doses on leaf area index, number of formed tubers, and tuber and total plant dry weight.”
t0“potato”
Claim · model-written summary
Higher humic substance doses reduced formed tuber number at tuber initiation.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tuber initiatione0
- Treatment
- HS dosese0
- Outcome
- number of formed tuberse0
- Direction
- negativee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At tuber initiation, there was a negative linear effect of HS doses on leaf area index, number of formed tubers, and tuber and total plant dry weight.”
t0“potato”
Claim · model-written summary
Higher humic substance doses reduced tuber dry weight at tuber initiation.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tuber initiatione0
- Treatment
- HS dosese0
- Outcome
- tuber and total plant dry weighte0
- Direction
- negativee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At tuber initiation, there was a negative linear effect of HS doses on leaf area index, number of formed tubers, and tuber and total plant dry weight.”
t0“potato”
Claim · model-written summary
Higher humic substance doses reduced total plant dry weight at tuber initiation.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tuber initiatione0
- Treatment
- HS dosese0
- Outcome
- total plant dry weighte0
- Direction
- negativee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At tuber initiation, there was a negative linear effect of HS doses on leaf area index, number of formed tubers, and tuber and total plant dry weight.”
t0“potato”
Claim · model-written summary
Humic substances had no observed effect on assessed variables at other evaluations.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- HS applicatione0
- Outcome
- assessed variablese0
- Direction
- not observede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the other evaluations, the effect of HS application was not observed regarding the assessed variables.”
t0“potato”
Claim · model-written summary
Humic substances did not affect total or commercial tuber number and fresh weight.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- HS applicatione0
- Outcome
- number and fresh weight of tubers in total and commercial yieldse0
- Direction
- no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HS application was not observed regarding the assessed variables. Likewise, no effects were detected on the number and fresh weight of tubers in total and commercial yields.”
t0“potato”
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See all 34 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.