Abstract
Purpose: Roses are one of the ornamental species of major importance and economic value. Fertilisation programmes which maximise plant growth and quality, while minimising environmental impact are important. Here, we followed the N and K dynamics during rose development with the aim to define the nutrient demands as a basis for implementing fertigation programmes. Materials and methods: Roses with one basal break were grown in a closed hydroponic system. Destructive samples were taken to determine dry weight, N and K content. In each sample, plants were sectioned into roots, rootstock, basal break, stems and leaves from the zone of active leaves and the zone of cutting flowers, as well as the flower bud in the latter. Results: The shoots of the active leaves and cutting flowers zones exhibited a biphasic growth; dry weight, N and K increased after pruning of the zone of active leaves and the cutting flowers zone, however, in the second phase, total dry weight did not show a significant difference between the phenological phases, while the accumulation of N and K decreased throughout the entire plant. Conclusions: Our results suggest that greenhouse roses develop a dynamic and complex balance between the aerial parts of the plants and the roots for storage and/or transport of photoassimilates, N and K. The total demand for N was 411 and 799 mg per plant for the initial shoot development of the active leaf zone and cutting flowers zone, respectively. The demand for K was 149 and 106 mg per plant for both shoots, respectively. The loss of N (555 mg per plant) and K (167 mg per plant) from roses plants to the root environment implies that lower fertiliser inputs can be used as these nutrients may be re-uptaken by new emerging roots.
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Claims 12
Claim · model-written summary
Shoots in active-leaf and cutting-flower zones exhibited biphasic growth.
Verbatim
e0“The shoots of the active leaves and cutting flowers zones exhibited a biphasic growth”
e1“Roses with one basal break were grown in a closed hydroponic system.”
Claim · model-written summary
Dry weight, N and K increased after pruning.
- Taxon
- Rosese1
- Treatment
- pruninge0
- Outcome
- dry weight, N and Ke0
- Direction
- increasede0
- Setting
- closed hydroponic systeme1
Not reportedComparator
Verbatim
e0“dry weight, N and K increased after pruning of the zone of active leaves and the cutting flowers zone”
e1“Roses with one basal break were grown in a closed hydroponic system.”
Claim · model-written summary
In the second phase total dry weight did not differ significantly between phenological phases.
Verbatim
e0“in the second phase, total dry weight did not show a significant difference between the phenological phases”
t0“rose”
Claim · model-written summary
N and K accumulation decreased throughout the plant in the second phase.
Verbatim
e0“in the second phase, total dry weight did not show a significant difference between the phenological phases, while the accumulation of N and K decreased throughout the entire plant.”
t0“rose”
Claim · model-written summary
Greenhouse roses develop a dynamic balance between aerial parts and roots for storage or transport of photoassimilates, N and K.
Verbatim
e0“Our results suggest that greenhouse roses develop a dynamic and complex balance between the aerial parts of the plants and the roots for storage and/or transport of photoassimilates, N and K.”
Claim · model-written summary
Initial active-leaf shoot development demanded 411 mg N per plant.
Verbatim
e0“The total demand for N was 411 and 799 mg per plant for the initial shoot development of the active leaf zone and cutting flowers zone, respectively.”
t0“rose”
Claim · model-written summary
Initial cutting-flower shoot development demanded 799 mg N per plant.
Verbatim
e0“The total demand for N was 411 and 799 mg per plant for the initial shoot development of the active leaf zone and cutting flowers zone, respectively.”
t0“rose”
Claim · model-written summary
K demand was 149 mg per plant for the active-leaf shoot.
Verbatim
e0“The demand for K was 149 and 106 mg per plant for both shoots, respectively.”
t0“rose”
Claim · model-written summary
K demand was 106 mg per plant for the cutting-flower shoot.
Verbatim
e0“The demand for K was 149 and 106 mg per plant for both shoots, respectively.”
t0“rose”
Claim · model-written summary
Roses lost 555 mg N per plant to the root environment.
Verbatim
e0“The loss of N (555 mg per plant) and K (167 mg per plant) from roses plants to the root environment”
Claim · model-written summary
Roses lost 167 mg K per plant to the root environment.
Verbatim
e0“The loss of N (555 mg per plant) and K (167 mg per plant) from roses plants to the root environment”
Claim · model-written summary
Lower fertilizer inputs may be used because emerging roots may reabsorb lost nutrients.
Verbatim
e0“from roses plants to the root environment implies that lower fertiliser inputs can be used as these nutrients may be re-uptaken by new emerging roots.”
The same questions in other papers
pruning · growth · RosaPositive and negative results
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See all 11 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.