INTRODUCTION
• Kenya is a food insecure
• Economy reliant on rain-fed agriculture(by a
factor of 1.6)
• Key intervention: irrigation
• Irrigation challenged by water scarcity, low
input productivity, high production costs
• Need to develop resource-efficient (resourcesaving) technologies e.g. SRI and UDP in rice
cultivation
PROBLEM STATEMENT
• Rice cultivation faces water scarcity and high
production costs
• Need to reduce use of rice water and production
inputs
• SRI saved irrigation water by approx. 30% and
increased yield by nearly 30%; UDP saved fertilizer
use by approx. 50% and increased yield by nearly
20% in rice
• Is there a possible synergy from a combination of
SRI and UDP? No trials have been conducted
OBJECTIVE
To evaluate the effectiveness of combining SRI
and UDP practices on growth and yield of lowland rice
Varieties:
• Evaluate performance of different lowland rice
varieties under SRI/UDP
• Determine optimal spacing for the test varieties
under SRI and UDP
METHODS
• Trial site MIAD (latitudes 37°13’E and 37°30’E,
longitudes 0°32’S and 0°46’S and altitude of 1195 m
a.s.l.)
• RCBD with split-split plots (USG as main plot,
varieties as sub-plots and spacing as sub-sub-plots)
with three replicates
• Fertilizers: 2.7 g USG, 1.8 g USG, standard practice
(SA)
• Rice varieties: Basmati 370, IR 2793, BW 196
• Spacing levels: 20cmx20cm, 25cmx25cm,
30cmx30cm
DATA COLLECTION
• Soil sampling at start and end of the experiment
• Rice growth data: plant height, total tillers,
productive tillers,
• Rice yield data: panicle length, total and filled
grains, 1000-grain weight, yield
DATA ANALYSIS
Analysis using SAS program (SAS institute,2002)
RESULTS- final plant height
IR2793
1.8G (USG)
2.7G (USG)
BW 196
STANDARD
1.8G (USG)
STANDARD
85
S1=20 X20
S2= 25 X25
S3=30 X 30
80
75
PLANT HEIGHT (CM)
90
70
85
S1=20 X20
S2= 25 X25
S3=30 X 30
80
75
70
S1
S2
S3
S1
S2
SPACING
SPACING
Basmati 370
1.8G (USG)
2.7G (USG)
STANDARD
135
PLANT HEIGHT (CM)
PLANT HEIGHT (CM)
90
2.7G (USG)
130
125
120
S1=20 X20
S2= 25 X25
S3=30 X 30
115
110
S1
S2
SPACING
S3
S3
RESULTS – total tillers
Basmati 370
2.7G (USG)
IR 2793
STANDARD
1.8G (USG)
60
50
50
TILLER NUMBER
60
40
S1=20 X20
S2= 25 X25
S3=30 X 30
30
20
S1=20 X20
S2= 25 X25
S3=30 X 30
20
0
0
S2
S1
S3
S2
SPACING
SPACING
BW 196
1.8G (USG)
2.7G (USG)
STANDARD
70
60
50
S1=20 X20
S2= 25 X25
S3=30 X 30
40
30
20
10
0
S1
STANDARD
30
10
S1
2.7G (USG)
40
10
TILLER NUMBER
TILLER NUMBER
1.8G (USG)
S2
SPACING
S3
S3
RESULTS- productive tillers
Basmati 370
1.8G (USG)
2.7G (USG)
IR 2793
STANDARD
1.8G (USG)
50
STANDARD
60
40
35
30
S1=20 X20
S2= 25 X25
S3=30 X 30
25
20
15
10
PRODUCTIVE TILLERS
45
50
40
30
S1=20 X20
S2= 25 X25
S3=30 X 30
