Behaviour of chlorion from ammonium chloride application in irrigated-desert soil in Hexi Corridor

The result of six years application of ammonium chlorindicates that chlorion absorbed by crop is 15．88%～26．92% ，its leaching loss is 47．0%～59．4%，its residue in O～150cm soillayer is 24．7%～26．1%．As a result of crop absorption and leaching through irrigation，the remained chlodon accounted for 3．0%～6．6% in O～40cm layer，0．71%～2．4% in 0～20cm farming layer．There are no harmful effects on quality properties and growth vigour of crop，soil property．Correlation between the residue of chlorion and test period is negative．Correlation between the quantity of leaching,loss and test period is positive．Correlations between the quantity of fertilizer and the residue ratio and leaching loss are positive．Therefore，thechemicaI fertilizer which contains chloride are suited to be used in combination with no chloride fertilizer or intermittently．