By Dr. Pranesh Kumar Saha, Md. Nazrul Islam, Md. Imran Ullah Sarkar Revitalizing the Ganges Coastal Zone Conference 21-23 October 2014, Dhaka, Bangladesh http://waterandfood.org/ganges-conference/

1. Welcome to
Presentation
Bangladesh Rice Research Institute

2. Bangladesh Rice Research Institute
Fertilizer Management for Rice in Ganges Tidal Coastal Zone
Dr. Pranesh Kumar Saha,
Chief Scientific Officer, Soil Science Division, BRRI
Md. Nazrul Islam
Scientific Officer, Soil Science Division, BRRI
Md. Imran Ullah Sarkar
Scientific Officer, Soil Science Division, BRRI

3. Introduction
Bangladesh Rice Research Institute
 The coastal area covers about 20% of Bangladesh and
over thirty percent of the net cultivable area. It extends
inside up to 150 km from the coast.
 Out of 2.85 million hectares of the coastal and offshore
areas about 0.83 million hectares are arable lands, which
cover over 30% of the total cultivable lands of Bangladesh.

4. Cont’d
Bangladesh Rice Research Institute
 The dominant rice crop in the coastal area is the local T.
Aman rice.
 Rice is the predominant crop in Bangladesh but saline
tolerant modern rice cultivars are few in number.
 The people of that area have been cultivating saline
tolerant local rice varieties for more than 100 years only
in T. Aman season.

5. Cont’d.
Bangladesh Rice Research Institute
 The yield potential of those traditional varieties are low
(2.0-2.5 t/ha/year).
 The need of the hour is to achieve substantially higher
crop yield than the present yield levels from our limited
land resources on a sustainable basis.

6. Contd.
Bangladesh Rice Research Institute
 A crop production system with high yield targets
cannot be sustainable unless nutrient inputs to soil
are at least balanced against nutrient removal by
crops.
 Proper soil fertility management, therefore, is one of
the prime importance in an endeavor to increase crop
productivity.

7. Objectives:
Bangladesh Rice Research Institute
 To increase the productivity of MV rice through
integrated fertilizer management
 To increase the awareness about BRRI soil
management technologies among farmers

8. Methodology:
Bangladesh Rice Research Institute
The following treatments were Included in this study. The
experiments were set up with non replicated. The unit plot
size is 8m x 6m.
2012-13 2013-14
T1: BRRI recommended dose
T2: IPNS + Rice Straw (4.5 t/ha,
Sun dry basis)
T3: Farmers' Practice
T1: BRRI recommended dose
T2: IPNS + Cow dung (3 t/ha,
Oven dry basis)
T3: Farmers' Practice

9. Location:
Bangladesh Rice Research Institute
Village Upozila District
Lakhmipasha and Dudhalmou Bakergonj
BarisalShibpasha Barisal sadar
Mothershi, South Morakathi Ujirpur
Chouddoburia Nalchity
Jhalkathi
Agoilpasha, Khadoikhira and Rupsia Jhalkathi sadar
Naldoani, Kartikpasha, South
Pangashia and North Pangashia
Dumki
Patuakhali
West Sarikkhali Patuakhali sadar
Ghatkhali Amtoli Barguna

10. Initial soil characteristics of experimental plot
Bangladesh Rice Research Institute
Characteristics Ujirpur Amtoli
Jhalkathi
sadar
Nalchiti
pH 6.0-7.2 6.3-7.5 5.5-6.8 5.4-7.0
OM (%) 1.23-2.10 1.20-2.30 1.30-1.70 1.42-2.16
Total N (%) 0.13-0.20 0.10-0.12 0.13-0.15 0.09-0.15
Available P (mg/kg) 7-16 4-14 8-14 10-18
Available K (Cmol/kg) 0.20-0.24 0.20-0.27 0.16-0.22 0.18-0.23
Available S (mg/kg) 19-28 35-44 22-36 26-37
Available Zn (mg/kg) 0.8-1.6 0.7-1.8 1.3-2.0 1.0-2.3

