The Investigation of Effect of Culture History onPotassium in Soils under Sugarcane Crop in KhuzestanProvince of Iran

摘要

In order to investigating the effect of culture history on available K in soilunder sugarcane cultivation in khuzestan province, 48 complex soil samples werecollected from depth of 0-30 and 30-60cm . Results indicated that in farms with longterm culture, available k is lower than reported critical levels. When testing the effect ofculture history on available k in the 30 cm depth, we observed the culture history hasdecreased available K of testing soil ( p< 0.05). this correlation was not significant fordepth of 30-60 cm. the investigating of mean yield in farmlands of Karun culture andindustry( 24000 ha.) over 19 years ( 1982-2001) showed that with increasing culturehistory the different between plant and Raton has been increased ( R= 0.71).