Abstract
The efficacy of daily quantitative nutrient management (QNM) in tomato rockwool hydroponics under CO2-enriched conditions was tested. Three levels of nutrient supply based on daily water uptake were compared with conventional electrical conductivity (EC)-based management. A newly developed automatic QNM system with server and client controller prototypes was used to control nutrient supply. Plants in a greenhouse were supplied with 0.5 (S), 1.0 (M) or 1.5 (L) times the optimal daily amount of nutrients for normal CO2 conditions from October 2009 to February 2010. EC-based management produced highest cumulative total fruit yield during 16 weeks of fruit harvest followed by L, M and S treatments, in that order. There was no significant difference in cumulative marketable fruit yields in EC-based management, L and M treatments, but marketable yields from these three treatments were significantly higher than S treatment. Fruit dry matter content and fruit soluble solid content in QNM treatments were almost the same or higher than fruit grown in EC-based management. The amount of nutrient used during the experiment in S, M and L treatments was 10, 24 and 42%, respectively, of the amount used for EC-based management. Nutrient use efficiency (NUE), defined as marketable fruit yield per unit of the amount of nutrient used, in all three QNM treatments was higher than in EC-based management. Thus, daily QNM can reduce nutrient use without lowering fruit yields and quality under CO2-enriched conditions. The M or L treatment provided optimal balance between fruit yield and NUE. The L treatment gave slightly higher marketable yield but lower NUE than M treatment.
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Claims 10
Claim · model-written summary
EC-based management gave the highest cumulative total fruit yield in tomato, ahead of the L, M and S treatments over 16 weeks of harvest.
- Taxon
- tomato
Solanum lycopersicume0 - Organ / stage
- fruite1
- Treatment
- EC-based managemente1
- Outcome
- cumulative total fruit yielde1
- Direction
- higheste1
- Qualifier
- during 16 weeks of fruit harveste1
- Comparator
- L, M and S treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato rockwool hydroponics”
e1“EC-based management produced highest cumulative total fruit yield during 16 weeks of fruit harvest followed by L, M and S treatments, in that order”
Claim · model-written summary
In tomato, cumulative marketable fruit yield did not differ significantly between EC-based management and the L and M treatments.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- L and M treatmentse2
- Outcome
- cumulative marketable fruit yieldse2
- Direction
- no_changeinferrede2
- Qualifier
- no significant differencee2
- Comparator
- EC-based managemente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato rockwool hydroponics”
e2“There was no significant difference in cumulative marketable fruit yields in EC-based management, L and M treatments”
Claim · model-written summary
In tomato, cumulative marketable yields from EC-based management, L and M treatments were significantly higher than from the S treatment.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- these three treatmentse3
- Outcome
- marketable yieldse3
- Direction
- highere3
- Comparator
- S treatmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato rockwool hydroponics”
e3“marketable yields from these three treatments were significantly higher than S treatment”
Claim · model-written summary
In tomato, fruit dry matter and soluble solid contents under QNM treatments were almost the same as or higher than under EC-based management.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- fruite4
- Treatment
- QNM treatmentse4
- Outcome
- Fruit dry matter content and fruit soluble solid contente4
- Direction
- highere4
- Qualifier
- almost the samee4
- Comparator
- EC-based managemente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato rockwool hydroponics”
e4“Fruit dry matter content and fruit soluble solid content in QNM treatments were almost the same or higher than fruit grown in EC-based management”
Claim · model-written summary
The nutrient amount used in the S, M and L treatments was 10, 24 and 42% of the amount used for EC-based management in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- S, M and L treatmentse5
- Outcome
- amount of nutrient usede5
- Direction
- lowerinferrede5
- Value
- 10, 24 and 42%e5
- Comparator
- EC-based managemente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato rockwool hydroponics”
e5“The amount of nutrient used during the experiment in S, M and L treatments was 10, 24 and 42%, respectively, of the amount used for EC-based management”
Claim · model-written summary
In tomato, nutrient use efficiency under all three QNM treatments was higher than under EC-based management.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- QNM treatmentse6
- Outcome
- Nutrient use efficiency (NUE)e6
- Direction
- highere6
- Qualifier
- defined as marketable fruit yield per unit of the amount of nutrient usede6
- Comparator
- EC-based managemente6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato rockwool hydroponics”
e6“Nutrient use efficiency (NUE), defined as marketable fruit yield per unit of the amount of nutrient used, in all three QNM treatments was higher than in EC-based management”
Claim · model-written summary
Daily QNM can reduce tomato nutrient use without lowering fruit yield and quality under CO2-enriched conditions.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- daily QNMe7
- Outcome
- nutrient usee7
- Direction
- reducee7
- Qualifier
- under CO2-enriched conditionse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato rockwool hydroponics”
e7“daily QNM can reduce nutrient use without lowering fruit yields and quality under CO2-enriched conditions”
Claim · model-written summary
The M or L QNM treatment gives the optimal balance between tomato fruit yield and nutrient use efficiency.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- M or L treatmente1
- Outcome
- optimal balance between fruit yield and NUEe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato rockwool hydroponics”
e1“The M or L treatment provided optimal balance between fruit yield and NUE”
Claim · model-written summary
In tomato, the L treatment gave slightly higher marketable yield than the M treatment.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- L treatmente1
- Outcome
- marketable yielde1
- Direction
- highere1
- Qualifier
- slightlye1
- Comparator
- M treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato rockwool hydroponics”
e1“The L treatment gave slightly higher marketable yield but lower NUE than M treatment”
Claim · model-written summary
In tomato, the L treatment gave lower nutrient use efficiency than the M treatment.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- L treatmente1
- Outcome
- NUEe1
- Direction
- lowere1
- Comparator
- M treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato rockwool hydroponics”
e1“The L treatment gave slightly higher marketable yield but lower NUE than M treatment”
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See all 271 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.