化学的緩効性肥料 - BSI生物科学研究所

1 BSI 1 controlled release fertilizer by chemical modification UF CDU IB 5 7 UF urea formaldehyde UF 1930 1955 BASF 1.

2 BSI 2 M2U 2M3U 3M4U 4M5U n n+1 1 U F U/F U/F 1. 2 2. 5M6U cold water soluble nitrogen CWN 25 C cold water insoluble nitrogen CWIN 25 C 15min hot water soluble nitrogen HWN 100 C hot water insoluble nitrogen HWIN 100 C 30min activity index

3 AI BSI 3 AI = 100% 2 3 20 60 35 TN WN 50 UN 20 WN/TN 50 AI 40 2.

4 NH2 CONH2 CH2O 2 NH2 CONH2 + HCHO NH2 CONHCH2OH NH2 CONHCH2OH + HCHO HOCH2 NHCONHCH2OH NH2 CONH2 + NH2 CONHCH2OH NH2 CONHCH2 NHCONH2 + H2O NH2 CONH2 + HOCH2 NHCONHCH2OH NH2 CONHCH2 NHCONHCH2 NHCONH2 + H2O BSI 4 3.

5 3-1. 3 1234 1. 1 2. 2 3. 4. 3. 35 37 1 1 pH8 9 1 1 40 60 C 60 120min U/F 1 2 2 pH4 5 40 60 C 4 5

6 80 C AI 3-2. BSI 5 4 1234 51. 2. 1 3. 2 4. 5. 6. 6 4. 1 30 50 pH8 9 1 2 60 80 C 45 60min U/F 1 2 3 pH4 5 40 60 C 4 2 3 1 2 U/F 1

7 1 4. U/F pH U/F U/F U/F U/F BSI 6 U/F 80 C pH pH

8 2 1 pH8~10 2 pH3 5 1 2 IB N,N''-(Isobutylidene)bisurea IBDU IB 1960 1964 C6H14N4O2 31 33% 1/1000 5 5.

9 BSI 7 1. NH2 CONH2 (CH3)2 CHCHO 2NH2 CONH2 + (CH3)2 CHCHO C6H14N4O2 + H2O 2. pH 2-1. pH3 5 6 123 1.

10 2. 3. 6. 1 pH3 60 70 C U/I 2 1 20 30min 10 20mm 7 1 30 50 pH3 2 50 C 70 C 20 30min 10 30min 3 BSI 8 1234