Abstract
본 연구는 논 토양에서 규산질 비료의 성상이 다른 두 종의 규산질 비료의 토양 시비를 통한 토양의 화학적 특성 변화와 벼의 화학적 영양 성분을 평가하고자 수행하였다. 강원도 춘천시 소재 논 토양에서 두 종 (슬래그를 이용한 입상 규산질 비료와 수용성 입상 규산질 비료)의 규산 처리 수준에 따른 토양환경 변화를 보기 위해 무처리와 관행시비, 처리 기준의 0, 1, 2, 4배 처리 후 토양 화학적 변화를 고찰하였다. 슬래그를 이용한 규산질 비료의 처리 시 토양 pH는 시험 전 토양 pH에 비하여 상승하였으나 수용성 규산염을 원료로 한 규산질 비료의 처리 시에는 pH의 변화가 나타나지 않았는데 이는 수용성 규산염의 처리 양이 적고 가수분해율이 적기 때문인 것으로 판단된다. 슬래그를 이용한 규산질 비료를 처리한 구의 토양 유효규산 함량은 15일과 35일까지는 슬래그를 이용한 모든 규산질 비료 처리 구에서 증가하였다. 하지만 처리 60일 후부터는 유효규산 함량이 감소하는 것으로 나타났으나 수용성 규산염을 원료로 한 규산질 비료의 경우에는 토양 유효규산 함량의 증가가 대조구와 비교하여 볼 때 매우 적게 증가한 것으로 나타났다. 슬래그를 이용한 규산질 비료 처리구에서는 처리량에 관계없이 무처리 구에 비해 치환성 칼슘과 유효 인산 함량이 증가하는 것으로 나타났으나 최고 수준 (4배)의 처리구에서의 유효 인산 함량은 비례적으로 증가하지는 않았다. 슬래그를 이용한 규산질 비료 처리구에서의 볏짚의 규산 함량은 무처리구와 관행 처리구에 비해 모두 증가하는 것으로 나타났다. 즉, 규산질 비료를 처리함에 따라 규질비 ($SiO_2$/N)가 증가하였다. 관행 처리구와 슬래그를 이용한 규산질 비료 100% 처리시의 규질비는 각각 8.4와 11.5로 나타났다. 본 실험의 연구 결과를 통하여 슬래그를 이용한 규산질 비료의 토양시비는 토양의 화학적 성질 개선 및 수도 생육을 위해 바람직하나 수용성 규산질 비료의 경우에는 엽면 시비를 통한 액상 분무 등을 통하여 시비를 하는 것이 바람직하다고 판단된다. Application of silicate fertilizers is typically practiced with several year's interval to amend soil quality and improve rice productivity at the paddy field in Korea. Most of silicate fertilizers applied in Korea is slag-originated silicate fertilizer. Some water soluble silicate fertilizers are manufactured and commercially available. The objective of this study was to assess changes of soil chemical properties in paddy field by applying slag-originated silicate fertilizer and water soluble silicate fertilizer. Field experiment was conducted on a silt loam paddy soil, where four levels of each silicate fertilizer were applied in soil at the rate of 0, 1, 2, 4 times of the recommended levels. Application of slag-originated silicate fertilizer increased soil pH, while no significant pH increase occurred with the treatment of water soluble silicate fertilizers. Soil pH increased 0.4~0.5 with the 1 time of recommended level of slag-originated silicate fertilizer. Available $SiO_2$ contents also significantly increased with the treatment of slag-originated silicate fertilizer at 15 and 35 days after treatment, while decreased after 60 days after treatment possibly due to rice uptake. Exchangeable Ca, Mg and available phosphate contents in soil increased with application of slag-originated silicate fertilizer, while a little increases for them were shown with the application of soluble silicate fertilizer. $SiO_2$/N ratios in rice straw for 1 time of recommended level of slag-originated silicate fertilizer was 11.5, while that of control was 8.4, which was much lower value. Throughout this study, soil application of slag-originated silicate fertilizer enhanced soil chemical properties, while water soluble silicate fertilizer application in soil needs further study resulting in a little effects on soil property.
