Genetic similarities were calculated using simple matching coefficient, and the phenogram was constructed by using UPGMA method. Three cultivars of n.
计算各样本间的相似性系数和遗传距离，并采用UPGMA法对遗传距离进行了聚类分析。
The plant residue with more lignin has a higher humification coefficient. As the residue containing more N is more favorable to the formation of soil microaggregate.
其中含木素较多的植物残体，表现为腐殖化系数较高，含氮多的植物残体，则有利于土壤微团聚体的形成。
The correlation coefficient between total ammonia volatilization and N leaching rate was 0.903.
土壤氨挥发总量与肥料累积溶出量相关系数为0.903；
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