Abstract
Effects of rice husk compost (RHC) on some soil quality parameters under greenhouse conditions were investigated. Experiment were conducted in a randomized plot design with different application doses of RHC (0, 3, 6 and 9%) into surface soil (0-20 cm) with three replications in a greenhouse of Agricultural Faculty in Ondokuz Mays University. RHC application generally improved the soil quality parameters according to the control treatment during the experiment carried out with growing tomato plant in the greenhouse in 2010. The soil organic matter (OM) contents significantly increased by the application of RHC in the following order; 9%>6%>3%>0%. While RHC applications in the greenhouses significantly reduced pH contents of soils according to the control, the RHC application increased the values of respiration rate (CO2), EC, NO3-N and available phosphorus (P). While the exchangeable Ca values of soils generally decreased, the exchangeable Mg and K values generally increased according to the control with RHC application. Bulk density (BD) values in the greenhouse were reduced with RHC application doses in the following order 0%>3%> 6%>9%. The values of field capacity (FC), permanent wilting point (PWP) and available water capacity (AWC) generally increased according to the control with the application of RHC dosses in the following order 9%>6%>3%. The highest positive correlations among the physical, chemical and biological properties were found between OM and PWP (0.924**), AWC and FC (0.907**), OM and FC (0.897**), CO2 and PWP (0.862**), PWP and FC (0.791**); while the highest negative correlations were found between BD and FC (-0.854**), BD and PWP (-0.871**), BD and OM (-0.868**), BD and CO2 (-0.838**), BD and P (-0.821**), Ca and FC (-0.812**). The highest tomato yield (7.77 ton/da) was obtained with the 9% of RHC application. RHC application to the soil in greenhouse generally improved soil quality and tomato yield.
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Claims 9
Claim · model-written summary
Rice husk compost increased soil organic matter, ordered 9% > 6% > 3% > 0%.
- Taxon
- tomato plant
Solanum lycopersicume1 - Treatment
- application of RHCe0
- Outcome
- soil organic matter (OM) contentse0
- Direction
- increasede0
- Qualifier
- 9%>6%>3%>0%e0
- Comparator
- 0%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil organic matter (OM) contents significantly increased by the application of RHC in the following order; 9%>6%>3%>0%.”
e1“growing tomato plant”
Claim · model-written summary
RHC reduced greenhouse soil pH relative to control.
- Taxon
- tomato plantSolanum lycopersicume1
- Treatment
- RHC applicationse0
- Outcome
- pH contents of soilse0
- Direction
- reducede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RHC applications in the greenhouses significantly reduced pH contents of soils according to the control”
e1“growing tomato plant”
Claim · model-written summary
RHC increased soil respiration rate, EC and NO3-N.
- Taxon
- tomato plantSolanum lycopersicume1
- Treatment
- RHC applicatione0
- Outcome
- respiration rate (CO2), EC, NO3-Ne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the RHC application increased the values of respiration rate (CO2), EC, NO3-N and available phosphorus (P)”
e1“growing tomato plant”
Claim · model-written summary
RHC increased soil available phosphorus.
- Taxon
- tomato plantSolanum lycopersicume1
- Treatment
- RHC applicatione0
- Outcome
- available phosphorus (P)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the RHC application increased the values of respiration rate (CO2), EC, NO3-N and available phosphorus (P)”
e1“growing tomato plant”
Claim · model-written summary
RHC generally decreased exchangeable soil Ca.
- Taxon
- tomato plantSolanum lycopersicume2
- Treatment
- RHC applicatione1
- Outcome
- exchangeable Ca values of soilse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exchangeable Ca values of soils generally decreased”
e1“with RHC application. Bulk density”
e2“growing tomato plant”
Claim · model-written summary
RHC generally increased exchangeable soil Mg and K relative to control.
- Taxon
- tomato plantSolanum lycopersicume1
- Treatment
- RHC applicatione0
- Outcome
- exchangeable Mg and K valuese0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the exchangeable Mg and K values generally increased according to the control with RHC application”
e1“growing tomato plant”
Claim · model-written summary
RHC reduced soil bulk density, ordered 0% > 3% > 6% > 9%.
- Taxon
- tomato plantSolanum lycopersicume1
- Treatment
- RHC application dosese0
- Outcome
- Bulk density (BD) valuese0
- Direction
- reducede0
- Qualifier
- 0%>3%> 6%>9%e0
- Comparator
- 0%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulk density (BD) values in the greenhouse were reduced with RHC application doses in the following order 0%>3%> 6%>9%.”
e1“growing tomato plant”
Claim · model-written summary
RHC generally increased field capacity, permanent wilting point and available water capacity.
- Taxon
- tomato plantSolanum lycopersicume1
- Treatment
- application of RHC dossese0
- Outcome
- field capacity (FC), permanent wilting point (PWP) and available water capacity (AWC)e0
- Direction
- increasede0
- Qualifier
- 9%>6%>3%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The values of field capacity (FC), permanent wilting point (PWP) and available water capacity (AWC) generally increased according to the control with the application of RHC dosses in the following order 9%>6%>3%.”
e1“growing tomato plant”
Claim · model-written summary
The highest tomato yield, 7.77 ton/da, occurred with 9% RHC.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- 9% of RHC applicatione0
- Outcome
- tomato yielde0
- Direction
- higheste0
- Value
- 7.77 ton/dae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest tomato yield (7.77 ton/da) was obtained with the 9% of RHC application.”
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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.