Abstract
The objective of this work was to verify the responses in agronomic and physiological characters of lettuce seedlings when submitted to different doses of humic acids and the presence or absence of inoculation of the bacterium Azospirillum brasilense. The experiment was carried out at the Protected Cultivation Station and Biological Control Teacher Mário César Lopes, belonging to the Experimental Stations Nucleus of the State University of the West of Paraná. The experimental design was a randomized block design, in a 5 × 2 factorial scheme, with four repetitions, totaling 40 plots. The first factor consisted of five solutions containing humic acid (100%, 75%, 50%, 25% and 0%) and the second factor was the presence or absence of the diazotrophic bacterium Azospirillum brasilense obtained by commercial product. Germination tests were carried out in addition to the determination of agronomic characters such as the number of fully expanded leaves, plant height, stem diameter, main root length, shoot dry mass, root dry mass, total dry mass, and Dickson quality index. The association of diazotrophic bacteria and humic acids did not influence the emergency rate, mean emergence time, mean speed of emergency, emergence speed index, plant height, and root length of lettuce seedlings. The dilutions of humic acids, regardless of inoculation with bacteria diazotrophic favored the development of the number of leaves, stem diameter and Dickson quality index. Inoculation of lettuce seeds with diazotrophic bacteria associated with the addition of humic acids, favored the development of the dry mass of root and total dry matter.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 4
Claim · model-written summary
Combined diazotrophic bacteria and humic acids did not influence lettuce emergence metrics.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- association of diazotrophic bacteria and humic acidse0
- Interactor
- Azospirillum brasilense
Azospirillum brasilensee1symbiont - Outcome
- emergency rate, mean emergence time, mean speed of emergencye0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The association of diazotrophic bacteria and humic acids did not influence the emergency rate, mean emergence time, mean speed of emergency, emergence speed index, plant height, and root length of lettuce seedlings”
e1“the bacterium Azospirillum brasilense”
Claim · model-written summary
Combined diazotrophic bacteria and humic acids did not influence emergence speed index, height, or root length.
- Taxon
- lettuceLactuca sativae0
- Treatment
- association of diazotrophic bacteria and humic acidse0
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee1symbiont
- Outcome
- emergence speed index, plant height, and root lengthe0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The association of diazotrophic bacteria and humic acids did not influence the emergency rate, mean emergence time, mean speed of emergency, emergence speed index, plant height, and root length of lettuce seedlings”
e1“the bacterium Azospirillum brasilense”
Claim · model-written summary
Humic acid dilutions favored leaf number, stem diameter, and seedling quality index regardless of inoculation.
- Taxon
- LettuceLactuca sativat0
- Treatment
- dilutions of humic acidse0
- Outcome
- number of leaves, stem diameter and Dickson quality indexe0
- Direction
- favorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dilutions of humic acids, regardless of inoculation with bacteria diazotrophic favored the development of the number of leaves, stem diameter and Dickson quality index”
t0“Lettuce Seedlings”
Claim · model-written summary
Seed inoculation with diazotrophic bacteria plus humic acids favored root and total dry mass.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Inoculation of lettuce seeds with diazotrophic bacteria associated with the addition of humic acidse0
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee1symbiont
- Outcome
- dry mass of root and total dry mattere0
- Direction
- favorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of lettuce seeds with diazotrophic bacteria associated with the addition of humic acids, favored the development of the dry mass of root and total dry matter”
e1“the bacterium Azospirillum brasilense”
The same questions in other papers
inoculation · Azospirillum brasilense · Lactuca sativa (garden lettuce)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
other · quality: general · Lactuca sativa (garden lettuce)Results agree
8 papers in the same direction as this paper
- positive
- positive
- positive
5 papers more in this group
See all 9 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.