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Claims 10
Claim · model-written summary
Slag-originated silicate fertilizer increased soil pH.
- Taxon
- rice
Oryza sativae1 - Treatment
- slag-originated silicate fertilizere0
- Outcome
- soil pHe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of slag-originated silicate fertilizer increased soil pH”
e1“rice productivity”
Claim · model-written summary
Water soluble silicate fertilizer produced no significant soil pH increase.
- Taxon
- riceOryza sativae1
- Treatment
- water soluble silicate fertilizerse0
- Outcome
- pHe0
- Direction
- no significant pH increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant pH increase occurred with the treatment of water soluble silicate fertilizers”
e1“rice productivity”
Claim · model-written summary
One recommended dose of slag fertilizer increased soil pH by 0.4~0.5.
- Taxon
- riceOryza sativae1
- Treatment
- 1 time of recommended level of slag-originated silicate fertilizere0
- Outcome
- Soil pHe0
- Direction
- increasede0
- Value
- 0.4~0.5e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil pH increased 0.4~0.5 with the 1 time of recommended level of slag-originated silicate fertilizer”
e1“rice productivity”
Claim · model-written summary
Slag fertilizer significantly increased available soil SiO2 at 15 and 35 days.
- Taxon
- riceOryza sativae1
- Treatment
- slag-originated silicate fertilizere0
- Outcome
- Available $SiO_2$ contentse0
- Direction
- increasede0
- Qualifier
- 15 and 35 days after treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Available $SiO_2$ contents also significantly increased with the treatment of slag-originated silicate fertilizer at 15 and 35 days after treatment”
e1“rice productivity”
Claim · model-written summary
Available soil SiO2 declined after 60 days.
- Taxon
- riceOryza sativae0
- Outcome
- rice uptakee0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased after 60 days after treatment possibly due to rice uptake”
Claim · model-written summary
Slag fertilizer increased soil exchangeable Ca, Mg and available phosphate.
- Taxon
- riceOryza sativae1
- Treatment
- slag-originated silicate fertilizere0
- Outcome
- Exchangeable Ca, Mg and available phosphate contents in soile0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exchangeable Ca, Mg and available phosphate contents in soil increased with application of slag-originated silicate fertilizer”
e1“rice productivity”
Claim · model-written summary
Soluble silicate fertilizer gave small increases in soil Ca, Mg and phosphate.
- Taxon
- riceOryza sativae1
- Treatment
- soluble silicate fertilizere0
- Outcome
- Exchangeable Ca, Mg and available phosphate contents in soile0
- Direction
- a little increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exchangeable Ca, Mg and available phosphate contents in soil increased with application of slag-originated silicate fertilizer, while a little increases for them were shown with the application of soluble silicate fertilizer”
e1“rice productivity”
Claim · model-written summary
Rice straw SiO2/N ratio was 11.5 with one recommended slag dose versus 8.4 in control.
- Taxon
- riceOryza sativae0
- Treatment
- 1 time of recommended level of slag-originated silicate fertilizere0
- Outcome
- $SiO_2$/N ratios in rice strawe0
- Direction
- much lowere0
- Value
- 11.5e0
- Qualifier
- 8.4e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“$SiO_2$/N ratios in rice straw for 1 time of recommended level of slag-originated silicate fertilizer was 11.5, while that of control was 8.4, which was much lower value”
Claim · model-written summary
The authors considered soil application of slag fertilizer beneficial for soil chemistry.
- Taxon
- riceOryza sativae1
- Outcome
- soil application of slag-originated silicate fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil application of slag-originated silicate fertilizer enhanced soil chemical properties”
e1“rice productivity”
Claim · model-written summary
The authors said soil application of water soluble silicate fertilizer needs further study.
- Taxon
- riceOryza sativae1
- Outcome
- water soluble silicate fertilizer application in soil needs further studye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water soluble silicate fertilizer application in soil needs further study resulting in a little effects on soil property”
e1“rice productivity”
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