The Effect of Organic Manure and Water Super Absorbent on Tuber Yield and Yield Components of Potato (Solanum tubersum, cv. Marfona)

In order to investigate effect of organic manure and super absorbent on potato (Solanum tubersum، cv. Marfona) yield، a split plot experiment was conducted in randomized complete block design with three replications on field experiment، Agriculture College، University of Razi in 2010. Main factor included two levels of super absorbent A200 (0 and 70 Kg/ha،) and split plot included nine levels (0، chemical fertilizer (according to soil test)، granule chicken manure (1000 kg/ha)، common chicken manure (12 ton/ha)، soil mix (1000 kg/ha)، common animal fertilizer (20 ton/ha)، vermicompost (20 ton/ha)، compost (20 ton/ha) and tea compost (soaking tubers and spraying at four times). Effect of superabsorbent and organic manure and their interaction on tuber dry matter per hectare was significant. Effect of superabsorbent on stem number per plant، tuber yield and plant height was significant (P < 0. 05)، but superabsorbent did not have any significant effect on tuber number per plant. Results showed that different levels of organic manure had a significant effect on plant height، tuber number per plant، stem number per plant، tuber yield and diameter، tuber weight per plant and total dry matter per plant. Totally، it is concluded that granule chicken manure (with or without superabsorbent) had the highest effect on all of these traits. Correlation coefficients showed that tuber fresh matter per hectare had a positive and significant correlation with stem diameter، stem number per plant، tuber number per hectare، mean micro tuber diameter of 10 to 35 mm. Tuber fresh matter per hectare had a significant and positive correlation with harvest index.