EFFECTS OF LEAD WATER IRRIGATION UNDER ZEOLITE STRESS ON RICE GROWTH

This paper aims to study the effects of lead concentration in irrigation water on the yield and growth traits of rice under soil zeolite stress, with the addition of lead accumulation in rice plants, which were tested in a micro zone at the Experimental Base of Water Conservancy in Shenyang Agricultural University of Liaoning Province, China, through the application of different amounts of zeolite (0, 2500, 5000kg•ha -1 ) and different lead concentrations (0, 0.25, 0.2, 0.15 mg•L -1 ) in irrigation water.It was concluded that the lead contents in paddy root, stem, leaf and rice significantly varied with different exogenous lead concentrations.With the increase of the concentration, the lead contents in each part were significantly increased.More importantly, the effect on aboveground material weight was greater than that on underground material weight.The water contents of rice were increased with the decrease in the protein content, and starch content was decreased under zeolite stress.When the concentration of lead increased, the effect was more pronounced.Comprehensive test with various factors indicated that the incorporation of zeolite in soil for rice cultivation with lead-contaminated water irrigation or lead contaminated soil could restrain the movement of lead ions into the rice.