the effect of organic manure and super absorbent on physiological and biochemical characteristics of potato (solanum tubersum, cv marfona)

in order to investigate effect of organic manure and super absorbent on physiological and biochemical traits of potato (solanum tubersum, cv marfona), a split plot experiment was conducted as randomized complete block design with three replications at research farm, 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), cow manure (20 ton/ha), vermicompost (20 ton/ha), compost (20 ton/ha) and tea compost (soaking tubers and spraying at four times). investigating physiological traits such as leaf chlorophyll index, chlorophyll florescence and stomata conductance showed that only leaf chlorophyll index was affected by superabsorbent (p < 0.01) and organic manure (p < 0.05), while stomata conductance wad significant under it’s interaction effect at (p < 0.05). quality and biochemical traits show that phosphorous amount of tuber was significant in superabsorbent treatment in compare to control. crude oil percentage, protein, fiber, starch, sugar, nitrogen, phosphorous and potassium content were not affected by organic manure. the highest amount of oil and fiber were obtained under compost and cow manure respectively. sugar and nitrogen content were high under cow manure treatment. the highest amount of potassium and phosphorous content were belonging to chicken and khakparvar manure respectively.