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INTRODUCTION

In Kenya, where food insecurity looms due to reliance on rain-fed agriculture, the adoption of resource-saving technologies like System of Rice Intensification (SRI) and Unified Diffusion Practices (UDP) is essential. Our study evaluates the impact of combining SRI and UDP on lowland rice growth and yield, focusing on various rice varieties and optimal plant spacing. Despite previous successes of each method in saving irrigation water and production costs, our findings suggest that no significant yield improvement occurs through their combination. Further economic analysis is recommended for optimization.

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INTRODUCTION

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  1. 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 (resource-saving) technologies e.g. SRI and UDP in rice cultivation

  2. 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

  3. 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

  4. 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

  5. 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

  6. DATA ANALYSIS Analysis using SAS program (SAS institute,2002)

  7. RESULTS- final plant height IR2793 BW 196 Basmati 370

  8. RESULTS – total tillers Basmati 370 IR 2793 BW 196

  9. RESULTS- productive tillers Basmati 370 IR 2793 BW 196

  10. RESULTS – panicle length Basmati 370 IR 2793 BW 196

  11. RESULTS – total grains Basmati 370 IR 2793 BW 196

  12. RESULTS – filled grains Basmati 370 IR 2793 BW 196

  13. RESULTS – 1000-g wt Basmati 370 IR 2793 BW 196

  14. RESULTS - yield IR 2793 Basmati 370 BW 196

  15. 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

  16. 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

  17. RECOMMENDATION • Conduct economic (cost/benefit) analysis of SRI-UDP compared as to conventional

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