11. Bangladesh Rice Research Institute
Characteristics Bakergonj Dumki Barisal sadar
pH 5.6-6.0 6.5-7.4 6.2-6.7
OM (%) 1.72-2.19 1.50-1.70 1.13-1.89
Total N (%) 0.09-0.11 0.09-0.12 0.10-0.19
Available P (mg/kg) 12-19 9-14 8-17
Available K (Cmol/kg) 0.21-0.26 0.23-0.25 0.17-0.23
Available S (mg/kg) 24-40 20-34 23-35
Available Zn (mg/kg) 1.8-2.2 0.8-2.4 0.6-1.5
Cont’d

12. Treatment details of the experiment, 2012-2013
Bangladesh Rice Research Institute
1T1 & T2 – N was applied from the source of urea super granule (USG) and T3- from the source of
pilled urea (PU)
2IPNS was followed in all elements (P, K, S and Zn) except N due to the application of USG
Treatments T. Aus
N1 P K S Zn
kg/ha
T1: BRRI recommended dose (AEZ basis) 50 11 15 3 1
T2: Rice Straw (4.5 t/ha, sun dry basis)+ IPNS
basis chemical fertilizer2 50 7 0 0 1
T3: Farmers' Practice (FP) 37 15 10 0 0

13. Cont’d
Bangladesh Rice Research Institute
1T1 & T2 – N was applied from the source of urea super granule (USG) and T3- from the source of
pilled urea (PU)
2IPNS was followed in all elements (P, K, S and Zn) except N due to the application of USG
Treatments T. Aman
N1 P K S Zn
kg/ha
T1: BRRI recommended dose (AEZ basis) 50 15 17 4 2
T2: Rice Straw (4.5 t/ha, sun dry basis)+
IPNS basis chemical fertilizer2 50 11 0 0 1.8
T3: Farmers' Practice (FP) 42 25 0 0 0

14. Bangladesh Rice Research Institute
Contd.
1T1 & T2 – N was applied from the source of urea super granule (USG) and T3- from the source of
pilled urea (PU)
2IPNS was followed in all elements (P, K, S and Zn) except N due to the application of USG
Treatments Boro
N1 P K S Zn
kg/ha
T1: BRRI recommended dose (AEZ basis) 75 30 30 6 3
T2: Rice Straw (4.5 t/ha, sun dry basis)+ IPNS
basis chemical fertilizer2 75 25 0 1.5 2.5
T3: Farmers' Practice (FP) 114 25 41 7 6

15. Treatment details of the experiment, 2013-2014
Bangladesh Rice Research Institute
1T1 & T2 – N was applied from the source of urea super granule (USG) and T3- from the source of
pilled urea (PU)
2IPNS was followed in all elements (P, K, S and Zn) except N due to the application of USG
Treatments T. Aus
N1 P K S Zn
kg/ha
T1: BRRI recommended dose (AEZ basis) 50 11 15 3 1
T2: Cowdung (3 t/ha, oven dry basis)+ IPNS
basis chemical fertilizer2 50 0 0 0 0.7
T3: Farmers' Practice (FP) 37 15 10 0 0

16. Cont’d
Bangladesh Rice Research Institute
1T1 & T2 – N was applied from the source of urea super granule (USG) and T3- from the source of
pilled urea (PU)
2IPNS was followed in all elements (P, K, S and Zn) except N due to the application of USG
Treatments T. Aman
N1 P K S Zn
kg/ha
T1: BRRI recommended dose (AEZ basis) 50 15 17 4 2
T2: Cowdung (3 t/ha, oven dry basis)+ IPNS
basis chemical fertilizer2 50 0 0 0 1.7
T3: Farmers' Practice (FP) 42 25 0 0 0

