EFFECT OF IRRIGATION REGIME ON SOME RAPE VARIETIES

Document Type : Original Article

Authors

1 Soil and Water Research Institute, Agricultural Research Centre , Giza, Egypt

2 Soil and Water Research Institute, Agricultural Research Centre , Giza, Egypt.

Abstract

Two field experiments were carried out at Mallawi Agric. Res. Station for the two successive Years 1989 and 1990 to study the effect of water regime on plant height, seed yield , o.l percentage, consumptive use and water use efficiecy of different rape varieties. The results re-vealed that : Plant height, seed yield Kg / fed and oil percentage were signifi-cantly affected by availble soil moisture depletion (ASMD) levels, the highest mean values were obtained with irrigation after 40% depletion in available soil moisture, followed by 60% then 80%. The same characteristics were not significantly affected by the different varieties, except the number of pods and seed yield which were affected by the same factor . The rape variety (V2) " Semue 201/81 Gl" is the best cultivated variety in this experiment. It gave the highest values for plant growth and seed yield. Consumptive use was increased by decreasing soil moisture stress. The highest mean values were obtained at treatment 40 % (ASMD ), while the lowest mean values were obtained at 80 % ( ASMD). The highest water use efficiency for seed production was ob-tained for variety " Semue 201/80 GI " , when irrigated at 60% (ASMD). The highest water use efficiency for seed production was ob-tained for variety " Semue 201/80 61", when irrigated at 60% (ASMD) in the two successive years. 
 

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