Management of rice production systems to increase productivity
Management of rice production systems to increase productivity
Management of rice production systems to increase productivity
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Table 17. SRI Practice with cv IET 3137 and Different Plant Spacing,<br />
Variety Inter<br />
Space<br />
(cm)<br />
IET 3137<br />
IET 3137<br />
IET 3137<br />
LSD.05<br />
CV(%)<br />
Sapu, The Gambia 2001<br />
20x20<br />
30x30<br />
40x40<br />
Panicle<br />
Setting<br />
Ratio<br />
(%)<br />
49.2<br />
50.8<br />
63.8<br />
ns<br />
18.7<br />
S<strong>to</strong>ver<br />
T/Ha<br />
Yield<br />
T/Ha<br />
101<br />
Comparison with the local management practice <strong>of</strong> continuous flooding<br />
was not possible during the 2001 cropping season, because the continuously<br />
flooded crop suffered severely as a result <strong>of</strong> inadequate moisture conditions<br />
after flowering. Spikelet sterility was 100%, there was a complete crop failure.<br />
In 2002, an additional variety BG 90‐2 was included. BG 90‐2 is the most<br />
widespread <strong>rice</strong> variety in the Sahel, it is grown in the Office du Niger and<br />
Kou Valley projects in Mali and Burkina Faso, as well as in Senegal river<br />
valley irrigation scheme and in Mauritania. BG 90‐2 is earliest maturing <strong>of</strong> the<br />
test varieties (Table 18). Tillering was highest for all varieties at 40 x 40 cm<br />
spacing, and corresponding panicle <strong>production</strong> was highest at this spacing.<br />
Table 18. SRI Practice Using Different Varieties and Plant Spacing,<br />
Sapu, The Gambia, 2002<br />
3.7<br />
5.6<br />
4.7<br />
ns<br />
25.0<br />
5.3<br />
3.2<br />
1.8<br />
1.4<br />
23.1
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