我们曾在无锡黄泥土上,进行了~(15)N标记硫酸铵在早稻返青后表施的氮素平衡的研究[1],为了进一步了解在不同施用方法下,~(15)N标记硫酸铵的氮素平衡情况,又在无锡黄泥土和竖头黄泥土上进行了试验。但在试验过程中,黄泥土上的一组试验,未能得到完整的资料,因此,本文报告的只是竖头黄泥土上的一 We studied the nitrogen balance of ~ (15) N-labeled ammonium sulfate in the early rice after rejuvenation on the yellow soil of Wuxi [1]. In order to further understand the effects of different concentrations of ~ (15) N labeled sulfuric acid Ammonium nitrogen balance situation, but also in Wuxi yellow soil and the head of yellow soil were tested. However, during the experiment, a group of tests on the yellow mud failed to obtain the complete data. Therefore, the paper reported here is only one