The Influence of Form and Rate on the Efficacy of Matrix-Based Fertilizers to Reduce Nutrient Leaching
Table 2
Chemical compounds used to comprise three different matrix-based fertilizers in experiment 2: fertilizer rate(a)
Treatment
1
2
3
4
5
6
7
8
9
10
Compound
CONT
SRF
MBF4
MBF5
SRF
MBF4
MBF5
SRF
MBF4
MBF5
Low Rate
Moderate Rate
High Rate
g compound in each column
NH4 NO3
0.000
0.210
0.000
0.000
0.420
0.000
0.000
0.630
0.000
0.000
P2O5
0.000
0.200
0.000
0.000
0.400
0.000
0.000
0.600
0.000
0.000
K2O
0.000
0.180
0.180
0.180
0.360
0.360
0.360
0.540
0.540
0.540
Ca(NO3)2 4H2O
0.000
0.000
0.472
0.236
0.000
0.944
0.472
0.000
1.888
0.944
Al(NO3)3 9H2O
0.000
0.000
0.750
0.000
0.000
1.500
0.000
0.000
3.000
0.000
NH4(H2PO4)
0.000
0.000
0.230
0.115
0.000
0.460
0.230
0.000
0.920
0.460
Ca(H2PO4)2
0.000
0.000
0.468
0.234
0.000
0.936
0.468
0.000
1.872
0.936
Fe(P2O7)
0.000
0.000
0.334
1.490
0.000
0.668
2.980
0.000
1.336
5.960
Al2(PO4)3
0.000
0.000
0.360
0.000
0.000
0.720
0.000
0.000
1.440
0.000
Al2(SO4)3 18H2O
0.000
0.000
0.366
0.000
0.000
0.732
0.000
0.000
1.464
0.000
Fe2(SO4)3 3H2O
0.000
0.000
0.800
1.600
0.000
1.600
3.200
0.000
3.200
6.400
Starch
0.000
0.000
1.000
1.000
0.000
1.000
1.000
0.000
1.000
1.000
Chitosan
0.000
0.000
1.000
1.000
0.000
1.000
1.000
0.000
1.000
1.000
Lignin
0.000
0.000
1.000
1.000
0.000
1.000
1.000
0.000
1.000
1.000
At the low rate: MBF4 = 243 kg N and 262 kg P ; MBF5 = 121 kg N and 236 kg P ; SRF is the slow release fertilizer 5.0 g of Osmocote (14-14-14) = 267 kg N and 255 kg P and 159 kg K . At the moderate rate: MBF4 = 486 kg N and 524 kg P ; MBF5 is 242 kg N and 472 kg P ; SRF is the slow release fertilizer 10.0 g of Osmocote (14-14-14) = 534 kg N and 510 kg P . At the high rate: MBF4 = 729 kg N and 786 kg P ; MBF5 = 363 kg N and 708 kg P ; SRF is the slow release fertilizer 15 g of Osmocote (14-14-14) = 801 kg N , 765 kg P , and 477 kg K .