20
10
5
0
0
S1
S2
S1
S3
S2
SPACING
SPACING
BW 196
1.8G (USG)
2.7G (USG)
STANDARD
70
PRODUCTIVE TILERS
PRODUCTIVE TILLERS
2.7G (USG)
60
50
40
S1=20 X20
S2= 25 X25
S3=30 X 30
30
20
10
0
S1
S2
SPACING
S3
S3
RESULTS – panicle length
Basmati 370
1.8G (USG)
2.7G (USG)
IR 2793
STANDARD
1.8G (USG)
STANDARD
25
S1=20 X20
S2= 25 X25
S3=30 X 30
20
15
10
PANICLE LENGTH (CM)
30
25
S1=20 X20
S2= 25 X25
S3=30 X 30
20
15
10
S1
S2
S3
S1
SPACING
S2
SPACING
BW 196
1.8G (USG)
PANICLE LENGHT (CM)
PANICLE LENGTH (CM)
30
2.7G (USG)
2.7G (USG)
STANDARD
20
19.5
19
18.5
18
17.5
17
16.5
16
15.5
15
S1=20 X20
S2= 25 X25
S3=30 X 30
S1
S2
SPACING
S3
S3
RESULTS – total grains
Basmati 370
IR 2793
TOTAL GRAINS
TOTAL GRAINS
100
NUMBER OF GRAINS
50
40
1.8G (USG)
30
2.7G(USG)
20
STANDARD
10
0
S1
S2
80
60
1.8G (USG)
40
2.7G(USG)
STANDARD
20
0
S3
S1
SPACING
S2
SPACING
BW 196
NUMBER OF GRAINS
NUMBER OF GRAINS
60
TOTAL GRAINS
90
80
70
60
50
40
30
20
10
0
1.8G (USG)
2.7G(USG)
STANDARD
S1
S2
SPACING
S3
S3
RESULTS – filled grains
Basmati 370
IR 2793
2.7G(USG)
STANDARD
S1
S2
NUMBER OF GRAINS
FILLED GRAINS
1.8G (USG)
S3
90
80
70
60
50
40
30
20
10
0
1.8G (USG)
2.7G(USG)
STANDARD
S1
SPACING
S2
SPACING
BW 196
FILLED GRAINS
70
NUMBER OF GRAINS
NUMBER O FGRAINS
FILLED GRAINS
50
45
40
35
30
25
20
15
10
5
0
60
50
40
1.8G (USG)
2.7G(USG)
STANDARD
30
20
10
0
S1
S2
SPACING
S3
S3
RESULTS – 1000-g wt
Basmati 370
1.8G (USG)
2.7G (USG)
IR 2793
STANDARD
1.8G (USG)
1000 GRAIN WEIGHT (G)
25
20
15
10
5
0
S1
S2
S3
S1
S2
SPACING
BW 196
1.8G (USG)
2.7G (USG)
STANDARD
36
35
34
33
32
31
30
S1
STANDARD
34
33
32
31
30
29
28
27
26
25
SPACING
1000 GRAIN WEIGHT (G)
1000 GRAIN WEIGHT (G)
30
2.7G (USG)
S2
SPACING
S3
S3
RESULTS - yield
IR 2793
Basmati 370
1.8G (USG)
2.7G (USG)
STANDARD
1.8G (USG)
2.7G (USG)
STANDARD
8000
1000
S1 =20x20
S2 =25x25
S3 =30x30
800
600
400
YIELD (KG/HA)
1200
200
7000
S1=20 X20
S2= 25 X25
S3=30 X 30
6000
5000
4000
3000
2000
S1
0
S1
S2
S3
S2
SPACING
SPACING
BW 196
7000
6000
YIELD (KG/HA)
YIELD (KG/HA)
1400
5000
4000
1.8G (USG)
3000
2.7G (USG)
2000
STANDARD
1000
0
S1
S2
SPACING
S3
S3
DISCUSSION
• No significant difference in final plant height, total
and productive tillers, panicle length, total and filled
grains, 1000-grain weight and yield for all the
varieties under the respective treatments
• These results confirm observation made in the
previous trial
CONCLUSION
• On the basis of these results a combination of SRI
and UDP techniques does not directly change the
final plant height, total and productive tillers,
panicle length, total and filled grains, 1000-grain
weight as well as yield
RECOMMENDATION
• Conduct economic (cost/benefit) analysis of SRIUDP compared as to conventional