Abstract
이 실험은 관비재배시 토양 pH와 질소 비종이 토마토 생육과 토양화학성에 미치는 영향에 대해 조사하고자 수행하였다. 시험작물은 동양계 품종인 '슈퍼도태랑'을 이용하여 18 L포트에서 3개월간 재배하였으며 토양 pH를 6.88과 8.77 두수준으로 조절하였다. 주요 관비 비종인 요소, 질산암모늄, 황산암모늄, 질산칼륨를 이용하였으며 관비 농도는 0, 10, 50, 100 mg N/L로 조절하였다. 토양의 pH가 8.77일 때 pH 6.88에 비하여 수량과 엽록소 형광반응이 감소하였으나 질산암모늄과 황산암모늄을 이용하여 관비할 경우 토마토 수량이 증가하는 것으로 나타났다. pH 6.88일 경우 비종보다는 관비 농도가 증가할수록 수량이 증가하였다. 토마토 재배후 비종에 따른 화학성 변화를 살펴보면 토양의 pH는 질산암모늄과 황산암모늄을 시용하였을 경우 감소하였으며 질산 칼륨 시용 시 토양 pH와 칼륨함량이 높아졌다. 토양 내 EC는 황산암모늄 100 mg N/L 시용 시 다른 비종에 비하여 2배 이상 높아졌다. 질산태질소와 암모늄태 질소는 비종별로 크게 차이는 없었지만 pH가 높을 때 토양 내 함량이 적은 것으로 나타났다. 이 실험 결과 요소와 질산암모늄을 관비용 비종으로 이용하면 토마토 재배 전 후 토양화학성의 변화가 크지 않은 것으로 나타났다. This study was conducted to determine effects of soil pH and form of nitrogen fertilizers on tomato growth and chemical properties of greenhouse soil using ferigation system. Tomato (Lycopersicon esculentum Mill. cv. Superdoterang) were grown for three months in 18 L pots filled with two soil (pH 6.8 and pH 8.7). 4 different nitrogen fertilizers (urea, ammonium nitrate, ammonium sulfate, and potassium nitrate) were fertigated with different concentrations of 0, 10, 50, and 100 mg N/L during tomato cultivation. Soil pH 8.7 decreased yield and chlorophyll fluorescence compared with soil pH 6.8. Yield at soil pH 8.7 increased by ammonium nitrate and ammonium sulfate fertigation. Soil pH 6.8 induced increment of yield by nitrogen concentration than form of nitrogen fertilizers. Soil pH after cultivation of tomato decreased by application of ammonium nitrate and ammonium sulfate. Soil EC by 100 mg N/L application of ammonium sulfate was twice as much as other fertilizers. Form of nitrogen fertilizer had less effect on concentration of soil $NH_4^+$-N and $NO_3^-$-N in soil but the concentrations slightly reduced at pH 8.7. These results indicate that application of urea and ammonium nitrate for a nitrogen source of fertigation has little affects on soil chemical properties before and after tomato cultivation.
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Claims 8
Claim · model-written summary
Soil pH 8.7 decreased tomato yield and chlorophyll fluorescence compared with soil pH 6.8.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- Soil pH 8.7e0
- Outcome
- yield and chlorophyll fluorescencee0
- Direction
- decreasede0
- Comparator
- soil pH 6.8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Changes of Tomato Growth”
e0“Soil pH 8.7 decreased yield and chlorophyll fluorescence compared with soil pH 6.8”
Claim · model-written summary
At soil pH 8.7, tomato yield increased under ammonium nitrate and ammonium sulfate fertigation.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- ammonium nitrate and ammonium sulfate fertigatione1
- Outcome
- Yielde1
- Direction
- increasede1
- Qualifier
- at soil pH 8.7e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Changes of Tomato Growth”
e1“Yield at soil pH 8.7 increased by ammonium nitrate and ammonium sulfate fertigation”
Claim · model-written summary
At soil pH 6.8, nitrogen concentration raised tomato yield more than the form of nitrogen fertilizer did.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- nitrogen concentratione2
- Outcome
- yielde2
- Direction
- incremente2
- Qualifier
- Soil pH 6.8e2
- Comparator
- form of nitrogen fertilizerse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Changes of Tomato Growth”
e2“Soil pH 6.8 induced increment of yield by nitrogen concentration than form of nitrogen fertilizers”
Claim · model-written summary
Soil pH after tomato cultivation decreased under ammonium nitrate and ammonium sulfate application.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- application of ammonium nitrate and ammonium sulfatee3
- Outcome
- Soil pH after cultivation of tomatoe3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Changes of Tomato Growth”
e3“Soil pH after cultivation of tomato decreased by application of ammonium nitrate and ammonium sulfate”
Claim · model-written summary
Soil EC under 100 mg N/L ammonium sulfate was about twice that under other fertilizers.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 100 mg N/L application of ammonium sulfatee4
- Outcome
- Soil ECe4
- Direction
- higherinferrede4
- Value
- twice as muche4
- Comparator
- other fertilizerse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Changes of Tomato Growth”
e4“Soil EC by 100 mg N/L application of ammonium sulfate was twice as much as other fertilizers”
Claim · model-written summary
The form of nitrogen fertilizer had less effect on soil concentration.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Form of nitrogen fertilizere5
- Outcome
- concentration of soile5
- Direction
- less effecte5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Changes of Tomato Growth”
e5“Form of nitrogen fertilizer had less effect on concentration of soil”
Claim · model-written summary
Soil nitrogen concentrations were slightly reduced at soil pH 8.7.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- pH 8.7e6
- Outcome
- concentrationse6
- Direction
- reducede6
- Qualifier
- slightlye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Changes of Tomato Growth”
e6“the concentrations slightly reduced at pH 8.7”
Claim · model-written summary
Urea and ammonium nitrate are suitable nitrogen sources for fertigation because they change soil chemical properties little.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- application of urea and ammonium nitratee7
- Outcome
- soil chemical propertiese7
- Qualifier
- before and after tomato cultivatione7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Changes of Tomato Growth”
e7“application of urea and ammonium nitrate for a nitrogen source of fertigation has little affects on soil chemical properties before and after tomato cultivation”
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