1112
,7t/ha,21mg/100gP2O5,25mg/100g2O,,6,5t/ha. =7t/ha P2O5=21mg/100g 2O =25mg/100g Rp =6,5t/ha
mg/100g P2O5
K2O , %P2O5 K2O
() () 5 5 (+100-200% ) 100
() 5-10 5-10 (+30-50% )
80-90
( ) 10-15 10-15 (+10-30% )
60-70
( ) 15-25 15-25 ( )
50-60
( ) 25-40 25-40 ( 20-30% )
30-40
( )
40-50 40-50
( 1-3 )
1-3
() 50 50
. ,
. 2. (AL , Egner, Riehm, 1958) (, 1988)
.17t/ha : N26kg/t*7t/ha=182kg/7t/ha P2O511kg/t*7t/ha=77kg/7t/ha 2O25kg/t*7t/ha=175kg/7t/ha
5060%:
N182kg/ha P2O577kg/ha 2O88 kg/ha
(.4):
N0 kg/ha P2O532,5 kg/ha (1t 5kg=6,5t xkg) 2O130 kg/ha(1t 20kg=6,5t xkg)
7t/ha:
N182 0 =182kg/ha P2O577 32,5 =44,5kg/ha 2O88 130 = 42kg/ha
: N182kg/ha P2O544,5~ 45 kg/ha 2O0kg/ha
kg/t
N P2O5 K2O CaO MgO
26 13 22 5 4
` 24 12 26 6 4
22 14 23 8 3
28 12 29 6 4
26 11 25 6 8
4 2 6 2 1
35 30 55 62 5
51 28 51 52 10
70 15 28 28 7
60 15 35 30 6
58 15 35 22 5
66 15 35 18 6
67 17 36 16 7
62 15 30 25 5
28 7 18 29 3
28 5 18 20 5
5 2 8 3 1
14 2 14 3 -
3 1 4 4 -
3 1 3 1 -
3 1 4 5 -
4 2 4 1 -
2 1 5 1 -
2 1 3 1 -
3 1 4 3 -
1.
kg/t
N P2O5 K2O MgO
- 4,0 13,0 2,0
- 3,0 15,0 2,0
- 3,0 12,0 1,0
- 4,0 25,0 2,0
- 10,0 50,0 7,0
- 5,0 20,0 4,0
10,0 7,0 27,0 1,0
10,0 7,0 17,0 1,0
- 0,3 1,0 0,8
0,3 0,3 2,0 0,5
0,3 0,8 4,7 0,7
4. (BASF, 1991)
=/m2 (ha)/1000
=(%)(%)/100
=(kg)/100=(kg/ha)
600/2,35g,98%95%.
=600/m235g/1000 =21g/m2
21g/m2 10000=210000g/ha=210kg/ha
=98 95/100 =93,1%
=210kg/ha/93,1%x100=226kg/ha(93%)
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