Investigation of the effect of zeolite and superabsorbent on some quantitative and biochemical properties of rapeseed under irrigation cut-off conditions in Shiraz region.

This study was conducted to investigate the effect of Cut irrigation and application of zeolite (10 T.ha) and superabsorbent (1 Kg.ha) in rapeseed in Shiraz city. The statistical format of the design was Split plotsbased on random complete blocks in 3 replications. The main factor in the three levels of cut irrigation (A) includes: 1- cut Irrigation in the stem stage 2- Cut Irrigation in the flowering stage 3- Cut Irrigation in the podding stage and the Sub-factor in the four levels of zeolite and superabsorbent (B) Includes: 1- Non-use of zeolite and superabsorbent 2- Use of zeolite (10 t.ha) 3- Use of superabsorbent (1 kg.ha) 4- Use of zeolite (10 t.ha) and superabsorbent (1 kg.ha).The results of analysis of variance showed that the simple effects of cut irrigation and zeolite , superabsorbent were caused on grain yield, oil yield and leaf chlorophyll content significant differences at the level of one and five percent.The interaction effect of cut irrigation and application of zeolite and superabsorbent were significant on all traits.Maximum grain yield as the most important trait was obtained from cut irrigation treatment at the stage of stemming and application of 10 t.ha of zeolite + 1 Kg.ha of superabsorbent at the rate of 3528.4 kg. ha.And the lowest grain yield belonged to the cut irrigation treatment in the flowering stage and no zeolite or superabsorbent at the rate of 1678.2 kg. ha.Cut irrigation increased the amount of antioxidant enzymes,But the application of zeolite and superabsorbent had the opposite effect and the traits showed a significant decrease.It can be said that flowering and podding stages are sensitive stages in rapeseed and the use of zeolite (10 t.ha) and superabsorbent (1 Kg.ha) to reduce drought effects as the best treatment It was found.