The simulated experiment of leaching of the NO 3 N, NH 4 N and K in soil was conducted after the crystal organic
fertilizer,
compound fertilizer and urea were applied in the soil. The sequence of total amount of leaching of NO 3 N was the compound fertilizer (629 mg),urea (586 mg) , the
crystal organic fertilizer (368 mg),the compound fertilizer and urea treatment were 1.71 and 1.59 times as much as the crystal organic fertilizer treatment. The sequence of total amount of leaching of NH 4 N was urea (53 mg) , the compound fertilizer (41 mg), the crystal organic fertilizer (20 mg),the urea and the compound fertilizer were 2.64 and 2.05 times as much as the crystal organic fertilizer treatment. The sequence of total amount of leaching of K was urea (398 mg), the compound fertilizer (303 mg), the crystal organic fertilizer (188 mg),the urea and the compound fertilizer were 2.12 and 1.61 times as much as the crystal organic fertilizer treatment, respectively. The result of comparison NO 3 N,NH 4 N,K of the upper soil with the lower soil was that urea treatment was the weakest in holding soil nutrients, the compound fertilizer treatment moderate, and the crystal organic fertilizer treatment was the strongest. These results indicated that the crystal organic fertilizer would reduce the leaching amounts of NO 3 -N, NH 4 -N and K,which is important to the increase of the rate of fertilizer utilization.