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목차

Ⅰ. 요약 8

Ⅱ. 서론 10

Ⅲ. 재료 및 방법 16

1. 밭토양의 유효규산 분석법 검토 16

1) 토양시료 및 분석방법 16

(1) 0.5 N HCl 용액 침출 16

(2) 1 N NaOAc (pH 4.0) 용액 침출 16

(3) Citric Acid 1% 용액 침출 16

(4) Water 침출 16

(5) Tris buffer (pH 7.0) 용액 침출 16

(6) Incubation method 17

2. 참외의 규산 이용과 토양 유효규산의 관계 17

1) 시료수집 17

2) 분석방법 17

3. 밭토양에서 규산질 비료의 유효화 및 유효인산과 pH에 미치는 영향 18

1) 토양시료 및 특성 18

2) 토양조제 19

3) 토양완충능 시험 20

4) 석회처리량에 따른 토양 유효규산 함량 변화 20

Ⅳ. 결과 및 고찰 21

1. 밭토양의 유효규산 분석법 검토 21

2. 참외의 규산 흡수와 토양 유효규산의 관계 29

3. 밭토양에서 규산질 비료 적정 시용량 30

1) 규산질 비료 처리 수준별 유효규산 함량 변화 30

2) 석회처리에 따른 토양 유효규산 함량 변화 35

3) 밭토양에서 규산질 비료 적정 시비량 추정 38

4. 밭토양에서 규산질 비료 시용으로 인한 토양 pH와 유효인산 함량 변화 42

1) 규산질 비료 시용과 토양 pH의 경시적 변화 42

2) 규산질 비료 시용과 토양 유효인산 함량의 경시적 변화 51

Ⅴ. 참고문헌 62

Abstract 69

표목차

Table 1. Physicochemical properties of the soils used for the experiment 19

Table 2. Application rate of silicate fertilizer in soils used for the experiment 19

Table 3. Soils prepared for the experiment 20

Table 4. Increment of available SiO2 concentration in soils with silicate fertilizer application rate 39

Table 5. Degree of availability by silicate fertilizer application in various upland soils 39

Table 6. Increment of pH in soils with silicate fertilizer application rate 48

그림목차

Fig. 1. Relationship between available SiO2 and plant SiO2 in various upland soils 23

Fig. 2. Relationship between available SiO2 and plant SiO2 in various upland soils 24

Fig. 3. Relationship between available SiO2 and plant SiO2 in various upland soils 25

Fig. 4. Relationship between available SiO2 and plant SiO2 in various upland soils 26

Fig. 5. Relationship between available SiO2 and plant SiO2 in various upland soils 27

Fig. 6. Relationship between available SiO2 and plant SiO2 in various upland soils 28

Fig. 7. Changes of available SiO2 concentration in soil A during the experiment 31

Fig. 8. Changes of available SiO2 concentration in soil B during the experiment 32

Fig. 9. Changes of available SiO2 concentration in soil C during the experiment 33

Fig. 10. Changes of available SiO2 concentration in soil D during the experiment 34

Fig. 11. Changes of pH with different treatments of lime in soil D 36

Fig. 12. Changes of available SiO2 concentration with different treatments of lime in soil D 37

Fig. 13. Changes of available SiO2 concentration with different silicate fertilizer treatments after 60 days of incubation period 41

Fig. 14. Changes of pH in soil A during the experiment 44

Fig. 15. Changes of pH in soil B during the experiment 45

Fig. 16. Changes of pH in soil C during the experiment 46

Fig. 17. Changes of pH in soil D during the experiment 47

Fig. 18. Changes of soil pH at different silicate fertilizer treatments after 60days of incubation period 49

Fig. 19. pH buffering of soils 50

Fig. 20. Changes of available P concentration in soil A during the experiment 53

Fig. 21. Changes of available P concentration in soil B during the experiment 54

Fig. 22. Changes of available P concentration in soil C during the experiment 55

Fig. 23. Changes of available P concentration in soil D during the experiment 56

Fig. 24. Changes of available P concentration in soil A at different silicate fertilizer treatments after 60 days of incubation period 58

Fig. 25. Changes of available P concentration in soil B at different silicate fertilizer treatments after 60 days of incubation period 59

Fig. 26. Changes of available P concentration in soil C at different silicate fertilizer treatments after 60 days of incubation period 60

Fig. 27. Changes of available P concentration in soil D at different silicate fertilizer treatments after 60 days of incubation period 61