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Rice (Oryza sativa L.) establishment methods under irrigated and rain-fed lowlands of Kenya: Effect on growth and yield

Journal: International Journal of Agronomy and Agricultural Research (IJAAR) (Vol.14, No. 1)

Publication Date:

Authors : ;

Page : 26-36

Keywords : Direct seeding; Transplanting; Lowland ecology; Yield of rain-fed; Irrigated rice.;

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An experiment was conducted at Ahero and Mwea during July 2017 to January 2018 season; to assess effect of direct seeding (DS) and transplanting (TP) on growth and yield of four rain-fed ( NERICA1 & 4, Komboka, MWUR4) and four irrigated (SARO5, Komboka, NIBAM11, MWIR2) varieties, on Kenyan lowlands. A split plot on randomized complete block design (RCBD) was used with three replicates; three seeds hill-1 were dibbled, later thinned to one on DS plots, one seedling was transplanted on TP plots. A (20×15) cm spacing used on both DS and TP plots. Data was subjected to analysis of variance, separation of means using Turkey's test at 5% probability level. Results on plant height, productive tillers hill-1, grain weight hill-1, 1000 seed weight, yields (rain-fed) showed non-significance (p> 0.05). Days to flowering onset (rain-fed) had significant differences on DSR and TPR. Productive tillers hill-1 (Irrigated) were significant (p<0.05) while grain yield, grain weight hill-1, 1000 seed weight, days to flowering onset (irrigated) were not significant (p>0.05). Grain yield (t ha-1) on rain-fed varieties indicated TP-Komboka (5.6), TP-NERICA1 (4.6) compared to Komboka and MWUR 4 (DS) at 4.9 and 4.3 respectively. Grain yield (t ha-1) (irrigated) had no yield gain on either TP or DS though they differed significantly with NIBAM 11 and MWIR 2 (TP) at 4.9 and 6.9 while DS- (MWIR2 and NIBAM11) at 5.9 and 4.8 respectively. Harvest index positively correlated to grain yield (rain-fed; r=0.693, p<0.001) (irrigated r =0.696, p<0.001). Variable costs were TP (KES: 81,850) compared to DS (KES 61,900). Although DS yielded less compared to TP, the aspect of water and labour saving would motivate its wide adoption contributing to enhanced rice productivity.

Last modified: 2020-05-04 04:39:07