Coapplication of Chicken Litter Biochar and Urea Only to Improve Nutrients Use Efficiency and Yield of Oryza sativa L. Cultivation on a Tropical Acid Soil
Table 3
Biochar rates and fertilization schedule of the pot study.
Plant growth stages
Early tillering growth
Active growth
Formation of stalk
Grain filling
Days after transplanting
15 to 20
35 to 40
50 to 55
70 to 75
Treatments
Biochar rates
g hill−1
T1
0
0
0
0
0
T2
0
Mix A1
0.4
Mix B1
Mix B1
T3
20
Mix A1
0.4
Mix B1
Mix B1
T4
20
0.55 urea only
1.2
0.18 urea only
0.18 urea only
T5
20
0.41 urea only
0.9
0.14 urea only
0.14 urea only
T6
20
0.28 urea only
0.6
0.09 urea only
0.09 urea only
T7
20
0.14 urea only
0.3
0.05 urea only
0.05 urea only
T8
20
0
0
0
0
Mix A1 = (0.55 g urea + 0.50 g TSP + 0.24 g MOP). Mix B1 = (0.18 g urea + 0.19 g TSP + 0.20 g MOP + 0.014 MgO).
