Effect of irrigation frequencies on yield and water use efficiency of wheat varieties
2010
Mishra, A.K. | Tripathi, Padmakar
Field experiment was conducted to study the effect of irrigation frequencies on yield and water use efficiency of wheat varieties during Rabi seasons of 2002-03 and 2003-04. The 12 treatment combinations comprised of four irrigation levels viz., I1 (one irrigation at CRI stage), I2 (two irrigations: one each at CRI and flowering stages), I3 (three irrigations: one each at CRI, LT and flowering stages) and I4 (four irrigations: one each at CRI + LT + LJ + ear head formation stages) along with the combination of three varieties viz., HUW-234, HD-2285 and PBW-154. Progressive increase in number of irrigations from 1 to 4 increased various yield contributing characters viz., effective tillers m-2, ear length, no. of grains ear-1 and test weight while three and four irrigations were found statistically at par with each other. The highest grain yield (40.65 q ha-1) was credited to I4 that was significantly superior over I1 and I2 but non-significant with I3. Consumptive use of water increased while water use efficiency gradually decreased with increase in number of irrigations. Among the varieties tested, HUW-234 recorded significantly higher yield and yield contributing characters and was found superior over rest two varieties. On the other hand, no significant difference was found between HD-2285 and PBW-154 for most of the yield characters. Highest consumptive use of water was credited to PBW-154 resulting in lowest water use efficiency. However maximum water use efficiency among the varieties was recorded in HUW-234.
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