Response of upland rice agronomic parameters to variable water supply
旱稻农艺参数变量供水作者机构：Department of Agricultural EngineeringFederal University of TechnologyAkureNigeria Department of Agricultural and Environmental EngineeringUniversity of IbadanNigeria
出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)
年 卷 期：2011年第4卷第2期
页 面：50-58页
主 题：agronomic parameters upland rice water supply irrigation scheduling response rice yield
摘 要：Rice response to water application is necessary for increased productivity;hence,this study was aimed at establishing the agronomic responses of rice crop to differential water supplies.A two-year dry season experiment was conducted on the research farm of International Institute of Tropical Agriculture(IITA),Ibadan,*** upland rice varieties(NERICA 2 and NERICA 4)were planted on a 5 m×5 m plot in a randomized complete block design with four treatments and two replicates based on different water *** scheduling was designed as 100%ET,75%ET,50%ET and 25%ET for the treatments *** parameters such as plant height,root depth,canopy shading(CS),leaf area index(LAI),panicle and tiller configuration,biomass and grain yield in relation to crop water use were obtained and the results were subjected to statistical *** values of highest plant height(89.0 and 100.3 cm),deepest root depth(22.1 and 23.8 cm),panicle diameter(3.9 and 4.5 cm),panicle length(26.1 and 25.7 cm),LAI,3.27 and 3.95,CS,0.22 and 0.99 were obtained for both NERICA 2 and NERICA 4 *** width(1.3 and 1.4 cm),total tillers(14 and 12)and leaf length(36.9 and 38 cm)were also observed for the two varieties *** highest total grain and biomass yields of 1.94 t/ha and 1.95 t/ha were observed in 100%ET treatment for NERICA 2 while the least values of 0.29 t/ha and 1.09 t/ha were observed in 25%ET *** for NERICA 4,the highest values(1.90 t/ha and 2.27 t/ha)were from 100%ET and the least(0.38 t/ha and 2.29 t/ha)in 25%*** result of ANOVA showed significant differences in biomass and grain yield,LAI,CS,plant height and root depth among treatments(P0.05)stressing the domineering influence of water in agronomic response of rice.
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