【摘要】 采用土柱淋溶模拟试验，结果表明，在土壤有机氮组分中，氨基酸态氮和ＮＨ３—Ｎ是易于移动的形态．非酸解性氮则相对稳定，不易移动；无机氮组分中ＮＯ３—Ｎ是易于移动的形态，ＮＨ４—Ｎ次之，非交换态铵是稳定的形态，难以移动。水肥是决定ＮＯ３—Ｎ淋失的重要因素．ＮＯ３—Ｎ的淋溶量随着淋洗水量的增加而增加，施用氮肥增加了ＮＯ３—Ｎ的淋溶量。更多还原

【Abstract】 The simulative soil columns in the laboratory were used to research the distributionand movement of the forms of soil nitrogen in profile under different amount of irrigation water.It was indicated that the distribution of the fromation ous of soil nitrogen depended upon theirown chemical properties and duty of irrigative water after the nitrogen ous fertilizers were applied.Aminoacid N and NH₃-N move easily With the water movement in the profile and nonhydrolized N can hardly move with the water movement in the profile among the components of organic nitrogen.Nitrate move easily. ammonium did not move easily and nonexchangable ammonium can hardly move with the water movement in the profile among the components of inorganicnitrogen.At all,the leaching losses of NO 3--N were to be decided by the two main factors of theirrigative water and fertilizers.The leaching losses of nitrogen add with the increase in irrigativewater, moreover.application of nitrogen fertilizer can make the leaching losses of nitrate increasement.更多还原