17. Contd.
Bangladesh Rice Research Institute
1T1 & T2 – N was applied from the source of urea super granule (USG) and T3- from the source of
pilled urea (PU)
2IPNS was followed in all elements (P, K, S and Zn) except N due to the application of USG
Treatments Boro
N1 P K S Zn
kg/ha
T1: BRRI recommended dose (AEZ basis) 75 30 30 6 3
T2: Cowdung (3 t/ha, oven dry basis)+ IPNS
basis chemical fertilizer2 75 6 0 0 2.7
T3: Farmers' Practice (FP) 114 25 41 7 6

18. Chemical composition of rice straw and cowdung
Bangladesh Rice Research Institute
Organic matter N (%) P (%) K (%) S (%) Zn (%)
Rice straw 0.5 0.08 1.6 0.09 0.01
Cowdung 1.2 0.8 1.3 0.13 0.01
Source: Saha et al. (2004)

19. Bangladesh Rice Research Institute
Results and Discussions

20. Grain and straw yield (t/ha) of T. Aus Rice (BRRI dhan27), T.
Aman (BRRI dhan49) and Boro (BRRI dhan29 & BRRI
dhan47), 2012-13
Bangladesh Rice Research Institute
Parameters Treatment T. Aus, 2012
(n=6)
T. Aman,
2012
(n=9)
Boro, 2012-13
(n=4)
Mean ± SD Mean ± SD Mean ± SD
Grain yield
(t/ha)
T1 (BRRI dose) 3.99 ± 0.45 3.66 ± 0.75 6.90 ± 0.96
T2 (Rice straw + IPNS) 4.38 ± 0.68 4.01 ± 0.72 7.52 ± 0.57
T3 (Farmer’s practice) 3.46 ± 0.47 3.37 ± 0.66 6.28 ± 0.74
Straw yield
(t/ha)
T1 (BRRI dose) 3.84 ± 0.25 3.32 ± 0.49 5.62 ± 1.04
T2 (Rice straw + IPNS) 4.41 ± 0.44 4.05 ± 0.90 5.58 ± 1.28
T3 (Farmer’s practice) 3.32 ± 0.51 3.09 ± 0.40 4.78 ± 0.79

21. Grain and straw yield (t/ha) of T. Aus Rice (BRRI dhan27), T.
Aman (BRRI dhan54) and Boro (BRRI dhan47), 2013-14
Bangladesh Rice Research Institute
Parameters Treatment T. Aus, 2013
(n=6)
T. Aman,
2013
(n=7)
Boro, 2013-14
(n=5)
Mean ± SD Mean ± SD Mean ± SD
Grain yield
(t/ha)
T1 (BRRI dose) 3.87±0.34 3.86±0.23 6.70±0.56
T2 (Cowdung + IPNS) 4.04±0.46 3.99±0.45 6.91±0.60
T3 (Farmers’ practice) 3.49±0.42 3.62±0.29 6.23±0.54
Straw yield
(t/ha)
T1 (BRRI dose) 7.21±0.77 4.50±0.96 7.21±0.32
T2 (Cowdung + IPNS) 7.43±1.21 4.32±0.62 7.50±0.23
T3 (Farmers’ practice) 5.83±0.95 4.02±0.82 6.66±0.22

22. Conclusion
Bangladesh Rice Research Institute
 Rice straw/cowdung with IPNS basis chemical fertilizer
performed best to get a maximum yield.
 Rice straw applied with IPNS based chemical fertilizer gave
20-27% higher yield over FP and it saved full dose of K and S
and partially P fertilizer in all season.
 Cowdung gave 10-16% higher yield over FP and it saved full
dose of P, K and S fertilizer in T. Aus and T. Aman season but
in Boro season an additional little dose of P fertilizer was
needed.
 On the other hand, BRRI recommended dose (only chemical
fertilizer) gave 6-15% higher yield over FP.
 Organic manure can save foreign currency, spend to import
chemical fertilizer.

23. Thank You
Bangladesh Rice Research Institute