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Title: Effects of Tillage and Planting Methods on Rice Growth and Yield in Kenya
Authors: Wanjogu, Raphael Kinyanjui
Keywords: Tillage -- Planting Methods -- Rice Growth
Issue Date: Feb-2000
Publisher: Egerton University
Abstract: This research aimed at studying the effects of zero tillage and wet seeding (direct sowing of pre-germinated rice) on flooded rice to develop a better production package for farmers to enhance rice production in Kenya. Zero tillage using glyphosate was compared with ploughing and rotavation. Rotavation is the conventional tillage method that involves tilling flooded paddy fields with roto-tillers. Wet seeding was tested against the standard method of rice establishment, transplanting. Two commercial rice varieties, NTBAM 10 and NIBAM 108, were grown during 1998 and 1999. NIBAM 10 and NIBAM 108 were cultivated in Mwea Irrigation Research Station while in Ahero Irrigation Research Station only NIBAM 108 was cultivated. A split plot randomized complete block design was used with tillage as the main plot and rice establishment method as the subplot. Data was collected on yield, yield components and other plant growth parameters. Zero tillage gave similar results to the conventional method (rotavation). Zero tillage crop gave an average yield of 4917 kg/ha at Ahero and 6834 kg/ha in Mwea as compared to 4577 kg/ha and 6833 kg/ha, respectively for control with NIBAM 108, Yields of “NIBAM 10” under zero tillage averaged 2658 kg/ha while that of control came to 2799 kg/ha. Zero tillage reduced crop growth duration by 4 days above control. Among the plant establishment methods, wet seeding recorded better crop growth rate and yield performance giving an overall of 18% more yields than transplanting. It also reduced crop cycle by an average of 11 days. These results suggest that the wet seeding system can be recommended for enhancement of rice production in the regions under study. The combination of zero tillage and wet seeding had no adverse effect on the rice yield and growth characters. The methods can be applied for both long rain and short rain seasons of the two study regions. However, in Mwea the short rain crop had higher yield and better plant growth than the long rain crop. The Mwea site environment gave better rice growth and yield irrespective of the season used than Ahero site. The study tends to indicate that planting rice by wet seeding method in zero tilled paddy field result to multiple benefits as compared to the conventional system. The system is recommended for irrigated rice schemes to increase paddy field utilization and rice yields with possible reduction of drudgery.
Appears in Collections:Faculty of Agriculture

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