In iran, water is a scarce resource, due to the high rainfall variability. The water stress effects depend on deficit timing, duration and magnitude. This study investigated the effects of interaction between manure and super absorbent (zeolite and superabsorbent polymers) on the yield and yield components and some physiological traits in Rapeseed (Brassica napus cvs Zarfam) under water deficit. Research was conducted with complete randomized block experimental design with split -Factorial arrangement with three replications. In this experiment, the main plots consisted of water deficit with 3 levels: 1-Normal Irrigation , 2- Cut Irrigation in flowering, 3- Cut Irrigation in silique feeding , And super absorbent (zeolite and superabsorbent polymers) application were performed at three levels: 1-(Control) Non super absorbent , 2- Zeolit 10 ton per hector , 3- superabsorbent polymers 8 Kg per hector. And manure applications were performed at three levels: 1- No manure (Control) 2- manure 20 ton per hector 3- manure 40 ton per hector , were allotted to sub plots. Results of analysis of variance indicated that the interaction effects of water deficit, super absorbent and manure application on the characteristics Plant height, the number of silique per plant, the number of grain in silique, grain yield, biological yield, harvest index and oil percentage were significant at the 1% level, However, the Branches per plant and 1000grain Weigh of water deficit treated with super absorbent and manure application were significant at the 5% level. In this study, the maximum grain yield (4228.4 kg ha-1) was obtained from Normal Ir* Zeo 10ton/ha manure 40 ton per hector. Water stress at silique feeding reduced oil content of seed. The result of table 4 showed the highest and lowest seed oil percentage achieved from (I0* S *C1) stage (49.71%) and (I2* Z0S0 *C2) with average (40.1%) treatment, respectively. There was not significant with( I2* Z0S0* C0), ( I2* Z0S0 *C1) ,(I2* S *C2) and( I1* Z0S0* C0) the most total above ground biomass and number of grain per plant were observed on (I0*Z*C2) treatment with average (9896.7 Kg/ha) and (371.4 N.O) respectively.
