Abstract
The quality seedlings production, which is dependent on the substrate used, are fundamental to the establishment of vegetable crops. The aim of this study was to evaluate the quality of lettuce seedlings in response to addition of vermiculite concentrations of substrates (pine bark, coconut fiber and peat) through the use of multivariate statistical methods. An experiment was conducted, where treatments consisted of vegetable substrates combinations and three concentrations of vermiculite (0, 25 and 50%), were added to the substrates. Lettuce crop was used as test plant, from which we evaluated the seedlings emergence, the root volume (RV), roots and shoot fresh and dry phytomass, true leaves number and the smaller true leaf height. The principal component analysis and canonical discriminant function analysis were applied. The seedling emergence was lower when using coconut fiber as substrate. The other variables evaluated have had maximum increments when using peat. The first two principal components explained 84.70% of the total variance. The RV was the most important for seedlings produced, variable highlighted by the use of the two multivariate methods, which has proved to be suitable for qualitative assessments of seedlings. The quality of lettuce seedlings is not affected by the addition of vermiculite in substrates composed of pine bark, coconut fiber and peat.
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Claims 6
Claim · model-written summary
Coconut fiber reduced lettuce seedling emergence.
- Taxon
- Lettuce
Lactuca sativat0 - Treatment
- coconut fibere0
- Outcome
- seedling emergencee0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seedling emergence was lower when using coconut fiber as substrate.”
t0“Lettuce seedlings”
Claim · model-written summary
Peat produced maximum increments in the other evaluated seedling variables.
- Taxon
- LettuceLactuca sativat0
- Treatment
- peate0
- Outcome
- other variables evaluatede0
- Direction
- maximum incrementse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The other variables evaluated have had maximum increments when using peat.”
t0“Lettuce seedlings”
Claim · model-written summary
The first two principal components explained 84.70% of variance in lettuce seedling assessments.
- Taxon
- LettuceLactuca sativat0
- Outcome
- total variancee0
- Value
- 84.70%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first two principal components explained 84.70% of the total variance.”
t0“Lettuce seedlings”
Claim · model-written summary
Root volume was the most important variable for seedling assessment.
- Taxon
- LettuceLactuca sativat0
- Organ / stage
- roote1
- Outcome
- most important for seedlings producede0
- Direction
- most importante0
- Comparator
- two multivariate methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The RV was the most important for seedlings produced, variable highlighted by the use of the two multivariate methods”
e1“the root volume (RV)”
t0“Lettuce seedlings”
Claim · model-written summary
The two multivariate methods were suitable for qualitative lettuce seedling assessment.
- Taxon
- LettuceLactuca sativat0
- Outcome
- suitable for qualitative assessments of seedlingse0
- Comparator
- two multivariate methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of the two multivariate methods, which has proved to be suitable for qualitative assessments of seedlings”
t0“Lettuce seedlings”
Claim · model-written summary
Adding vermiculite to the tested substrates did not affect lettuce seedling quality.
- Taxon
- lettuceLactuca sativae0
- Treatment
- addition of vermiculitee0
- Outcome
- quality of lettuce seedlingse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The quality of lettuce seedlings is not affected by the addition of vermiculite in substrates composed of pine bark, coconut fiber and peat.”
The same questions in other papers
growing medium · quality: general · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- 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.