Abstract
In search for alternative substrates for containerized ornamentals, potted Dgndranthema grandiflora (chrysanthemum) plants were grown in Maule Region for summer flowering, using pure fresh sawdust and sawdust plus pine bark (both from Pinus radiata) in mixes as growing media, with soluble fertilizer in fertigation. Rooted cuttings of cv. 'Marina' (Belgian type) were planted individually in 17 cm (diameter) x 14 cm (height) pots filled with different media. For 75 days, plants were kept in an unheated greenhouse under artificial long days and were fertilized weekly with a soluble fertilizer. After pinching, plants were taken outside the greenhouse to full sun conditions, and artificial short days were applied for 8 weeks. In a split plot design, 8 treatments were carried out: 4 media mixes (pure sawdust and sawdust: bark in ratios 1:1, 2:1 or 3:1 by volume), and 2 frequencies of watering with soluble fertilizer; daily and every 2 days (applying a solution of 200 ppm N, based on a soluble NPK fertilizer, with 3 replica per treatment. Plants showed a reduced growth in pure sawdust (25.5 cm height) as compared with sawdust: bark (30 to 35 cm). Media mixes and fertilization frequency affected diameter; plants in pure sawdust had a smaller diameter (34 cm) than plants cultivated in sawdust: bark (40 cm). Plants fertilized every 2 days had a smaller diameter (36 cm) than those fertilized daily (41 cm). Plants grown in pure sawdust had yellowish-green leaves, while the leaves of plants grown in sawdust plus bark showed colors close to dark green. Flowers showed different color as when grown in autumn (yellow vs. orange). Plants of all treatments bloomed on the same date. The pH of all media mixes in all measurements during cultivation time was close to 6.0. It is concluded that it is possible to grow potted chrysanthemum in all the tested media mixes, but in the case of pure sawdust, to avoid problems due to its low retention of irrigation solution, it is advisable to mix it with pine bark in a 3:1 ratio.
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Claims 9
Claim · model-written summary
Pure sawdust reduced chrysanthemum height (25.5 cm) compared with sawdust-bark mixes (30 to 35 cm).
- Taxon
- Chrysanthemums
.jpeg?width=60)
Chrysanthemumt0 - Treatment
- pure sawduste1
- Outcome
- heighte1
- Direction
- reducede1
- Value
- 25.5 cme1
- Comparator
- sawdust: barke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
t0“Belgian Chrysanthemums”
e1“Plants showed a reduced growth in pure sawdust (25.5 cm height) as compared with sawdust: bark (30 to 35 cm)”
Claim · model-written summary
Pure sawdust gave a smaller plant diameter (34 cm) than sawdust-bark mixes (40 cm).
- Taxon
- ChrysanthemumsChrysanthemumt0
- Treatment
- pure sawduste2
- Outcome
- diametere2
- Direction
- smallere2
- Value
- 34 cme2
- Comparator
- sawdust: barke2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Belgian Chrysanthemums”
e2“plants in pure sawdust had a smaller diameter (34 cm) than plants cultivated in sawdust: bark (40 cm)”
Claim · model-written summary
Watering every 2 days gave a smaller plant diameter (36 cm) than daily watering (41 cm).
- Taxon
- ChrysanthemumsChrysanthemumt0
- Treatment
- fertilized every 2 dayse3
- Outcome
- diametere3
- Direction
- smallere3
- Value
- 36 cme3
- Comparator
- fertilized dailye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Belgian Chrysanthemums”
e3“Plants fertilized every 2 days had a smaller diameter (36 cm) than those fertilized daily (41 cm)”
Claim · model-written summary
Pure sawdust gave yellowish-green leaves, whereas sawdust-bark mixes gave leaves close to dark green.
- Taxon
- ChrysanthemumsChrysanthemumt0
- Treatment
- pure sawduste4
- Outcome
- yellowish-green leavese4
- Comparator
- sawdust plus barke4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Belgian Chrysanthemums”
e4“Plants grown in pure sawdust had yellowish-green leaves, while the leaves of plants grown in sawdust plus bark showed colors close to dark green”
Claim · model-written summary
Flower colour differed between autumn and summer production (yellow vs. orange).
- Taxon
- ChrysanthemumsChrysanthemumt0
- Outcome
- different colore5
- Value
- yellow vs. orangee5
- Setting
- autumne5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Belgian Chrysanthemums”
e5“Flowers showed different color as when grown in autumn (yellow vs. orange)”
Claim · model-written summary
All treatments bloomed on the same date.
- Taxon
- ChrysanthemumsChrysanthemumt0
- Outcome
- bloomed on the same datee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Belgian Chrysanthemums”
e6“Plants of all treatments bloomed on the same date”
Claim · model-written summary
The pH of all growing media mixes stayed close to 6.0 during cultivation.
Not reportedTaxon
Verbatim
e7“The pH of all media mixes in all measurements during cultivation time was close to 6.0”
Claim · model-written summary
Pure sawdust should be mixed with pine bark in a 3:1 ratio to avoid poor irrigation retention.
- Taxon
- ChrysanthemumsChrysanthemumt0
- Outcome
- mix it with pine bark in a 3:1 ratioe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Belgian Chrysanthemums”
e1“it is advisable to mix it with pine bark in a 3:1 ratio”
Claim · model-written summary
Potted chrysanthemum could be grown in all the tested media mixes.
- Taxon
- ChrysanthemumsChrysanthemumt0
- Outcome
- possible to grow potted chrysanthemum in all the tested media mixese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Belgian Chrysanthemums”
e2“It is concluded that it is possible to grow potted chrysanthemum in all the tested media mixes”
The same questions in other papers
growing medium · growth · ChrysanthemumPositive and negative results
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2 papers in the same direction as this paper · 49 in the opposite direction
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See all 52 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.