표제지
목차
I. 서언 6
II. 연구사 8
III. 재료 및 방법 12
IV. 결과 및 고찰 16
1. 유통채소류의 질산염 함량 16
2. 시비수준에 따른 수량 및 질산염 함량 20
3. 비종간 수량 및 질산염 함량 26
4. 수확시기별 저장기간에 따른 질산염 함량의 변화 28
V. 적요 30
참고문헌 32
ABSTRACT 36
Table 1. Chemical properties of soil before experiment. 12
Table 2. Application rate of fertilizer to lettuce and spinach. 13
Table 3. Chemical properties of soil before experiment. 14
Table 4. Application rate of fertilizer for regulating nitrate concentration of lettuce and spinach. 15
Table 5. Distribution of nitrate content in leaf vegetables collected. 17
Table 6. Distribution of nitrate content in fruit vegetables collected. 19
Table 7. Distribution of nitrate content in root and other vegetables collected. 20
Table 8. Yield of lettuce by application rate. 21
Table 9. Nitrate content in lettuce by application rate. 22
Table 10. Macro-nutrients of lettuce by application rate. 23
Table 11. Yield of spinach and nitrate content in spinach by application rate. 24
Table 12. Macro-nutrients of spinach by application rate. 25
Table 13. Yield of lettuce by fertilizers. 26
Table 14. Nitrate content in lettuce by fertilizer. 26
Table 15. Yield of spinach and nitrate content in spinach by fertilizer. 27
Table 16. Nitrate content in lettuce by harvesting time. (1999 9.28) 28
Table 17. Nitrate content in lettuce by reserve time. 29
Fig. 1. Distribution of Nitrate content in Spinach. 17
Fig. 2. Distribution of nitrate content in lettuce. 18
Fig. 3. Distribution of nitrate content in Chinese cabbage. 19